Rosetta Code/Count examples/Full list/Tier 4

From Rosetta Code
Revision as of 21:18, 11 July 2021 by Thundergnat (talk | contribs) (Update full list output)

Fourth tier of languages sorted by number of examples completed.

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

Top tier Second tier Third tier Fourth tier
Fourth ten programming languages by number of task examples completed:
    ㉛ Ring          ㉜ Common_Lisp   ㉝ JavaScript    ㉞ F_Sharp       ㉟ AutoHotkey   
    ㊱ ALGOL_68      ㊲ Delphi        ㊳ Clojure       ㊴ 11l           ㊵ PureBasic    
As of 2021-07-11T20:32:47Z :: Tasks: 1110 :: Draft Tasks:287 :: Total Tasks: 1397 :: Total Examples: 78015
Count Task
495 Hello world/Text
328 99 bottles of beer  
321 FizzBuzz
318 100 doors
295 Fibonacci sequence
288 Factorial
276 Comments
268 A+B
262 Empty program
239 Function definition
229 Loops/Infinite
226 Arrays
226 Loops/While
226 Reverse a string
223 Ackermann function  
208 Loops/For
206 Conditional structures  
203 Greatest common divisor
198 Arithmetic/Integer
197 Greatest element of a list
190 Array concatenation
187 Even or odd
185 Integer comparison
185 Repeat a string
184 Averages/Arithmetic mean
183 Increment a numerical string
178 Hello world/Graphical  
173 Copy a string
173 Sieve of Eratosthenes
170 Boolean values
169 Loops/Downward for
168 Binary digits
168 String concatenation
167 Character codes
167 Towers of Hanoi
166 Apply a callback to an array
166 Array length
165 Loops/Do-while  
164 Hello world/Newline omission
164 Loops/For with a specified step
164 Loops/N plus one half
164 Palindrome detection
164 Sum and product of an array
163 Loops/Foreach
163 String length  
162 Integer sequence
162 Rot-13
161 Loops/Break  
161 String case
161 Sum of a series
161 Tokenize a string
156 Dot product
155 Generic swap
155 Leap year
155 Sum of squares
154 Empty string
154 Hailstone sequence
154 Logical operations
153 Filter
153 Quine    
151 Associative array/Creation
151 Sort an integer array
150 Sorting algorithms/Bubble sort
148 Factors of an integer
147 Execute a system command
146 Roman numerals/Encode
145 Remove duplicate elements
144 Caesar cipher
144 System time
143 Determine if a string is numeric  
143 Guess the number  
143 Loop over multiple arrays simultaneously
142 Higher-order functions
141 Sorting algorithms/Quicksort  
141 User input/Text
140 File input/output
139 Luhn test of credit card numbers  
138 Hello world/Standard error
137 Bitwise operations
137 Day of the week
137 Primality by trial division
135 Command-line arguments
135 Read entire file
135 Stack
134 Create a file
134 Happy numbers
134 Loops/Continue
134 Mutual recursion  
134 Substring
134 Zero to the zero power
132 Check that file exists
132 Generate lower case ASCII alphabet
132 Sleep
131 Pascal's triangle
130 Least common multiple
129 ABC problem
129 Literals/String  
128 Date format
128 Flatten a list    
126 Balanced brackets
126 Variables
125 Ethiopian multiplication
125 Program termination
124 Binary search
124 Compound data type
124 Include a file    
124 Mandelbrot set
123 Formatted numeric output
123 Function composition
123 Literals/Integer
122 Detect division by zero  
122 Roman numerals/Decode
121 Associative array/Iteration
121 Count in octal  
121 Count occurrences of a substring
121 Loops/Nested  
121 N-queens problem  
120 Averages/Root mean square
120 Knuth shuffle
120 Null object
120 Sorting algorithms/Insertion sort
119 Read a file line by line  
118 Haversine formula  
117 Anagrams
117 Multiplication tables
117 Search a list
116 Guess the number/With feedback  
116 Hash from two arrays  
116 Identity matrix
116 Matrix multiplication    
116 Matrix transposition
116 Pick random element
116 Real constants and functions
115 Babbage problem  
115 Case-sensitivity of identifiers
115 Delete a file
115 File size  
115 Letter frequency
114 Averages/Median
114 Classes
114 Find limit of recursion  
114 Perfect numbers
114 Rename a file
114 String matching
113 Align columns  
113 Environment variables
113 Input loop  
112 Look-and-say sequence
112 Pangram checker
112 Random numbers  
112 Return multiple values
111 HTTP  
111 Hostname    
110 Arithmetic/Complex  
110 Assertions    
109 Catalan numbers
