Rosetta Code/Count examples/Full list

Full output for the Rosetta Code/Count examples#Raku task. Updated periodically.

This is something of a experiment. The languages have their completed task entries marked with a circled digit in the table so you can sort on the language to see which tasks have been done. Hold down control and click on several columns to do secondary, tertiary, etc. sorts.

Languages that omit a certain task have an uppercase O filled in for that task.

Ideally it would be nice to be able to generate the table on demand for any language but it is fairly intensive to generate. Once a week is ok, on demand would be unsustainable.

More than about 10 languages per page gets unwieldy and difficult to navigate. Generate reports for the top N languages in groups of 10. (N == 40 for now.)

See Rosetta_Code/Rank_languages_by_popularity/Full_list for a full language/task completion table.

Top tier

Second tier

Third tier

Fourth tier

First ten programming languages by number of task examples completed:
    ① Phix          ② Wren          ③ Julia         ④ Raku          ⑤ FreeBASIC    
    ⑥ Perl          ⑦ Nim           ⑧ Python        ⑨ Go            ⑩ Java         

As of 2025-01-18T16:25:38Z :: Tasks: 1309 :: Draft Tasks:380 :: Total Tasks: 1689 :: Total Examples: 99794

Count	Task	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
603	Hello world/Text	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
393	FizzBuzz	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
383	99 bottles of beer	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
360	100 doors	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
316	Factorial	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
315	Comments	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
313	Fibonacci sequence	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
307	A+B	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
297	Empty program	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
257	Reverse a string	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
253	Loops/Infinite	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
250	Ackermann function	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
249	Function definition	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
248	Arrays	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
244	Loops/For	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
237	Conditional structures	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
237	Loops/While	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
228	Array concatenation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
223	Arithmetic/Integer	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
218	Greatest element of a list	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
212	Greatest common divisor	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
211	Repeat a string	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
209	Even or odd	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
207	Increment a numerical string	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
207	Sieve of Eratosthenes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
206	Array length	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
204	Binary digits	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
202	Averages/Arithmetic mean	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
199	Hello world/Graphical	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
199	String concatenation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
198	Copy a string	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
198	Towers of Hanoi	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
196	Rot-13	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
194	Loops/Downward for	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
193	Sum and product of an array	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
192	Integer comparison	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
192	Palindrome detection	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
191	Boolean values	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
191	Hello world/Newline omission	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
190	Character codes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
189	Apply a callback to an array	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
188	Integer sequence	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
187	String length	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
186	Loops/For with a specified step	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
186	String case	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
186	Tokenize a string	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
183	Loops/Break	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
183	Sum of a series	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
182	Empty string	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
182	Loops/Foreach	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
180	Quine	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
179	Sum of squares	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
177	Dot product	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
177	Logical operations	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
176	Filter	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
175	Hailstone sequence	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
174	Loops/Do-while	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
169	Loops/N plus one half	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
167	Leap year	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
166	Generic swap	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
165	Caesar cipher	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
165	Sort an integer array	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
164	Associative array/Creation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
163	Luhn test of credit card numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
161	Command-line arguments	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
161	Determine if a string is numeric	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
161	Generate lower case ASCII alphabet	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
159	Factors of an integer	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
159	User input/Text	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
158	Stack	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
158	System time	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
157	Execute a system command	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
157	Hello world/Standard error	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
157	Zero to the zero power	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
156	ABC problem	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
156	Loop over multiple arrays simultaneously	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
155	Higher-order functions	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
155	Loops/Continue	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
155	Primality by trial division	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
154	Bitwise operations	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
153	Mutual recursion	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
153	Sorting algorithms/Quicksort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
152	Sorting algorithms/Bubble sort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
150	Check that file exists	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
150	Guess the number	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
150	Least common multiple	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
150	Read entire file	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
150	Remove duplicate elements	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
148	Balanced brackets	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
148	Create a file	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
148	Day of the week	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
148	Roman numerals/Encode	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
147	Count in octal	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
146	Ethiopian multiplication	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
146	File input/output	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
146	Sleep	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
145	Count occurrences of a substring	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
145	Happy numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
145	Mandelbrot set	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
144	Date format	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
144	Pascal's triangle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
144	Substring	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
142	Literals/Integer	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
142	Literals/String	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
142	Program termination	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
140	Strip a set of characters from a string	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
140	Variables	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
139	Compound data type	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
138	Function composition	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
138	Knuth shuffle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
137	Babbage problem	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
137	Pick random element	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
136	Letter frequency	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
136	Loops/Nested	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
136	N-queens problem	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
135	Averages/Root mean square	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
135	Include a file	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
135	Matrix transposition	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
135	Null object	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
135	String matching	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
134	Averages/Median	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
134	Sorting algorithms/Insertion sort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
133	Detect division by zero	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
133	Read a file line by line	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
132	Align columns	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
132	Anagrams	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
132	Look-and-say sequence	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
132	Return multiple values	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
132	String append	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
131	Binary search	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
131	File size	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
131	Hash from two arrays	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
131	Matrix multiplication	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
130	Associative array/Iteration	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
130	Flatten a list	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
129	Conway's Game of Life	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
129	Identity matrix	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
128	Delete a file	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
128	Find limit of recursion	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
128	Sierpinski triangle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
127	Case-sensitivity of identifiers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
127	Environment variables	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
127	Guess the number/With feedback	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
127	Harshad or Niven series	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
127	Levenshtein distance	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
127	Perfect numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
126	Comma quibbling	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
126	Haversine formula	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
126	Input loop	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
126	Real constants and functions	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
125	Roman numerals/Decode	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
124	Call a function	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
124	Ordered words	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
124	Run-length encoding	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
124	String interpolation (included)	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
124	Substring/Top and tail	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
123	Assertions	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
123	Classes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
123	Reverse words in a string	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
123	Strip whitespace from a string/Top and tail	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
122	Arithmetic/Complex	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
122	Bulls and cows	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
122	Horner's rule for polynomial evaluation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
121	Formatted numeric output	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
121	Multiplication tables	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
121	Pangram checker	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
121	Search a list	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
121	Variadic function	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
120	Averages/Pythagorean means	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
120	Combinations	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
120	HTTP	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
120	Rename a file	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
120	Sum multiples of 3 and 5	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
119	Create a two-dimensional array at runtime	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
119	Evaluate binomial coefficients	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
119	Sum digits of an integer	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
118	Infinity	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
117	Anonymous recursion	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