109 Conway's Game of Life  
109 Sierpinski triangle
108 Accumulator factory      
108 Infinity    
108 Temperature conversion
107 Arithmetic-geometric mean
107 Strip a set of characters from a string
107 Substring/Top and tail
107 Variadic function      
106 Averages/Pythagorean means
106 Evaluate binomial coefficients
106 Horner's rule for polynomial evaluation  
106 Levenshtein distance  
106 Permutations
106 Run-length encoding
105 Prime decomposition
105 Program name
105 String append
104 Anonymous recursion    
104 Reverse words in a string  
104 Strip whitespace from a string/Top and tail
104 Zig-zag matrix  
103 Bulls and cows    
103 Comma quibbling  
103 Regular expressions
103 Sorting algorithms/Merge sort  
103 String interpolation (included)
102 Combinations
102 Exceptions  
102 Nth root
102 Queue/Definition  
102 Trigonometric functions  
101 Ordered words
101 Sorting algorithms/Selection sort
101 The Twelve Days of Christmas  
100 Harshad or Niven series  
100 Middle three digits  
100 Sum multiples of 3 and 5
99 Call a function      
99 N'th
99 Power set
99 Shell one-liner    
99 Short-circuit evaluation
99 Sierpinski carpet
99 String prepend
99 Sum digits of an integer
98 24 game      
98 Create a two-dimensional array at runtime
98 Vector products  
97 Arbitrary-precision integers (included)      
97 Range extraction
97 Y combinator        
96 Interactive programming          
96 Range expansion
96 Sorting algorithms/Gnome sort
95 Collections  
95 Digital root
95 Enumerations
95 Execute Brain****  
95 Walk a directory/Non-recursively
94 Abundant, deficient and perfect number classifications  
94 Sequence of non-squares  
94 Time a function    
93 Evolutionary algorithm  
93 Exponentiation operator  
93 First-class functions      
93 Sorting algorithms/Cocktail sort    
92 Averages/Mode  
92 Create an HTML table  
92 Inheritance/Single    
92 MD5      
92 One-dimensional cellular automata    
92 Random number generator (included)    
91 Cumulative standard deviation  
91 Dragon curve      
91 Hello world/Newbie      
91 Hofstadter Q sequence  
91 Number names  
91 Sort using a custom comparator  
91 Sorting algorithms/Bogosort  
90 Amicable pairs  
90 Forward difference
90 JSON      
90 Monty Hall problem
90 Symmetric difference  
89 Averages/Simple moving average
89 Hamming numbers  
89 Josephus problem    
89 Langton's ant  
89 Price fraction
89 String comparison  
88 Entropy
88 Gray code    
87 Greatest subsequential sum
87 Number reversal game    
87 Sorting algorithms/Heapsort
86 CSV data manipulation
86 Catamorphism  
86 Five weekends  
86 Map range  
86 Menu
86 Tree traversal    
85 Abstract type          
85 CSV to HTML translation    
85 Calculating the value of e  
85 Compare a list of strings    
84 Almost prime
84 Floyd's triangle  
84 SEDOLs
84 Walk a directory/Recursively  
84 Window creation  
83 Last Friday of each month        
83 Monte Carlo methods  
83 Non-decimal radices/Convert      
83 Queue/Usage    
83 Simple windowed application      
83 Sort an array of composite structures
83 Terminal control/Clear the screen      
82 Closures/Value capture        
82 Count in factors
82 File modification time  
82 Introspection      
82 Set  
82 URL decoding  
82 Word wrap    
81 Box the compass  
81 Order two numerical lists  
81 Top rank per group    
80 CRC-32  
80 Find the last Sunday of each month  
80 Hello world/Line printer    
80 Here document    
80 Literals/Floating point          
80 Long multiplication  
80 Roots of unity    
80 Sorting algorithms/Shell sort    
80 Terminal control/Ringing the terminal bell    
79 Bitmap    
79 Concurrent computing      
79 Count the coins  
79 Find common directory path  
79 Jensen's Device      
79 Playing cards    
79 Read a specific line from a file  
79 Repeat    
79 Show the epoch      
79 Singly-linked list/Traversal      
79 Sorting algorithms/Counting sort    
79 Spiral matrix  
79 Split a character string based on change of character  
79 Web scraping    
79 XML/Input      
78 Address of a variable          
78 Date manipulation    
78 Dynamic variable names        
78 Multifactorial    
78 Operator precedence  
78 Pythagorean triples  
78 Sockets        
77 Find the missing permutation    
77 Knapsack problem/0-1        
77 Linear congruential generator    
77 Lucas-Lehmer test    
77 Munchausen numbers  
77 Proper divisors
77 Strip comments from a string
77 URL encoding    
76 Averages/Mean angle
76 Call an object method          
76 Kaprekar numbers    
76 Keyboard input/Obtain a Y or N response    
76 Modular inverse
76 Soundex
75 Man or boy test        
75 Non-decimal radices/Output  
75 Phrase reversals    
75 Pi  
75 Population count
75 Semordnilap  
75 Show ASCII table  
75 Sorting algorithms/Comb sort      
75 Sudoku  
75 Unicode variable names  
74 Anagrams/Deranged anagrams
74 Calendar      
74 Equilibrium index  
74 Fibonacci n-step number sequences
74 List comprehensions    
74 Parsing/RPN calculator algorithm      
74 Read a configuration file        
74 SHA-1      
74 Vigenère cipher  
74 Write entire file  
73 Animation    
73 Execute HQ9+    
73 Flow-control structures        
73 Gamma function
73 Hello world/Web server        
73 Multiple distinct objects  
73 Sort disjoint sublist    
73 Special characters        
73 Take notes on the command line    
72 AKS test for primes      
72 Convert seconds to compound duration  
72 Empty directory  
72 Exceptions/Catch an exception thrown in a nested call      
72 Guess the number/With feedback (player)    
72 Quaternion type      
72 Rock-paper-scissors      
72 SHA-256    
72 Singly-linked list/Element definition      
72 Stair-climbing puzzle      
72 Zeckendorf number representation  
71 Currying        
71 Enforced immutability    
71 Euler's sum of powers conjecture  
71 Four bit adder    
71 Fractal tree      
71 Longest common subsequence  
71 Polymorphism    
71 Rep-string
70 15 puzzle game        
70 Bitmap/Bresenham's line algorithm  
70 Call a foreign-language function        
70 Closest-pair problem    
70 Combinations with repetitions        
70 Horizontal sundial calculations      
70 IBAN    
70 Largest int from concatenated ints  
70 Numerical integration    
70 Old lady swallowed a fly            
70 Sorting algorithms/Stooge sort    
70 Trabb Pardo–Knuth algorithm      
70 Write float arrays to a text file        
69 Catalan numbers/Pascal's triangle    
69 Constrained random points on a circle
69 Draw a sphere        
69 Magic squares of odd order    
69 Maze generation    
69 Self-describing numbers      
69 Sorting algorithms/Pancake sort  
69 Thue-Morse      
68 Anti-primes      
68 Barnsley fern        
68 Euler method  
68 Extend your language          
68 Fork          
68 Jump anywhere          
68 Named parameters      
68 Priority queue        
68 Text processing/Max licenses in use      
68 Van der Corput sequence      
67 Amb  
67 Benford's law  
67 Chinese remainder theorem        
67 Department numbers    
67 Fast Fourier transform          
67 Morse code        
67 Nested function      
67 Pernicious numbers      
67 Roots of a function  
67 Sequence of primes by trial division    
67 Sort stability    
67 Special variables        
67 Unix/ls        
66 Arithmetic/Rational        
66 Circles of given radius through two points      
66 One of n lines in a file  
66 Remove lines from a file  
66 Runtime evaluation          
66 Strip control codes and extended characters from a string  
66 Variable size/Get      
65 Continued fraction      
65 Documentation        
65 General FizzBuzz      
65 HTTPS      
65 Hofstadter-Conway $10,000 sequence  
65 Inheritance/Multiple        
65 Narcissistic decimal number    
65 Optional parameters      
65 Roots of a quadratic function      
64 Angle difference between two bearings        
64 Damm algorithm    
64 Factors of a Mersenne number      
64 Jewels and stones        
64 Reduced row echelon form        
64 Tic-tac-toe          
64 Word frequency  
64 Write language name in 3D ASCII        
64 XML/Output      
63 100 prisoners        
63 Animate a pendulum    
63 Exponentiation order          
63 Get system command output            
63 Globally replace text in several files    
63 Memory allocation        
63 Modular exponentiation      
63 Non-decimal radices/Input    
63 Probabilistic choice      
63 Semiprime      
63 Singly-linked list/Element insertion      
63 Sort three variables      