117	Calculating the value of e	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
117	Digital root	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
117	Hostname	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
117	Permutations	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
117	The Twelve Days of Christmas	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
116	Accumulator factory	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
116	Program name	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
116	String prepend	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
116	Temperature conversion	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
115	Catalan numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
115	Random numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
115	Zig-zag matrix	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
114	Middle three digits	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
114	Sequence of non-squares	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
113	24 game	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
113	Queue/Definition	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
113	Sorting algorithms/Merge sort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
113	Trigonometric functions	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
113	Vector products	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
112	Arbitrary-precision integers (included)	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
112	Evolutionary algorithm	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
112	Exceptions	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
112	Time a function	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
111	Amicable pairs	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
111	Arithmetic-geometric mean	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
110	Prime decomposition	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
110	Shell one-liner	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
110	Short-circuit evaluation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
109	Abundant, deficient and perfect number classifications	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
109	Enumerations	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
109	N'th	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
109	Regular expressions	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
108	Symmetric difference	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
107	Averages/Mode	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
107	Hello world/Newbie	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
106	Floyd's triangle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
106	Hofstadter Q sequence	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
106	Show ASCII table	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
106	Split a character string based on change of character	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
106	Tree traversal	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
105	Power set	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
104	Collections	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
104	Create an HTML table	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
104	Entropy	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
104	Map range	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
104	Nth root	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
104	Range expansion	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
104	Sorting algorithms/Selection sort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
104	Walk a directory/Non-recursively	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
103	Execute Brain****	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
103	Hamming numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
103	String comparison	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
103	Y combinator	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
102	Catamorphism	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
102	Exponentiation operator	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
102	MD5	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
101	Interactive programming (repl)	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
101	Last Friday of each month	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
101	Sort using a custom comparator	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
100	Address of a variable	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
100	Forward difference	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
100	Gray code	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
100	Random number generator (included)	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
99	Compare a list of strings	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
99	First-class functions	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
99	Langton's ant	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
99	Modular inverse	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
99	Number reversal game	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
99	Range extraction	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
99	Sorting algorithms/Cocktail sort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
98	CSV data manipulation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
98	Menu	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
98	Sierpinski carpet	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
98	Sorting algorithms/Bogosort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
98	Sorting algorithms/Heapsort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
98	Terminal control/Clear the screen	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
97	Averages/Simple moving average	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
97	Cumulative standard deviation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
97	Greatest subsequential sum	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
97	Inheritance/Single	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
97	JSON	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
97	Monty Hall problem	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
97	Number names	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
97	Repeat	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
97	Sorting algorithms/Gnome sort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
96	Abstract type	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
96	Find the last Sunday of each month	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
96	One-dimensional cellular automata	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
95	Additive primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
95	Anti-primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
95	Five weekends	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
94	Almost prime	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
94	Box the compass	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
94	Department numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
94	Here document	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
94	Literals/Floating point	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
94	Munchausen numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
94	Population count	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
94	Simple windowed application	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
93	Count in factors	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
93	Count the coins	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
93	Find common directory path	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
93	Non-decimal radices/Convert	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
93	Operator precedence	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
93	Playing cards	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
93	Read a specific line from a file	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
93	Set	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
93	Strip comments from a string	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
93	URL decoding	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
92	CRC-32	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
92	CSV to HTML translation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
92	Long multiplication	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
92	Multifactorial	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
92	Sort an array of composite structures	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
92	Window creation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
91	100 prisoners	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
91	Benford's law	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
91	Hello world/Line printer	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
91	Order two numerical lists	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
91	Queue/Usage	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
91	Terminal control/Ringing the terminal bell	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
91	Thue-Morse	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
91	Top rank per group	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
91	Word wrap	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
90	15 puzzle game	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
90	Bitmap	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
90	Closures/Value capture	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
90	Josephus problem	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
90	Proper divisors	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
90	SEDOLs	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
89	Dynamic variable names	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
89	Find the missing permutation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
89	Price fraction	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
89	Take notes on the command line	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
89	Walk a directory/Recursively	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
88	ISBN13 check digit	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
88	Introspection	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
88	Sorting algorithms/Shell sort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
88	Spiral matrix	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
88	URL encoding	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
87	Angle difference between two bearings	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
87	Call an object method	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
87	Convert seconds to compound duration	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
87	Extend your language	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
87	File modification time	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
87	Jewels and stones	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
87	Jump anywhere	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
87	Keyboard input/Obtain a Y or N response	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
87	Knapsack problem/0-1	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
87	Lucas-Lehmer test	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
87	Pi	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
87	Rep-string	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
87	Show the epoch	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
87	Special characters	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
86	Attractive numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
86	Fibonacci n-step number sequences	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
86	Monte Carlo methods	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
86	Old lady swallowed a fly	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
86	Pythagorean triples	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
86	Semordnilap	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
86	Singly-linked list/Traversal	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
86	Sort disjoint sublist	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
86	XML/Input	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
85	Averages/Mean angle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
85	Equilibrium index	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
85	Gamma function	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
85	Kaprekar numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
85	Man or boy test	①	②	③	④		⑥	⑦	⑧	⑨	⑩
85	Priority queue	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
85	Sorting algorithms/Counting sort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
85	Unicode variable names	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
84	Date manipulation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
84	Dragon curve	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
84	Linear congruential generator	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
84	Sequence of primes by trial division	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
84	Sockets	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
84	Soundex	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
83	Concurrent computing	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
83	I before E except after C	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
83	Jensen's Device	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
83	Pernicious numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
83	Phrase reversals	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
83	Vigenère cipher	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
83	Write entire file	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
82	Animation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
82	Calendar	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
82	Call a foreign-language function	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
82	Currying	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
82	Euler method	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
82	Exponentiation order	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
82	Flow-control structures	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
82	List comprehensions	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
82	Quaternion type	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
82	Rock-paper-scissors	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
82	Singly-linked list/Element definition	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
82	Sorting algorithms/Comb sort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
82	Web scraping	①	②	③	④		⑥	⑦	⑧	⑨	⑩
81	AKS test for primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
81	Anagrams/Deranged anagrams	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
81	Empty directory	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
81	Fractal tree	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
81	McNuggets problem	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
81	Narcissistic decimal number	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
81	Sort three variables	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
81	Strip control codes and extended characters from a string	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
81	Sudoku	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
81	Zeckendorf number representation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
80	Chinese remainder theorem	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
80	Damm algorithm	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
80	General FizzBuzz	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
80	Guess the number/With feedback (player)	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
80	Largest int from concatenated ints	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
80	Maze generation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
80	Read a configuration file	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
80	Roots of unity	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
80	Square but not cube	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
80	Stern-Brocot sequence	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
80	Trabb Pardo–Knuth algorithm	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
79	Bitmap/Bresenham's line algorithm	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
79	Catalan numbers/Pascal's triangle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
79	Draw a sphere	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
79	Four bit adder	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
79	Hello world/Web server	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
79	Non-decimal radices/Output	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
79	SHA-1	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
79	Self-describing numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
79	Van Eck sequence	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
78	Determine if a string is collapsible	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
78	Exceptions/Catch an exception thrown in a nested call	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
78	Execute HQ9+	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
78	Longest common prefix	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
78	Probabilistic choice	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
78	Semiprime	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
78	Sorting algorithms/Stooge sort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
78	Unix/ls	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
78	Write float arrays to a text file	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
77	Barnsley fern	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
77	Combinations with repetitions	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
77	Constrained random points on a circle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
77	Dutch national flag problem	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
77	Enforced immutability	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
77	Nested function	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
77	SHA-256	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
77	Special variables	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
77	Stair-climbing puzzle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
77	Van der Corput sequence	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
77	Word frequency	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
77	Yin and yang	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
76	Binary strings	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
76	Continued fraction	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
76	IBAN	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
76	Isqrt (integer square root) of X	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
76	Leonardo numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
76	Longest common subsequence	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
76	Magic 8-ball	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
76	Multiple distinct objects	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
76	Parsing/RPN calculator algorithm	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
76	Remove vowels from a string	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
75	Amb	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
75	Cartesian product of two or more lists	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
75	Chinese zodiac	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
75	Fast Fourier transform	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
75	Get system command output	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
75	Magic squares of odd order	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
75	Polymorphism	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
75	Sorting algorithms/Pancake sort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
75	Tau function	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
74	4-rings or 4-squares puzzle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
74	Arithmetic/Rational	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
74	Compile-time calculation	①	②	③	④	⑤	⑥	⑦	O	⑨	⑩
74	Determine if a string has all the same characters	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
74	Modular exponentiation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
74	Morse code	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
74	Numerical integration	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
74	RPG attributes generator	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
74	Runtime evaluation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
74	Two sum	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
74	Variable size/Get	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
73	Base64 decode data	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
73	Best shuffle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
73	Closest-pair problem	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
73	Draw a cuboid	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
73	Extract file extension	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
73	Long year	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
73	Named parameters	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
73	Smith numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
73	Subleq	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
73	Text processing/Max licenses in use	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
72	Abundant odd numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
72	Disarium numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
72	Euler's sum of powers conjecture	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
72	Factors of a Mersenne number	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
72	Host introspection	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
72	One of n lines in a file	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
72	Singly-linked list/Element insertion	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
72	Two identical strings	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
71	Base64 encode data	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
71	CUSIP	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
71	Circles of given radius through two points	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
71	Emirp primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
71	HTTPS	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
71	Integer overflow	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
71	Memory allocation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
71	Mouse position	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
71	Primality by Wilson's theorem	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
71	Remove lines from a file	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
71	Roots of a function	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
71	Tic-tac-toe	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
71	Write language name in 3D ASCII	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
70	9 billion names of God the integer	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
70	Cholesky decomposition	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
70	Documentation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
70	Fork	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
70	Miller–Rabin primality test	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
70	Plot coordinate pairs	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
70	Reduced row echelon form	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
70	Sort stability	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
70	Tau number	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
69	Animate a pendulum	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
69	Arithmetic evaluation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
69	Averages/Mean time of day	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
69	Draw a clock	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
69	Draw a pixel	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
69	Gapful numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
69	Hofstadter-Conway $10,000 sequence	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
69	Longest common substring	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
69	Loops/Increment loop index within loop body	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
69	Non-decimal radices/Input	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
69	Runge-Kutta method	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
69	Test a function	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
69	Undefined values	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
69	Words containing "the" substring	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
69	XML/Output	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
68	Copy stdin to stdout	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
68	Globally replace text in several files	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
68	Knight's tour	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
68	Optional parameters	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
68	Quickselect algorithm	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
68	Roots of a quadratic function	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
68	Sorting algorithms/Sleep sort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
68	Terminal control/Display an extended character	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
67	2048	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
67	Code Golf: Code Golf	①	②	③	④	⑤	⑥	⑦	⑧	⑨
67	Dinesman's multiple-dwelling problem	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
67	FASTA format	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
67	Farey sequence	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
67	Fibonacci word	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
67	Inheritance/Multiple	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
67	JortSort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
67	Ludic numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
67	Maximum triangle path sum	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
67	Pascal matrix generation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
67	Ternary logic	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
67	Truncatable primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
67	Unicode strings	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
67	Vector	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
66	Bitmap/Write a PPM file	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
66	Cantor set	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
66	Deal cards for FreeCell	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
66	Fusc sequence	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
66	Generator/Exponential	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
66	Knapsack problem/Continuous	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
66	Knapsack problem/Unbounded	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
66	Left factorials	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
66	Smallest square that begins with n	①	②	③	④	⑤	⑥	⑦	⑧	⑨
66	Totient function	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
65	24 game/Solve	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
65	Archimedean spiral	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
65	Brownian tree	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
65	DNS query	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
65	Days between dates	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
65	Halt and catch fire	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
65	Horizontal sundial calculations	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
65	Nim game	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
65	Sattolo cycle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
65	Sort numbers lexicographically	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
65	Sorting algorithms/Permutation sort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
64	Add a variable to a class instance at runtime	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
64	Convert decimal number to rational	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
64	Define a primitive data type	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
64	Dijkstra's algorithm	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
64	Discordian date	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
64	Huffman coding	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
64	Iterated digits squaring	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
64	Largest proper divisor of n	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
64	Loops/With multiple ranges	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
64	Matrix-exponentiation operator	①	②	③	④	⑤	⑥	⑦	⑧	⑨	O
64	Multisplit	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
64	Random number generator (device)	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
64	Scope modifiers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
64	Sum of divisors	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
64	Sum of first n cubes	①	②	③	④	⑤	⑥	⑦	⑧	⑨