63 Stern-Brocot sequence  
63 Undefined values        
63 Yin and yang        
62 Arithmetic evaluation    
62 Best shuffle      
62 Binary strings        
62 Cholesky decomposition        
62 Mouse position    
62 Plot coordinate pairs      
62 Runge-Kutta method      
62 Test a function    
61 Averages/Mean time of day        
61 Draw a clock          
61 Emirp primes    
61 Generator/Exponential        
61 Sorting algorithms/Sleep sort          
61 Truncatable primes      
61 User input/Graphical      
60 24 game/Solve          
60 Bitmap/Write a PPM file            
60 CUSIP      
60 Cartesian product of two or more lists      
60 Extract file extension      
60 Huffman coding        
60 Knapsack problem/Continuous          
60 Miller–Rabin primality test    
60 Partial function application          
60 Sorting algorithms/Bead sort      
60 Unicode strings            
60 Van Eck sequence      
59 9 billion names of God the integer          
59 Brownian tree        
59 Dutch national flag problem          
59 Host introspection        
59 JortSort  
59 Knapsack problem/Unbounded      
59 Knight's tour        
59 Left factorials        
59 Longest common prefix          
59 Subleq            
59 Two sum      
58 2048    
58 4-rings or 4-squares puzzle        
58 Abundant odd numbers      
58 Add a variable to a class instance at runtime            
58 Compile-time calculation          
58 Gapful numbers    
58 Hash join      
58 I before E except after C      
58 Integer overflow            
58 Leonardo numbers      
58 Ludic numbers  
58 Mad Libs        
58 Odd word problem    
58 Random number generator (device)            
58 Stem-and-leaf plot      
57 Deal cards for FreeCell        
57 Delegates        
57 Doubly-linked list/Element definition      
57 Draw a cuboid        
57 LZW compression        
57 Long year        
57 Magic 8-ball      
57 Matrix-exponentiation operator            
57 Multisplit      
57 Scope modifiers      
57 Sierpinski triangle/Graphical              
57 Singleton          
57 Sorting algorithms/Permutation sort        
57 Square but not cube    
57 Terminal control/Coloured text          
57 Terminal control/Display an extended character          
57 Ternary logic          
57 Topological sort          
57 Truncate a file      
57 Unbias a random generator      
56 DNS query          
56 Determine if a string has all the same characters    
56 Dinesman's multiple-dwelling problem    
56 Discordian date          
56 Extreme floating point values            
56 Fibonacci word
56 Forest fire    
56 Grayscale image          
56 Quickselect algorithm  
56 Rosetta Code/Rank languages by popularity        
56 Stack traces        
55 Base64 encode data          
55 Define a primitive data type          
55 Modulinos        
55 Munching squares                
55 Pascal matrix generation    
55 Runtime evaluation/In an environment        
55 XML/XPath          
54 Attractive numbers          
54 Bernoulli numbers          
54 Chinese zodiac    
54 Determine if a string is collapsible      
54 Draw a pixel          
54 FASTA format      
54 Handle a signal        
54 ISBN13 check digit          
54 Iterated digits squaring        
54 Kernighans large earthquake problem          
54 Pointers and references          
54 Synchronous concurrency        
54 Terminal control/Cursor positioning          
54 Universal Turing machine          
54 Wireworld      
53 Base64 decode data            
53 Call a function in a shared library            
53 Convert decimal number to rational        
53 Dijkstra's algorithm  
53 Dining philosophers        
53 Heronian triangles        
53 Keyboard input/Keypress check      
53 Longest common substring      
53 Loops/Increment loop index within loop body      
53 Maximum triangle path sum      
53 Non-continuous subsequences    
53 Perfect shuffle    
53 Send email          
53 Seven-sided dice from five-sided dice    
53 Statistics/Basic              
53 Text processing/2        
53 Validate International Securities Identification Number          
53 Vector              
53 XML/DOM serialization          
52 Copy stdin to stdout          
52 First-class functions/Use numbers analogously            