64	Terminal control/Coloured text	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
64	Truncate a file	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
64	User input/Graphical	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
64	Validate International Securities Identification Number	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
63	ABC words	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
63	Associative array/Merging	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
63	Extreme floating point values	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
63	Find the intersection of two lines	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
63	Kernighans large earthquake problem	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
63	LZW compression	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
63	Odd word problem	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
63	Partial function application	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
63	Strip block comments	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
62	Abbreviations, automatic	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
62	Bernoulli numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
62	Compare length of two strings	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
62	Determine if a string has all unique characters	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
62	Doubly-linked list/Element definition	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
62	Find words which contains more than 3 e vowels	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
62	Grayscale image	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
62	Hash join	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
62	Mad Libs	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
62	Password generator	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
62	Pointers and references	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
62	Stem-and-leaf plot	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
62	Topological sort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
61	Egyptian division	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
61	First-class functions/Use numbers analogously	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
61	Inverted syntax	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
61	Keyboard input/Keypress check	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
61	Pig the dice game	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
61	Search a list of records	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
61	Sierpinski triangle/Graphical	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
61	Sorting algorithms/Bead sort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
61	Statistics/Basic	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
61	Unbias a random generator	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
61	Universal Turing machine	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
61	Water collected between towers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
60	Bell numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
60	Chaos game	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
60	Forest fire	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
60	Fractran	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
60	Kronecker product	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
60	Longest increasing subsequence	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
60	Perfect shuffle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
60	Runtime evaluation/In an environment	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
60	Shoelace formula for polygonal area	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
60	Singleton	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
60	Tokenize a string with escaping	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
59	Bioinformatics/base count	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
59	Call a function in a shared library	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
59	Delegates	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
59	Handle a signal	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
59	Heronian triangles	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
59	Hofstadter Figure-Figure sequences	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
59	Holidays related to Easter	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
59	Jaro similarity	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
59	Modulinos	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
59	Naming conventions	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
59	Non-continuous subsequences	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
59	Perfect totient numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
59	Rosetta Code/Rank languages by popularity	①	②	③	④		⑥	⑦	⑧	⑨	⑩
59	Set consolidation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
59	Stack traces	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
59	Wireworld	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
58	Determinant and permanent	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
58	Determine if a string is squeezable	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
58	Gaussian elimination	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
58	Generate Chess960 starting position	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
58	Rate counter	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
58	Recaman's sequence	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
58	Seven-sided dice from five-sided dice	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
58	Strange plus numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
58	Sum of the digits of n is substring of n	①	②	③	④	⑤	⑥	⑦	⑧	⑨
58	Text between	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
58	XML/XPath	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
57	Average loop length	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
57	Count how many vowels and consonants occur in a string	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
57	Extensible prime generator	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
57	Find words which contain all the vowels	①	②	③	④	⑤	⑥	⑦	⑧	⑨
57	Longest string challenge	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
57	Matrix with two diagonals	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
57	Odd and square numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨
57	Polynomial regression	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
57	Terminal control/Cursor positioning	①	②	③	④	⑤	⑥	⑦	⑧	⑨
57	The Name Game	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
57	XML/DOM serialization	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
57	Zebra puzzle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
56	10001th prime	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
56	Casting out nines	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
56	Currency	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
56	Idiomatically determine all the lowercase and uppercase letters	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
56	Mertens function	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
56	Move-to-front algorithm	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
56	Munching squares	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
56	Numbers divisible by their individual digits, but not by the product of their digits.	①	②	③	④	⑤	⑥	⑦	⑧	⑨
56	Send email	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
56	Show the (decimal) value of a number of 1s appended with a 3, then squared	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
56	Spinning rod animation/Text	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
56	Stable marriage problem	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
56	Substitution cipher	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
56	Synchronous concurrency	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
56	Text processing/2	①	②	③	④		⑥	⑦	⑧	⑨	⑩
56	Ulam spiral (for primes)	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
55	Aliquot sequence classifications	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
55	Chowla numbers	①	②	③	④		⑥	⑦	⑧	⑨	⑩
55	Digital root/Multiplicative digital root	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
55	Doubly-linked list/Element insertion	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
55	Execute a Markov algorithm	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
55	Hilbert curve	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
55	MAC vendor lookup	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
55	Musical scale	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
55	Taxicab numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
54	21 game	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
54	Append a record to the end of a text file	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
54	Convex hull	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
54	Dining philosophers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
54	Doubly-linked list/Traversal	①	②	③	④	⑤		⑦	⑧	⑨	⑩
54	Elementary cellular automaton	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
54	GUI component interaction	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
54	Greyscale bars/Display	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
54	Permutations/Derangements	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
54	Text processing/1	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
53	Base 16 numbers needing a to f	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
53	Colour bars/Display	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
53	Doubly-linked list/Definition	①	②	③	④	⑤		⑦	⑧	⑨	⑩
53	Find prime n such that reversed n is also prime	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
53	Find words whose first and last three letters are equal	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
53	Floyd-Warshall algorithm	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
53	History variables	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
53	Image noise	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
53	Last letter-first letter	①	②	③	④		⑥	⑦	⑧	⑨	⑩
53	Make directory path	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
53	Problem of Apollonius	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
53	Start from a main routine	①	②	③	④	⑤	⑥	⑦	O	⑨	O
52	Approximate equality	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
52	Combinations and permutations	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
52	Golden ratio/Convergence	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
52	Humble numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
52	Lah numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
52	Metaprogramming	①	②	③	④	⑤	⑥	⑦	⑧	⑨	O
52	Polymorphic copy	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
52	Polynomial long division	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
52	Pseudo-random numbers/Middle-square method	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
52	Respond to an unknown method call	①	②	③	④	⑤	⑥	⑦	⑧	⑨	O
52	Send an unknown method call	①	②	③	④	⑤	⑥	O	⑧	⑨	⑩
52	Strange numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
52	Sudan function	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
52	UTF-8 encode and decode	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
52	Unique characters	①	②	③	④	⑤	⑥	⑦	⑧	⑨
52	Variable size/Set	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
52	Verify distribution uniformity/Naive	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
51	Abbreviations, easy	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
51	Append numbers at same position in strings	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
51	Ascending primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
51	Bitmap/Flood fill	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
51	Brazilian numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
51	Find prime numbers of the form n*n*n+2	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
51	Flipping bits game	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
51	Nice primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
51	Product of divisors	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
51	Shift list elements to left by 3	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
51	Sorting algorithms/Radix sort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
51	Visualize a tree	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
50	Bitmap/Midpoint circle algorithm	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
50	Bitmap/Read a PPM file	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
50	Bulls and cows/Player	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
50	Colour pinstripe/Display	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
50	Continued fraction/Arithmetic/Construct from rational number	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
50	Coprimes	①	②	③	④	⑤	⑥	⑦	⑧	⑨
50	Deepcopy	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
50	Display a linear combination	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
50	Element-wise operations	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
50	Euler's identity	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
50	Feigenbaum constant calculation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
50	Find square difference	①	②	③	④	⑤	⑥		⑧	⑨	⑩
50	Fivenum	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
50	Long primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
50	Magnanimous numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
50	Parsing/Shunting-yard algorithm	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
50	Permutations by swapping	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
50	Sequence: smallest number with exactly n divisors	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
50	Sorting Algorithms/Circle Sort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
50	Sparkline in unicode	①	②	③	④		⑥	⑦	⑧	⑨	⑩
50	Special divisors	①	②	③	④	⑤	⑥	⑦	⑧	⑨
50	Subtractive generator	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
50	Sum to 100	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
50	Truth table	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
50	Twelve statements	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
50	Yellowstone sequence	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
49	Active object	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
49	Arithmetic numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
49	Arithmetic-geometric mean/Calculate Pi	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
49	Cheryl's birthday	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
49	Color of a screen pixel	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
49	Cycle detection	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
49	Determine if only one instance is running	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
49	Doomsday rule	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
49	Eban numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
49	File extension is in extensions list	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
49	Find words with alternating vowels and consonants	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
49	Julia set	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
49	Knapsack problem/Bounded	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
49	Loops/Wrong ranges	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
49	Narcissist	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
49	OpenGL	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
49	Palindrome dates	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
49	Sailors, coconuts and a monkey problem	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
49	Sort a list of object identifiers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
49	Steady squares	①	②	③	④	⑤	⑥	⑦	⑧	⑨
49	Table creation/Postal addresses	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
49	Terminal control/Dimensions	①	②	③	④	⑤	⑥	⑦	⑧	⑨
48	Abbreviations, simple	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
48	Alternade words	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
48	Balanced ternary	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
48	Brace expansion	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
48	Cousin primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
48	Echo server	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
48	Factorions	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
48	GUI/Maximum window dimensions	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
48	Input/Output for pairs of numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
48	Keyboard input/Flush the keyboard buffer	①	②	③	④	⑤	⑥	⑦	⑧	⑨
48	Largest number divisible by its digits	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
48	Longest common suffix	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
48	Mersenne primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
48	Safe primes and unsafe primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
48	Secure temporary file	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
48	Sorting algorithms/Patience sort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
48	Speech synthesis	①	②	③	④	⑤	⑥	⑦	⑧	⑨
48	Terminal control/Hiding the cursor	①	②	③	④	⑤	⑥	⑦	⑧	⑨
47	Chaocipher	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
47	Digit fifth powers	①	②	③	④	⑤	⑥		⑧	⑨	⑩
47	Extra primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
47	Fairshare between two and more	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
47	Find squares n where n+1 is prime	①	②	③	④	⑤	⑥	⑦	⑧	⑨
47	Find the intersection of a line with a plane	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
47	Four is magic	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
47	Hickerson series of almost integers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
47	Honaker primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
47	Integer roots	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
47	MD5/Implementation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
47	Magic squares of doubly even order	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
47	Numbers with prime digits whose sum is 13	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
47	Pascal's triangle/Puzzle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
47	Primorial numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
47	Pythagorean quadruples	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
47	Read a file character by character/UTF8	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
47	Rosetta Code/Count examples	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
47	Scope/Function names and labels	①	②	③	④	⑤	⑥	⑦	⑧	⑨
47	Sutherland-Hodgman polygon clipping	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
47	Triplet of three numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨
47	Type detection	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
46	Atomic updates	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
46	Bitwise IO	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
46	Carmichael 3 strong pseudoprimes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
46	Compiler/lexical analyzer	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
46	Cuban primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
46	Frobenius numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
46	Kahan summation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
46	Koch curve	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
46	Numerical integration/Adaptive Simpson's method	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
46	Parametric polymorphism	①	②	③	④	⑤	O	⑦	O	⑨	⑩
46	Partition an integer x into n primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
46	Permutations with repetitions	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
46	Primes whose sum of digits is 25	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
46	Ranking methods	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
46	Sequence: smallest number greater than previous term with exactly n divisors	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
46	Summarize and say sequence	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
45	Church numerals	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
45	Common list elements	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
45	Cramer's rule	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
45	Find palindromic numbers in both binary and ternary bases	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
45	First 9 prime Fibonacci number	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
45	Harmonic series	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
45	Input/Output for lines of text	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
45	Inverted index	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
45	Maximum difference between adjacent elements of list	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
45	Numbers with same digit set in base 10 and base 16	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
45	Parallel calculations	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
45	Percentage difference between images	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
45	Prime conspiracy	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
45	S-expressions	①	②	③	④		⑥	⑦	⑧	⑨	⑩
45	Solve the no connection puzzle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
45	Sort the letters of string in alphabetical order	①	②	③	④	⑤	⑥	⑦	⑧	⑨
45	Sorting algorithms/Strand sort	①	②	③	④		⑥	⑦	⑧	⑨	⑩
45	Sum of elements below main diagonal of matrix	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
45	Terminal control/Inverse video	①	②	③	④	⑤	⑥	⑦	⑧	⑨
45	Test integerness	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
45	Vampire number	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
45	Variable-length quantity	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
45	Voronoi diagram	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
44	Abelian sandpile model	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
44	Calendar - for "REAL" programmers	①	②	③	④	⑤	⑥	⑦	O	⑨	O
44	Change e letters to i in words	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
44	Check output device is a terminal	①	②	③	④	⑤	⑥	⑦	⑧	⑨
44	Circular primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
44	Function prototype	①	②	③	④	⑤	⑥	⑦	O	⑨	⑩
44	Implicit type conversion	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
44	Knuth's algorithm S	①	②	③	④		⑥	⑦	⑧	⑨	⑩
44	Maze solving	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
44	Modular arithmetic	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
44	Mosaic matrix	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
44	Numbers in base-16 representation that cannot be written with decimal digits	①	②	③	④	⑤	⑥	⑦	⑧	⑨
44	Palindromic primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨
44	Penney's game	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
44	Pinstripe/Display	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
44	Statistics/Normal distribution	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
44	Topswops	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
43	Arithmetic derivative	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
43	Bitmap/Bézier curves/Cubic	①	②	③	④	⑤		⑦	⑧	⑨	⑩
43	Dice game probabilities	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
43	Diversity prediction theorem	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
43	Fibonacci word/fractal	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
43	Find minimum number of coins that make a given value	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
43	Find words which contain the most consonants	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
43	GUI enabling/disabling of controls	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
43	LU decomposition	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
43	Machine code	①	②	③	④	⑤		⑦	⑧	⑨
43	Metronome	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
43	Minimum multiple of m where digital sum equals m	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
43	Minimum number of cells after, before, above and below NxN squares	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
43	Minimum numbers of three lists	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
43	Multiple regression	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
43	Numbers whose binary and ternary digit sums are prime	①	②	③	④	⑤	⑥	⑦	⑧	⑨
43	O'Halloran numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
43	Pathological floating point problems	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
43	Poker hand analyser	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
43	Pythagoras tree	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
43	QR decomposition	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
43	Ray-casting algorithm	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
43	Rosetta Code/Find bare lang tags	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
43	Word wheel	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
43	Xiaolin Wu's line algorithm	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
42	Angles (geometric), normalization and conversion	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
42	Deceptive numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
42	Determine if two triangles overlap	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
42	Draw a rotating cube	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
42	Events	①	②	③	④	⑤	⑥	⑦	⑧	⑨
42	Exactly three adjacent 3 in lists	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
42	Find first missing positive	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
42	Find if a point is within a triangle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
42	Jacobi symbol	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
42	Length of an arc between two angles	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
42	Lychrel numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
42	Metered concurrency	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
42	Multi-dimensional array	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
42	Möbius function	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
42	Numerical integration/Gauss-Legendre Quadrature	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
42	Old Russian measure of length	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
42	Order disjoint list items	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
42	Parsing/RPN to infix conversion	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
42	Permutation test	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
42	Safe and Sophie Germain primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨
42	Smarandache prime-digital sequence	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
42	Strange unique prime triplets	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
42	Twin primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
42	Unique characters in each string	①	②	③	④	⑤	⑥	⑦	⑧	⑨
42	Weird numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
42	Words from neighbour ones	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
42	Zumkeller numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
41	AVL tree	①	②	③	④	⑤		⑦	⑧	⑨	⑩
41	Apply a digital filter (direct form II transposed)	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
41	Bitmap/Bézier curves/Quadratic	①	②	③	④	⑤		⑦	⑧	⑨	⑩
41	Break OO privacy	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
41	Burrows–Wheeler transform	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
41	Calkin-Wilf sequence	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
41	Canonicalize CIDR	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
41	Common sorted list	①	②	③	④	⑤	⑥	⑦	⑧	⑨
41	Constrained genericity	①	②	③	④	⑤	O	⑦	O	⑨	⑩
41	Create a file on magnetic tape	①	②	③	④	⑤		⑦	⑧	⑨	⑩
41	Entropy/Narcissist	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
41	First power of 2 that has leading decimal digits of 12	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
41	Largest prime factor	①	②	③	④	⑤	⑥		⑧	⑨	⑩
41	Object serialization	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
41	Perlin noise	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
41	Positive decimal integers with the digit 1 occurring exactly twice	①	②	③	④	⑤	⑥	⑦	⑧	⑨
41	Set puzzle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
41	Solve a Hidato puzzle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
41	Square-free integers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
41	Subset sum problem	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
41	Successive prime differences	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
40	Algebraic data types	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
40	Bin given limits	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
40	Changeable words	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
40	Conjugate transpose	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
40	Create an object at a given address	①	②	③	④	⑤	⑥	⑦	O	⑨	O
40	Cullen and Woodall numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
40	Day of the week of Christmas and New Year	①	②	③	④	⑤	⑥	⑦	⑧		⑩
40	Erdős-primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
40	Four sides of square	①	②	③	④	⑤	⑥	⑦	⑧	⑨
40	Gauss-Jordan matrix inversion	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