52 Gaussian elimination        
52 Inverted syntax              
52 Longest increasing subsequence        
52 Polynomial regression              
52 Rate counter        
52 Smith numbers    
52 Strip block comments      
52 Tokenize a string with escaping        
51 Farey sequence          
51 Holidays related to Easter          
51 Longest string challenge          
51 McNuggets problem        
51 Move-to-front algorithm    
51 Pig the dice game          
51 Respond to an unknown method call            
51 Sattolo cycle          
51 Shoelace formula for polygonal area          
50 Archimedean spiral        
50 Associative array/Merging    
50 Cantor set          
50 Colour bars/Display          
50 Find the intersection of two lines        
50 Fractran        
50 GUI component interaction        
50 Jaro similarity          
50 Make directory path      
50 Naming conventions          
50 Password generator          
50 RPG attributes generator          
50 Search a list of records        
50 Stable marriage problem          
50 Text processing/1      
50 Zebra puzzle            
49 Chaos game          
49 Determinant and permanent              
49 Doubly-linked list/Element insertion      
49 Doubly-linked list/Traversal      
49 Greyscale bars/Display            
49 Hofstadter Figure-Figure sequences        
49 Last letter-first letter        
49 Metaprogramming            
49 Sort numbers lexicographically        
48 Determine if a string has all unique characters    
48 Echo server      
48 Egyptian division      
48 Execute a Markov algorithm          
48 Extensible prime generator      
48 History variables          
48 Polymorphic copy          
48 Polynomial long division            
48 Visualize a tree      
48 Water collected between towers            
47 Append a record to the end of a text file                  
47 Bitmap/Flood fill              
47 Kronecker product          
47 Narcissist            
47 OpenGL      
47 Problem of Apollonius            
47 Ulam spiral (for primes)            
47 Verify distribution uniformity/Naive      
46 Active object          
46 Average loop length              
46 Determine if only one instance is running          
46 Element-wise operations            
46 Fusc sequence        
46 Parsing/Shunting-yard algorithm        
46 Remove vowels from a string      
46 Set consolidation        
46 Sorting algorithms/Radix sort            
46 Two identical strings            
45 Bulls and cows/Player            
45 Carmichael 3 strong pseudoprimes          
45 Determine if a string is squeezable          
45 Doubly-linked list/Definition  
45 Generate Chess960 starting position            
45 Image noise          
45 Nim game          
45 Recaman's sequence            
45 Rosetta Code/Count examples          
45 Send an unknown method call              
45 Sparkline in unicode        
45 Spinning rod animation/Text              
45 Sum to 100    
45 Taxicab numbers        
45 Text between          
44 Atomic updates        
44 Bitmap/Read a PPM file            
44 Currency          
44 Digital root/Multiplicative digital root          
44 Elementary cellular automaton            
44 Flipping bits game            
44 GUI/Maximum window dimensions            
44 Hickerson series of almost integers              
44 Percentage difference between images          
44 Secure temporary file              
44 Sorting Algorithms/Circle Sort            
44 Subtractive generator          
44 Truth table            
43 Bell numbers            
43 Deepcopy          
43 Fivenum              
43 Inverted index        
43 Keyboard input/Flush the keyboard buffer              
43 Knapsack problem/Bounded          
43 MD5/Implementation              
43 Ranking methods              
43 S-expressions            
43 Sailors, coconuts and a monkey problem          
43 Summarize and say sequence        
43 Table creation/Postal addresses            
43 The Name Game            
43 Twelve statements              
43 UTF-8 encode and decode        
43 Voronoi diagram          
42 Aliquot sequence classifications              
42 Balanced ternary              
42 Bitmap/Midpoint circle algorithm            
42 Calendar - for "REAL" programmers            