40	Jacobsthal numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
40	Long literals, with continuations	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
40	Mayan numerals	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
40	Minesweeper game	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
40	Motzkin numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
40	Negative base numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
40	Neighbour primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨
40	Numbers in base 10 that are palindromic in bases 2, 4, and 16	①	②	③	④	⑤	⑥	⑦	⑧	⑨
40	Numbers with equal rises and falls	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
40	Parse command-line arguments	①	②	③	④	⑤	⑥	⑦	⑧	⑨
40	Pentagram	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
40	Polyspiral	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
40	Product of min and max prime factors	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
40	Rosetta Code/Find unimplemented tasks	①	②	③	④	⑤	⑥	⑦	⑧	⑨
40	Strong and weak primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
40	Summarize primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
40	Textonyms	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
39	Biorhythms	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
39	Color wheel	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
39	Death Star	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
39	Decimal floating point number to binary	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
39	Determine sentence type	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
39	Duffinian numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
39	Esthetic numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
39	Euler's constant 0.5772...	①	②	③	④	⑤	⑥	⑦	⑧		⑩
39	Find first and last set bit of a long integer	①	②	③	④	⑤	⑥		⑧	⑨	⑩
39	First perfect square in base n with n unique digits	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
39	Forbidden numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
39	Generate random numbers without repeating a value	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
39	Giuga numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
39	Mian-Chowla sequence	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
39	Multiline shebang	①	②	③	④	⑤	⑥	⑦	⑧	⑨
39	Mutex	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
39	Odd words	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
39	Peano curve	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
39	Pragmatic directives	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
39	RIPEMD-160	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
39	RSA code	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
39	Reflection/List properties	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
39	Sorting algorithms/Cycle sort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
39	Superellipse	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
39	Terminal control/Cursor movement	①	②	③	④	⑤	⑥	⑦	⑧	⑨
39	Terminal control/Unicode output	①	②	③	④	⑤	⑥	⑦	⑧
38	Anadromes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
38	Bacon cipher	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
38	Check input device is a terminal	①	②	③	④	⑤	⑥	⑦	⑧	⑨	O
38	Deconvolution/1D	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
38	Descending primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
38	Distinct power numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
38	Faulhaber's triangle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
38	Galton box animation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
38	Greedy algorithm for Egyptian fractions	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
38	Law of cosines - triples	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
38	MD4	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
38	Ordered partitions	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
38	Padovan sequence	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
38	Partition function P	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
38	Pell's equation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
38	Primes with digits in nondecreasing order	①	②	③	④	⑤	⑥	⑦	⑧	⑨
38	Ramer-Douglas-Peucker line simplification	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
38	Range consolidation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
38	Sum and product puzzle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
38	Two's complement	①	②	③	④	⑤	⑥	⑦	⑧		⑩
38	Wieferich primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
37	Chemical calculator	①	②	③	④		⑥	⑦	⑧	⑨	⑩
37	Concatenate two primes is also prime	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
37	Deming's funnel	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
37	Factorial primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
37	HTTPS/Authenticated	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
37	Increasing gaps between consecutive Niven numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
37	Monads/Maybe monad	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
37	Next highest int from digits	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
37	Numbers which are the cube roots of the product of their proper divisors	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
37	Parameterized SQL statement	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
37	Piprimes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
37	Pseudo-random numbers/PCG32	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
37	Sexy primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
37	Simple database	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
37	Sleeping Beauty problem	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
37	Sum of primes in odd positions is prime	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
37	Sylvester's sequence	①	②	③	④	⑤	⑥	⑦	⑧	⑨
37	Terminal control/Preserve screen	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
37	Topic variable	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
37	URL parser	①	②	③	④		⑥	⑦	⑧	⑨	⑩
37	Use another language to call a function	①	②		④	⑤		⑦	⑧	⑨	⑩
37	Word break problem	①	②	③	④		⑥	⑦	⑧	⑨	⑩
36	ABC correlation	①	②	③	④	⑤			⑧		⑩
36	Bitmap/Histogram	①	②	③	④	⑤		⑦	⑧	⑨	⑩
36	Chebyshev coefficients	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
36	De Bruijn sequences	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
36	Decision tables	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
36	FTP	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
36	Faulhaber's formula	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
36	Find adjacent primes which differ by a square integer	①	②	③	④	⑤	⑥		⑧	⑨	⑩
36	Idiomatically determine all the characters that can be used for symbols	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
36	Klarner-Rado sequence	①	②	③	④	⑤	⑥	⑦	⑧		⑩
36	Largest five adjacent number	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
36	Last list item	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
36	Odd squarefree semiprimes	①	②	③	④	⑤	⑥	⑦	⑧	⑨
36	Prime triplets	①	②	③	④	⑤	⑥	⑦	⑧	⑨
36	Random Latin squares	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
36	Reflection/List methods	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
36	Resistor mesh	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
36	Selectively replace multiple instances of a character within a string	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
36	Smallest multiple	①	②	③	④	⑤	⑥		⑧	⑨
36	Super-d numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
36	Verify distribution uniformity/Chi-squared test	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
36	Video display modes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
36	Write to Windows event log	①	②	③	④	⑤	⑥		⑧	⑨	⑩
35	Almkvist-Giullera formula for pi	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
35	Bioinformatics/Sequence mutation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
35	Cistercian numerals	①	②	③	④		⑥	⑦	⑧	⑨	⑩
35	Curzon numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
35	Executable library	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
35	Hex words	①	②	③	④	⑤	⑥	⑦	⑧		⑩
35	Hunt the Wumpus	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
35	Idoneal numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
35	Kronecker product based fractals	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
35	Memory layout of a data structure	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
35	Mind boggling card trick	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
35	Minimum positive multiple in base 10 using only 0 and 1	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
35	Multiplicative order	①	②	③	④		⑥	⑦	⑧	⑨	⑩
35	N-smooth numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
35	Nonoblock	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
35	Parallel brute force	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
35	Pierpont primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
35	Prime numbers which contain 123	①	②	③	④	⑤	⑥	⑦	⑧	⑨
35	Reverse the order of lines in a text file while preserving the contents of each line	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
35	Set of real numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
35	Sierpinski arrowhead curve	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
35	Sierpinski pentagon	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
35	Stirling numbers of the first kind	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
35	Stirling numbers of the second kind	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
35	Straddling checkerboard	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
35	Summation of primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨
35	Unprimeable numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
35	Window creation/X11	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
34	Birthday problem	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
34	Bitcoin/address validation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
34	Brilliant numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
34	Collect and sort square numbers in ascending order from three lists	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
34	Coprime triplets	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
34	Cubic special primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
34	Cut a rectangle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
34	Execute SNUSP	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
34	Fermat numbers	①	②	③	④		⑥	⑦	⑧	⑨	⑩
34	Finite state machine	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
34	First class environments	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
34	Generate random chess position	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
34	Legendre prime counting function	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
34	Merge and aggregate datasets	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
34	N-grams	①	②	③	④	⑤	⑥	⑦	⑧		⑩
34	Prime words	①	②	③	④	⑤	⑥	⑦	⑧	⑨
34	Riordan numbers	①	②	③	④	⑤	⑥	⑦	⑧		⑩
34	Special neighbor primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨
34	State name puzzle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
34	Sum of square and cube digits of an integer are primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨
34	Teacup rim text	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
34	Total circles area	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
34	Zhang-Suen thinning algorithm	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
33	Checkpoint synchronization	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
33	Compiler/virtual machine interpreter	①	②	③	④		⑥	⑦	⑧	⑨	⑩
33	Decorate-sort-undecorate idiom	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
33	Euclidean rhythm	①	②	③	④	⑤	⑥		⑧	⑨	⑩
33	Go Fish	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
33	Honeycombs	①	②	③		⑤	⑥	⑦	⑧	⑨	⑩
33	Numbers whose count of divisors is prime	①	②	③	④	⑤	⑥	⑦		⑨	⑩
33	Own digits power sum	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
33	Plasma effect	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
33	Quadrat special primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
33	Sorting algorithms/Cocktail sort with shifting bounds	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
33	Table creation	①	②	③	④	⑤	⑥	⑦	⑧	⑨
33	Update a configuration file	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
32	15 puzzle solver	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
32	Arena storage pool	①	②	③	④	⑤		⑦	⑧	⑨	⑩
32	Audio alarm	①	②	③	④	⑤		⑦	⑧	⑨	⑩
32	Chat server	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
32	Cyclops numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
32	Find largest left truncatable prime in a given base	①	②	③	④		⑥	⑦	⑧	⑨	⑩
32	Inventory sequence	①	②	③	④	⑤	⑥	⑦	⑧		⑩
32	Keyboard macros	①	②	③	④		⑥	⑦	⑧	⑨	⑩
32	Largest product in a grid	①	②	③	④	⑤	⑥		⑧	⑨	⑩
32	Longest substrings without repeating characters	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
32	Magic constant	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
32	Monads/List monad	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
32	Natural sorting	①	②	③	④		⑥	⑦	⑧	⑨	⑩
32	Numeric error propagation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
32	Numeric separator syntax	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
32	Pancake numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
32	Play recorded sounds	①	②	③		⑤		⑦	⑧	⑨	⑩
32	Primes which contain only one odd digit	①	②	③	④	⑤	⑥	⑦	⑧	⑨
32	Primes whose first and last number is 3	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
32	Ramsey's theorem	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
32	Rosetta Code/Fix code tags	①	②	③	④		⑥	⑦	⑧	⑨	⑩
32	Snake and ladder	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
32	Solve a Holy Knight's tour	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
32	Spelling of ordinal numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
32	Stream merge	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
32	Sunflower fractal	①	②	③	④	⑤	⑥	⑦	⑧	⑨
32	Thiele's interpolation formula	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
32	UPC	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
31	A* search algorithm	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
31	Bifid cipher	①	②	③	④	⑤	⑥	⑦	⑧		⑩
31	Calmo numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
31	Card shuffles	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
31	Check Machin-like formulas	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
31	Colorful numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
31	Conjugate a Latin verb	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
31	Consecutive primes with ascending or descending differences	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
31	De Polignac numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
31	Double Twin Primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
31	Euclid-Mullin sequence	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
31	Fixed length records	①	②	③	④	⑤	⑥	⑦	⑧	⑨
31	Formal power series	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
31	Intersecting number wheels	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
31	Magic squares of singly even order	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
31	Next special primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
31	Orbital elements	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
31	Order by pair comparisons	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
31	Palindromic gapful numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
31	Palindromic primes in base 16	①	②	③	④	⑤	⑥	⑦	⑧	⑨
31	Pseudo-random numbers/Splitmix64	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
31	Safe addition	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
31	Same fringe	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
31	Shortest common supersequence	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
31	Superpermutation minimisation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
31	The ISAAC cipher	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
31	Tonelli-Shanks algorithm	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
31	Ulam numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
31	Welch's t-test	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
31	Wordle comparison	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
31	World Cup group stage	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
30	Abelian sandpile model/Identity	①	②	③	④	⑤		⑦	⑧	⑨	⑩
30	Active Directory/Connect	①	②	③	④	⑤	⑥		⑧	⑨	⑩
30	Blum integer	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
30	Composite numbers k with no single digit factors whose factors are all substrings of k	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
30	Continued fraction/Arithmetic/G(matrix ng, continued fraction n)	①	②	③	④	⑤		⑦	⑧	⑨	⑩
30	EKG sequence convergence	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
30	Elementary cellular automaton/Random number generator	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
30	Exponentiation with infix operators in (or operating on) the base	①	②	③	④	⑤	⑥	⑦	⑧	⑨
30	Fraction reduction	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
30	Function frequency	①	②	③	④	⑤	⑥	⑦	⑧	⑨
30	Getting the number of decimal places	①	②	③	④	⑤	⑥		⑧	⑨	⑩
30	Kolakoski sequence	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
30	Kosaraju	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
30	Largest difference between adjacent primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨
30	Matrix chain multiplication	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
30	Parse an IP Address	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
30	Percolation/Mean run density	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
30	Pseudo-random numbers/Xorshift star	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
30	Reverse the gender of a string	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
30	Smallest power of 6 whose decimal expansion contains n	①	②	③	④	⑤	⑥	⑦	⑧	⑨
30	Solve a Numbrix puzzle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
30	Sort primes from list to a list	①	②	③	④	⑤	⑥	⑦	⑧	⑨
30	Sum data type	①	②	③	④	⑤	⑥	⑦		⑨	⑩
30	Sum of two adjacent numbers are primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨
29	Achilles numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
29	Base58Check encoding	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
29	Camel case and snake case	①	②	③	④	⑤	⑥	⑦	⑧		⑩
29	Cipolla's algorithm	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
29	Commatizing numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
29	Distributed programming	①	②	③	④	⑤	⑥	⑦	⑧	⑨
29	File size distribution	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
29	Image convolution	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
29	Levenshtein distance/Alignment	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
29	Linux CPU utilization	①	②	③	④		⑥	⑦	⑧	⑨	⑩
29	List rooted trees	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
29	Lucky and even lucky numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
29	Make a backup file	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
29	Nautical bell	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
29	Padovan n-step number sequences	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
29	Paraffins	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
29	Permutations/Rank of a permutation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
29	Permuted multiples	①	②	③	④	⑤	⑥	⑦		⑨	⑩
29	Radical of an integer	①	②	③	④	⑤	⑥	⑦	⑧		⑩
29	Rare numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
29	Record sound	①	②	③	④	⑤		⑦	⑧	⑨	⑩
29	Self numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
29	Sequence of primorial primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
29	Snake	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
29	Soloway's recurring rainfall	①	②	③	④	⑤	⑥	⑦	⑧		⑩
29	Wagstaff primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
29	Wilson primes of order n	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
29	Yahoo! search interface	①	②	③	④		⑥	⑦	⑧	⑨	⑩
28	ASCII art diagram converter	①	②	③	④		⑥	⑦	⑧	⑨	⑩
28	Elliptic curve arithmetic	①	②	③	④		⑥	⑦	⑧	⑨	⑩
28	Goldbach's comet	①	②	③	④	⑤	⑥	⑦	⑧		⑩
28	K-means++ clustering	①	②	③	④			⑦	⑧	⑨	⑩
28	Markov chain text generator	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
28	Mastermind	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
28	Metallic ratios	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
28	N-body problem	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
28	Pisano period	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
28	Playfair cipher	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
28	Print itself	①	②	③	④	⑤	⑥	⑦	⑧	⑨
28	RCRPG	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
28	Round-robin tournament schedule	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
28	Sine wave	①	②	③	④	⑤	⑥	⑦	⑧	⑨
28	Solve triangle solitaire puzzle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
28	The sieve of Sundaram	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
28	Vigenère cipher/Cryptanalysis	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
28	Vogel's approximation method	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
28	Zeckendorf arithmetic	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
27	Assertions in design by contract	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
27	K-d tree	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
27	Main step of GOST 28147-89	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
27	Meissel–Mertens constant	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
27	Modified random distribution	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
27	Monads/Writer monad	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
27	Nested templated data	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
27	Permutations with some identical elements	①	②	③	④	⑤	⑥	⑦	⑧	⑨
27	Prime numbers p for which the sum of primes less than or equal to p is prime	①	②	③	④	⑤	⑥	⑦	⑧	⑨
27	Safe mode	①	②	③	④	⑤	⑥	⑦		⑨
27	Separate the house number from the street name	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
27	Sierpinski curve	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
27	Sierpinski square curve	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
27	Simulate input/Keyboard	①	②		④		⑥	⑦	⑧	⑨	⑩
27	Solve a Hopido puzzle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
27	Special factorials	①	②	③	④	⑤	⑥	⑦	⑧	⑨
27	Substring primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨
27	Word ladder	①	②	③	④		⑥	⑦	⑧	⑨	⑩
26	Hough transform	①	②	③	④		⑥	⑦	⑧	⑨	⑩
26	Inconsummate numbers in base 10	①	②	③	④	⑤	⑥	⑦	⑧		⑩
26	Index finite lists of positive integers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
26	Joystick position	①	②	③	④	⑤			⑧	⑨
26	Matrix digital rain	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
26	Median filter	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
26	Minimum primes	①	②	③	④	⑤	⑥	⑦		⑨	⑩
26	Names to numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
26	Native shebang	①	②	③	④	⑤	⑥	⑦	⑧	⑨
26	Ormiston pairs	①	②	③	④	⑤	⑥	⑦	⑧	⑨
26	Periodic table	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
26	Print debugging statement	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
26	Rainbow	①	②	③	④	⑤	⑥		⑧	⑨	⑩
26	SOAP	①	②	③	④	⑤	⑥		⑧	⑨
26	Sphenic numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
26	Variable declaration reset	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
26	Vibrating rectangles	①	②	③	④	⑤	⑥	⑦	⑧	⑨
26	Zsigmondy numbers	①	②	③	④	⑤	⑥	⑦	⑧		⑩
25	Active Directory/Search for a user	①	②	③	④	⑤	⑥		⑧	⑨	⑩
25	Addition chains	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
25	Air mass	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
25	Bilinear interpolation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
25	Bitcoin/public point to address	①	②	③	④		⑥	⑦	⑧	⑨	⑩
25	Compare sorting algorithms' performance	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
25	Continued fraction/Arithmetic/G(matrix ng, continued fraction n1, continued fraction n2)	①	②	③	④			⑦	⑧	⑨	⑩
25	Create an object/Native demonstration	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
25	Draw pixel 2	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
25	Eertree	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
25	Erdős-Nicolas numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
25	Find duplicate files	①	②	③	④		⑥	⑦	⑧	⑨	⑩
25	Iccanobif primes	①	②	③	④	⑤	⑥	⑦	⑧		⑩
25	Jordan-Pólya numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
25	Juggler sequence	①	②	③	④		⑥	⑦	⑧	⑨	⑩
25	Largest palindrome product	①	②	③	④	⑤	⑥		⑧	⑨
25	Line circle intersection	①	②	③	④	⑤	⑥	⑦		⑨	⑩
25	Long stairs	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
25	Numbers which are not the sum of distinct squares	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
25	Pandigital prime	①	②	③	④	⑤	⑥			⑨
25	Perceptron	①	②	③	④	⑤		⑦	⑧	⑨	⑩
25	Pig the dice game/Player	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
25	Polynomial synthetic division	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
25	Practical numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
25	Quoting constructs	①	②	③	④	⑤	⑥	⑦		⑨	⑩
25	Reflection/Get source	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
25	Sequence: nth number with exactly n divisors	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
25	Set right-adjacent bits	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
25	Singly-linked list/Element removal	①	②	③	④	⑤	⑥	⑦	⑧	⑨
25	Untrusted environment	①	②		④	⑤	⑥	⑦		⑨
25	Useless instructions	①	②	③	④	⑤	⑥	⑦		⑨
24	Compiler/code generator	①	②	③	④		⑥	⑦	⑧	⑨	⑩
24	Compiler/syntax analyzer	①	②	③			⑥	⑦	⑧	⑨	⑩
24	Elementary cellular automaton/Infinite length	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
24	Equal prime and composite sums	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
24	Extreme primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
24	Fortunate numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
24	Jaro-Winkler distance	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
24	Knuth's power tree	①	②	③	④		⑥	⑦	⑧	⑨	⑩
24	Latin Squares in reduced form	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
24	Nonogram solver	①	②	③	④		⑥	⑦	⑧	⑨	⑩
24	Pairs with common factors	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
24	Peaceful chess queen armies	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
24	Pseudo-random numbers/Combined recursive generator MRG32k3a	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
24	Selective file copy	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
24	Shape-Machine	①	②	③	④	⑤			⑧		⑩
24	Smallest numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨
24	Sokoban	①	②	③	④		⑥	⑦	⑧	⑨	⑩
24	Special pythagorean triplet	①	②	③	④	⑤	⑥	⑦	⑧	⑨
24	Upside-down numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
24	Window management	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
23	Binomial transform	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
23	Centre and radius of a circle passing through 3 points in a plane	①	②	③	④	⑤	⑥		⑧		⑩
23	Curve that touches three points	①	②	③	④	⑤	⑥	⑦		⑨	⑩
23	Geohash	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
23	Gradient descent	①	②	③	④	⑤	⑥	⑦		⑨	⑩
23	Jaccard index	①	②	③	④	⑤	⑥	⑦	⑧		⑩
23	Logistic curve fitting in epidemiology	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
23	Longest palindromic substrings	①	②	③	④	⑤	⑥	⑦	⑧	⑨
23	Montgomery reduction	①	②	③	④		⑥	⑦	⑧	⑨	⑩
23	Multiplicatively perfect numbers	①	②	③	④	⑤	⑥	⑦		⑨	⑩
23	Percolation/Mean cluster density	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
23	Percolation/Site percolation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
23	Polynomial derivative	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
23	Primes - allocate descendants to their ancestors	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
23	Ruth-Aaron numbers	①	②	③	④	⑤	⑥	⑦		⑨	⑩
23	Solve hanging lantern problem	①	②	③	④	⑤	⑥	⑦	⑧		⑩
23	Sub-unit squares	①	②	③	④	⑤	⑥	⑦	⑧		⑩
23	Tarjan	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
23	Two bullet roulette	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
23	Ultra useful primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
23	Wolstenholme numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
22	ASCII control characters	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
22	Bernstein basis polynomials	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
22	Color quantization	①	②	③	④		⑥	⑦	⑧	⑨	⑩
22	Cyclotomic polynomial	①	②	③	④		⑥	⑦	⑧	⑨	⑩
22	Data Encryption Standard	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
22	Distribution of 0 digits in factorial series	①	②	③	④		⑥	⑦	⑧	⑨	⑩
22	Find URI in text	①	②	③	④	⑤	⑥			⑨
22	Imaginary base numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
22	Iterators	①	②	③	④	⑤	⑥	⑦	⑧		⑩
22	Just in time processing on a character stream	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
22	Nimber arithmetic	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
22	P-value correction	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
22	Pell numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
22	Penta-power prime seeds	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
22	Readline interface	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
22	Repunit primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
22	Rhonda numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
22	Self-hosting compiler	①	②	O	④	⑤		⑦	⑧	⑨
22	Simulate input/Mouse	①	②	③	④	⑤			⑧	⑨	⑩
22	Square root by hand	①	②	③	④	⑤	⑥	⑦		⑨	⑩
22	XXXX redacted	①	②	③	④	⑤	⑥		⑧	⑨
21	Anaprimes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
21	Arithmetic coding/As a generalized change of radix	①	②	③	④		⑥	⑦	⑧	⑨	⑩
21	Aspect oriented programming	①	②	③	④	⑤	⑥		⑧	⑨	⑩
21	Bitmap/Read an image through a pipe	①	②	③	④	⑤	⑥	⑦	⑧	⑨
21	Bézier curves/Intersections	①	②	③	④	⑤		⑦	⑧	⑨	⑩
21	Free polyominoes enumeration	①	②	③		⑤	⑥	⑦	⑧	⑨	⑩
21	HTTPS/Client-authenticated	①	②	③	④		⑥	⑦	⑧	⑨	⑩
21	Minimal steps down to 1	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
21	Most frequent k chars distance	①	②		④	⑤	⑥	⑦	⑧	⑨	⑩
21	Penrose tiling	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
21	Primes: n*2^m+1	①	②	③	④	⑤	⑥	⑦	⑧		⑩
21	Pseudorandom number generator image	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
21	Quad-power prime seeds	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
21	Rendezvous	①	②	③	④	⑤		⑦	⑧	⑨	⑩
21	SEND + MORE = MONEY	①	②	③	④	⑤	⑥	⑦	⑧	⑨
21	Simulated annealing	①	②	③	④	⑤	⑥	⑦		⑨
21	Steffensen's method	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
21	Three word location	①	②	③	④	⑤	⑥	⑦		⑨
21	Topological sort/Extracted top item	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
21	Transportation problem	①	②	③	④		⑥	⑦		⑨	⑩
21	Tree from nesting levels	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
21	XML validation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
20	ADFGVX cipher	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
20	Binary coded decimal	①	②	③	④	⑤	⑥	⑦
20	Bioinformatics/Subsequence	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
20	Bitmap/PPM conversion through a pipe	①	②	③	④	⑤	⑥	⑦	⑧	⑨
20	Chernick's Carmichael numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
20	Code segment unload	①	②	③	④	⑤	⑥		⑧	⑨	⑩
20	Compiler/AST interpreter	①	②	③			⑥	⑦	⑧	⑨	⑩
20	Count the coins/0-1	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
20	Execute Computer/Zero	①	②	③	④	⑤		⑦	⑧	⑨	⑩
20	Gaussian primes	①	②	③	④	⑤	⑥	⑦	⑧		⑩
20	Hex dump	①	②	③	④	⑤			⑧		⑩
20	Isograms and heterograms	①	②	③	④	⑤	⑥	⑦	⑧		⑩
20	Mayan calendar	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
20	NYSIIS	①	②	③	④		⑥	⑦	⑧	⑨	⑩
20	Non-transitive dice	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
20	OpenWebNet password	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
20	Ormiston triples	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
20	Overloaded operators	①	②	③	④	⑤	⑥	⑦	⑧
20	Percolation/Bond percolation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
20	Prime triangle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
20	Proof	①	②		④	⑤		⑦	O	⑨	O
20	Retrieve and search chat history	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
20	Rodrigues’ rotation formula	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
20	SQL-based authentication	①	②	③	④		⑥	⑦	⑧	⑨	⑩
20	Terminal control/Positional read	①	②	③	④	⑤	⑥	⑦	⑧	⑨
20	Walsh matrix	①	②	③	④	⑤	⑥		⑧		⑩
20	War card game	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
20	Word search	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
19	Audio frequency generator	①	②	③	④	⑤	⑥	⑦		⑨	⑩
19	Banker's algorithm	①	②	③	④	⑤	⑥	⑦	⑧	⑨
19	Boustrophedon transform	①	②	③	④	⑤	⑥	⑦	⑧		⑩
19	CORDIC	①	②	③	④	⑤	⑥		⑧		⑩
19	CalmoSoft primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
19	Earliest difference between prime gaps	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
19	Factorial base numbers indexing permutations of a collection	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
19	Fermat pseudoprimes	①	②	③	④	⑤	⑥	⑦			⑩
19	Functional coverage tree	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
19	Home primes	①	②	③	④		⑥	⑦	⑧	⑨	⑩
19	Magic numbers	①	②	③	④	⑤	⑥	⑦	⑧		⑩
19	Minkowski question-mark function	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
19	Pan base non-primes	①	②	③	④	⑤	⑥	⑦	⑧		⑩
19	Particle swarm optimization	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
19	Ramanujan primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
19	SHA-256 Merkle tree	①	②	③	④		⑥	⑦	⑧	⑨	⑩
19	Suffix tree	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
19	Tropical algebra overloading	①	②	③	④	⑤		⑦	⑧	⑨	⑩
19	Unescape a string	①	②	③	④	⑤			⑧		⑩
19	VList	①	②	③	④	⑤		⑦		⑨
18	Canny edge detector	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
18	Distance and Bearing	①	②	③	④	⑤	⑥	⑦	⑧		⑩
18	Even numbers which cannot be expressed as the sum of two twin primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨
18	Find Chess960 starting position identifier	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
18	Geometric algebra	①	②	③	④	⑤		⑦	⑧	⑨	⑩
18	Greatest prime dividing the n-th cubefree number	①	②	③	④	⑤	⑥		⑧		⑩
18	Multi-base primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
18	One-two primes	①	②	③	④	⑤	⑥	⑦	⑧		⑩
18	Pentomino tiling	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
18	Prime numbers whose neighboring pairs are tetraprimes	①	②	③	④	⑤		⑦		⑨	⑩
18	Ramanujan's constant	①	②	③	④		⑥	⑦	⑧	⑨	⑩
18	Search in paragraph's text	①	②	③	④	⑤	⑥	⑦	⑧		⑩
18	Sisyphus sequence	①	②	③	④	⑤	⑥	⑦	⑧		⑩
18	Sorting algorithms/Tree sort on a linked list	①	②	③	④	⑤		⑦		⑨	⑩
18	Square form factorization	①	②	③	④	⑤	⑥	⑦		⑨	⑩
18	Super-Poulet numbers	①	②	③	④	⑤	⑥	⑦	⑧		⑩
18	Triangular numbers	①	②	③	④	⑤	⑥	⑦		⑨
18	Twin primes whose sum is square number	①	②	③	④	⑤			⑧		⑩
18	Untouchable numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨
18	Wordiff	①	②	③	④	⑤	⑥	⑦	⑧		⑩
17	Apéry's constant	①	②	③	④	⑤	⑥	⑦	⑧		⑩
17	Boyer-Moore string search	①	②	③	④	⑤	⑥	⑦	⑧		⑩
17	Centroid of a set of N-dimensional points	①	②	③	④	⑤	⑥			⑨	⑩
17	Check if two polygons overlap	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
17	Combinations with repetitions/Square digit chain	①	②	③	④	⑤	⑥	⑦		⑨	⑩
17	Display an outline as a nested table	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
17	Distinct palindromes within decimal numbers	①	②	③	④	⑤	⑥	⑦		⑨	⑩
17	Faces from a mesh	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
17	Four is the number of letters in the ...	①	②	③	④		⑥	⑦	⑧	⑨	⑩
17	Gotchas	①	②	③	④		⑥				⑩
17	Graph colouring	①	②	③	④		⑥	⑦	⑧	⑨	⑩
17	Penholodigital squares	①	②	③	④	⑤	⑥	⑦		⑨	⑩
17	Prime reciprocal sum	①	②	③	④	⑤	⑥	⑦	⑧		⑩
17	Tetris	①	②	③			⑥		⑧	⑨	⑩
17	Tree datastructures	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
17	Undulating numbers	①	②	③	④	⑤	⑥	⑦	⑧		⑩
17	Unit testing	①	②	③	④	⑤		⑦		⑨	⑩
17	Verhoeff algorithm	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
16	16 puzzle game	①	②	③	④	⑤	⑥	⑦		⑨
16	Check if a polygon overlaps with a rectangle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
16	Deconvolution/2D+	①	②	③	④		⑥	⑦	⑧	⑨	⑩
16	Discrete Fourier transform	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
16	Engel expansion	①	②	③	④	⑤	⑥	⑦			⑩
16	Erdös-Selfridge categorization of primes	①	②	③	④		⑥	⑦		⑨	⑩
16	Interactive help	①	②	③	④	⑤	⑥	⑦		⑨
16	Knuth-Morris-Pratt string search	①	②	③	④	⑤	⑥	⑦	⑧		⑩
16	L-system	①	②	③	④	⑤	⑥		⑧		⑩
16	Launch rocket with countdown and acceleration in stdout	①	②	③	④	⑤	⑥	⑦	⑧	⑨
16	Peripheral drift illusion	①	②	③	④	⑤	⑥	⑦	⑧		⑩
16	Railway circuit	①	②	③	④		⑥	⑦	⑧	⑨	⑩
16	Ramanujan primes/twins	①	②	③	④	⑤	⑥	⑦		⑨	⑩
16	Run as a daemon or service	①	②		④	⑤	⑥	⑦	⑧	⑨
16	Set, the card game	①	②	③	④	⑤			⑧		⑩
16	Simple turtle graphics	①	②	③		⑤	⑥		⑧		⑩
16	Smarandache-Wellin primes	①	②	③	④		⑥	⑦		⑨	⑩
16	Text completion	①	②	③	④	⑤	⑥	⑦		⑨	⑩
16	Text to HTML	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
16	Tupper's self-referential formula	①	②	③	④		⑥	⑦	⑧		⑩
16	Using a speech engine to highlight words	①	②	③	④	⑤		⑦	⑧	⑨
15	Babylonian spiral	①	②	③	④		⑥	⑦	⑧		⑩
15	Brzozowski algebraic method	①	②	③	④	⑤			⑧	⑨	⑩
15	Catmull–Clark subdivision surface	①	②	③				⑦	⑧	⑨	⑩
15	Countdown	①	②	③	④	⑤	⑥	⑦	⑧		⑩
15	External sort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
15	Factorize string into Lyndon words	①	②	③	④	⑤	⑥				⑩
15	Fibonacci matrix-exponentiation	①	②	③	④		⑥	⑦	⑧	⑨	⑩
15	French Republican calendar	①	②	③	④	⑤	⑥	⑦		⑨	⑩
15	Greed	①	②	③	④	⑤	⑥	⑦		⑨	⑩
15	Hourglass puzzle	①	②	③	④	⑤	⑥	⑦	⑧	⑨
15	Least m such that n! + m is prime	①	②	③	④		⑥	⑦			⑩
15	One-time pad	①	②	③	④		⑥	⑦	⑧	⑨	⑩
15	Resistance calculator	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
15	Sieve of Pritchard	①	②	③	④	⑤	⑥	⑦	⑧		⑩
15	Singly-linked list/Reversal	①	②	③	④	⑤	⑥	⑦
15	Singular value decomposition	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
15	Solve equations with substitution method	①	②	③	④	⑤	⑥	⑦	⑧
15	Suffixation of decimal numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨
15	Time-based one-time password algorithm	①	②	③	④	⑤	⑥	⑦		⑨
15	Transliterate English text using the Greek alphabet	①	②	③	④		⑥	⑦	⑧		⑩
14	Checksumcolor	①	②	③	④	⑤	⑥	⑦	⑧	⑨
14	Colour pinstripe/Printer	①	②	③	④	⑤		⑦	⑧	⑨
14	Execute CopyPasta Language	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
14	Generalised floating point addition	①	②	③	④		⑥			⑨	⑩
14	Integer long division	①	②	③	④	⑤	⑥	⑦			⑩
14	McNaughton-Yamada-Thompson algorithm	①	②	③		⑤			⑧	⑨	⑩
14	Numerical and alphabetical suffixes	①	②	③	④	⑤	⑥	⑦	⑧	⑨
14	Pollard's rho algorithm	①	②	③	④	⑤					⑩
14	Powerful numbers	①	②	③	④		⑥	⑦	⑧	⑨	⑩
14	Range modifications	①	②	③	④	⑤	⑥	⑦	⑧	⑨
14	Smallest number k such that k+2^m is composite for all m less than k	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
14	Sort an outline at every level	①	②	③	④		⑥	⑦	⑧	⑨	⑩
14	Starting a web browser	①	②	③	④		⑥	⑦	⑧	⑨	⑩
14	Sync subtitles	①	②	③	④	⑤	⑥		⑧		⑩
14	Wasteful, equidigital and frugal numbers	①	②	③	④	⑤	⑥	⑦			⑩
14	Worthwhile task shaving	①	②	③	④	⑤	⑥	⑦			⑩
13	B-spline	①	②	③	④	⑤	⑥				⑩
13	Bioinformatics/Global alignment	①	②	③	④		⑥	⑦	⑧	⑨	⑩
13	Brace expansion using ranges	①	②	③	④			⑦	⑧	⑨
13	Carmichael lambda function	①	②	③	④	⑤	⑥		⑧		⑩
13	Decreasing contiguous subsequences	①	②	③	④	⑤			⑧
13	Factor-perfect numbers	①	②	③	④	⑤	⑥	⑦	⑧		⑩
13	GSTrans string conversion	①	②	③	④	⑤	⑥		⑧		⑩
13	Inner classes	①	②	③	④	⑤	⑥		⑧	⑨	⑩
13	Lagrange Interpolation	①	②	③	④	⑤	⑥				⑩
13	Morpion solitaire	①	②	③		⑤	⑥	⑦		⑨	⑩
13	Particle fountain	①	②	③	④	⑤	⑥	⑦	⑧		⑩
13	Pinstripe/Printer	①	②	③	④	⑤		⑦		⑨
13	Resistance network calculator	①	②	③	④	⑤	⑥	⑦	⑧	⑨
13	Rice coding	①	②	③	④	⑤	⑥		⑧
13	Rosetta Code/Rank languages by number of users	①	②	③	④		⑥	⑦	⑧	⑨
13	Smallest enclosing circle problem	①	②	③	④	⑤		⑦	⑧	⑨
13	Sorensen–Dice coefficient	①	②	③	④	⑤	⑥	⑦	⑧		⑩
13	Spoof game	①	②	③	④	⑤	⑥	⑦		⑨
13	Terminal control/Restricted width positional input/No wrapping	①	②	③	④	⑤	⑥	⑦		⑨
12	ABC incremental counts	①	②	③	④	⑤			⑧
12	Addition-chain exponentiation	①	②	③	④	⑤		⑦	⑧	⑨
12	Dating agency	①	②	③	④	⑤	⑥		⑧		⑩
12	Elliptic Curve Digital Signature Algorithm	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
12	English cardinal anagrams	①	②	③	④	⑤	⑥		⑧		⑩
12	Hashtron inference	①	②	③	④	⑤	⑥		⑧	⑨	⑩
12	Hierholzer's algorithm	①	②	③	④	⑤			⑧		⑩
12	IPC via named pipe	①	②		④	⑤	⑥			⑨
12	JSON pointer	①	②	③	④		⑥		⑧	⑨
12	Lyndon word		②	③	④	⑤	⑥				⑩
12	Multidimensional Newton-Raphson method	①	②	③	④	⑤		⑦		⑨	⑩
12	N-queens minimum and knights and bishops	①	②	③	④	⑤	⑥	⑦	⑧	⑨
12	Numbers k such that the last letter of k is the same as the first letter of k+1	①	②	③	④	⑤	⑥		⑧		⑩
12	OpenGL/Utah teapot	①	②	③	④	⑤		⑦	⑧	⑨
12	Parse EBNF	①	②	③	④		⑥			⑨
12	Rosetta Code/Tasks without examples	①	②	③	④		⑥	⑦		⑨	⑩
12	Sealed classes and methods	①	②	③	④	⑤		⑦	⑧	⑨	⑩
12	Strassen's algorithm	①	②	③	④	⑤		⑦	⑧	⑨
12	Tamagotchi emulator	①	②	③		⑤		⑦		⑨	⑩
12	Terminal control/Restricted width positional input/With wrapping	①	②	③	④	⑤	⑥	⑦		⑨
12	Variadic fixed-point combinator	①	②	③	④	⑤	⑥		⑧		⑩
11	Anagram generator	①	②	③	④	⑤		⑦			⑩
11	Audio overlap loop	①	②	③	④	⑤		⑦	⑧	⑨
11	Compiler/Verifying syntax	①	②	③	④	⑤	⑥	⑦		⑨
11	Consistent overhead byte stuffing	①	②	③	④	⑤	⑥		⑧		⑩
11	Cycles of a permutation	①	②	③	④	⑤		⑦	⑧		⑩
11	Doubly-linked list/Element removal	①	②	③	④	⑤		⑦		⑨
11	Eisenstein primes	①	②	③	④	⑤	⑥	⑦
11	Horse racing	①	②	③	④	⑤	⑥	⑦		⑨	⑩
11	I'm a software engineer, get me out of here	①	②	③	④		⑥	⑦		⑨	⑩
11	Price list behind API	①	②	③	④	⑤	⑥	⑦	⑧	⑨
11	Raster bars	①	②	③	④	⑤		⑦		⑨
11	Robots	①	②	③	④	⑤				⑨	⑩
11	Statistics/Chi-squared distribution	①	②	③	④	⑤	⑥	⑦	⑧		⑩
11	Syntax highlighting using Mediawiki formatting	①	②	③		⑤			⑧
11	URL shortener	①	②	③	④				⑧	⑨
11	User defined pipe and redirection operators	①	②	③	④	⑤	⑥			⑨
10	Animated Spinners	①	②	③		⑤			⑧		⑩
10	Black box	①	②	③		⑤		⑦		⑨
10	Exponential digital sums	①	②	③	④				⑧		⑩
10	Goodstein Sequence	①	②	③	④	⑤	⑥		⑧
10	Harriss Spiral	①	②	③					⑧		⑩
10	Latin Squares in reduced form/Randomizing using Jacobson and Matthews' technique	①	②	③	④	⑤		⑦		⑨	⑩
10	Marching squares	①	②	③	④	⑤	⑥		⑧
10	OpenGL pixel shader	①	②						⑧	⑨
10	P-Adic numbers, basic	①	②	③	④	⑤		⑦		⑨	⑩
10	Random sentence from book	①	②	③	④		⑥	⑦	⑧
10	Roots of a cubic polynomial	①	②	③	④	⑤					⑩
10	Rosetta Code/Run examples	①	②		④	⑤		⑦		⑨
10	Universal Lambda Machine	①	②				⑥		⑧
10	Waveform analysis/Doh ray me	①	②	③	④	⑤	⑥	⑦		⑨
9	Autogram checker	①	②	③	④	⑤	⑥	⑦	⑧
9	Chess player	①	②			⑤	⑥		⑧	⑨
9	Compiler/Simple file inclusion pre processor	①	②	③	④
9	Dominoes	①	②	③			⑥	⑦			⑩
9	Fibonacci heap	①	②	③	④			⑦	⑧	⑨
9	Hexapawn	①	②	③		⑤	⑥		⑧	⑨
9	Segmentation fault protection	①	②	③	④		⑥	⑦
9	Selection bias in clinical sciences	①	②	③	④	⑤	⑥	⑦	⑧
9	Visitor pattern	①	②	③	④	⑤		⑦	⑧
8	Boids	①	②	③		⑤		⑦		⑨	⑩
8	Continued fraction convergents	①	②	③	④	⑤	⑥		⑧
8	Lucas-Carmichael numbers	①	②	③	④		⑥		⑧
8	P-Adic square roots	①	②	③		⑤		⑦			⑩
8	Posit numbers/decoding	①	②	③	④	⑤	⑥
8	Posit numbers/encoding	①	②	③	④	⑤	⑥
8	Recursive descent parser generator	①	②	③	④		⑥			⑨
8	Remote agent/Agent logic	①	②	③			⑥			⑨
8	Remote agent/Simulation	①	②	③			⑥			⑨
8	Simulated optics experiment/Data analysis	①	②	③				⑦	⑧
8	Simulated optics experiment/Simulator	①	②	③				⑦	⑧
8	Sturmian word		②	③	④	⑤	⑥
8	Time conventions and conversions	①	②	③	④	⑤			⑧		⑩
8	Wave function collapse	①	②		④	⑤	⑥	⑦
8	WiktionaryDumps to words	①	②	③	④		⑥				⑩
7	CLI-based maze-game	①	②	③		⑤		⑦
7	Convert CSV records to TSV	①	②	③		⑤
7	Create an executable for a program in an interpreted language	①	②	③				⑦
7	Create your own text control codes	①	②	③	④	⑤
7	Divide a rectangle into a number of unequal triangles	①	②	③	④	⑤	⑥		⑧
7	Erdős–Woods numbers	①	②	③	④		⑥		⑧
7	Multiton	①	②	③	④	⑤	⑥		⑧		⑩
7	OLE automation	①	②			⑤			⑧	⑨	O
7	Process SMIL directives in XML data	①	②		④		⑥	⑦		⑨
7	Red black tree sort	①	②	③		⑤		⑦	⑧
7	Remote agent/Agent interface	①	②	③						⑨
7	Solve a Rubik's cube	①	②	③	④			⑦		⑨
7	Ukkonen’s suffix tree construction	①	②	③				⑦		⑨	⑩
7	Vidir	①	②		④	⑤
6	Color separation	①	②			⑤			⑧		⑩
6	Extended Straddling Checkerboard	①	②	③		⑤			⑧
6	Number triplets game	①	②	③		⑤	⑥
6	Rosetta Code/List authors of task descriptions	①	②	③	④			⑦		⑨
6	Sanitize user input	①	②	③	④
6	Szymański's algorithm	①	②	③	④	⑤
6	Use a REST API	①	②						⑧	⑨	⑩
6	Waveform analysis/Top and tail	①	②	③		⑤		⑦		⑨
5	Diophantine linear system solving	①	②			⑤		⑦
5	Generalised floating point multiplication	①	②	③						⑨
5	IRC gateway	①	②			⑤				⑨
5	Protecting Memory Secrets	①	②	③		⑤
5	Solving coin problems	①	②	③			⑥			⑨
5	Unicode polynomial equation	①	②	③				⑦		⑨
5	Uno (card game)	①	②	③		⑤			⑧
5	Weather routing	①	②	③				⑦		⑨
4	15 puzzle game in 3D	①	②							⑨
4	3d turtle graphics	①	②			⑤
4	Blackjack strategy	①	②					⑦		⑨
4	Compiler/Preprocessor	①	②	③					⑧
4	Cross compilation	①	②	O		⑤
4	Elevator simulation	①	②			⑤
4	WebGL rotating F	①	②	③