42 Days between dates              
42 Hilbert curve            
42 Musical scale          
42 Pascal's triangle/Puzzle        
42 Permutations by swapping          
42 Permutations/Derangements          
42 Sort a list of object identifiers          
42 Speech synthesis            
42 Start from a main routine          
42 Terminal control/Dimensions          
41 Casting out nines              
41 Chowla numbers                  
41 Color of a screen pixel      
41 Combinations and permutations                
41 Loops/With multiple ranges          
41 Parallel calculations        
41 Permutation test            
41 Permutations with repetitions          
41 Prime conspiracy              
41 Primorial numbers        
41 Sorting algorithms/Strand sort        
41 Sum of divisors          
41 Topswops                
41 Totient function              
41 Variable size/Set                
40 21 game            
40 Cramer's rule              
40 Euler's identity            
40 Feigenbaum constant calculation              
40 GUI enabling/disabling of controls            
40 Julia set            
40 Magic squares of doubly even order              
40 Parametric polymorphism                
40 Ray-casting algorithm          
40 Rosetta Code/Find bare lang tags                  
40 Scope/Function names and labels                
40 Statistics/Normal distribution                  
40 Tau number        
40 Variable-length quantity                  
39 Abbreviations, automatic              
39 Abbreviations, easy              
39 Brace expansion            
39 Brazilian numbers              
39 Colour pinstripe/Display            
39 Create a file on magnetic tape              
39 Cycle detection                  
39 Display a linear combination            
39 Events        
39 File extension is in extensions list          
39 Floyd-Warshall algorithm              
39 Kahan summation              
39 Knuth's algorithm S            
39 LU decomposition              
39 Largest number divisible by its digits            
39 Long primes            
39 MAC Vendor Lookup          
39 Metered concurrency                
39 Multiple regression                
39 Order disjoint list items            
39 Palindrome dates    
39 Parsing/RPN to infix conversion        
39 Penney's game              
39 Perfect totient numbers            
39 Pythagorean quadruples            
39 Sutherland-Hodgman polygon clipping              
38 Bioinformatics/base count          
38 Break OO privacy              
38 Constrained genericity                
38 Convex hull                
38 Cuban primes          
38 Find the intersection of a line with a plane                
38 Function prototype      
38 Humble numbers        
38 Idiomatically determine all the lowercase and uppercase letters        
38 Input/Output for lines of text            
38 Input/Output for pairs of numbers              
38 Loops/Wrong ranges                
38 Lychrel numbers            
38 Maze solving        
38 Mertens function              
38 Minesweeper game            
38 Pathological floating point problems            
38 Primality by Wilson's theorem              
38 QR decomposition                  
38 Read a file character by character/UTF8            
38 Solve the no connection puzzle              
38 Substitution cipher                
38 Terminal control/Hiding the cursor            
38 Terminal control/Inverse video            
38 Vampire number          
37 Approximate equality                  
37 Fibonacci word/fractal            
37 Find palindromic numbers in both binary and ternary bases          
37 Four is magic        
37 Isqrt (integer square root) of X              
37 MD4          
37 Metronome        
37 Object serialization                
37 Safe primes and unsafe primes            
37 Square-free integers                
37 Test integerness                
37 Words containing "the" substring          
36 Abbreviations, simple              
36 Bitwise IO          
36 Check output device is a terminal                  
36 Egyptian fractions                
36 Largest proper divisor of n              
36 Numerical integration/Gauss-Legendre Quadrature              
36 Ordered partitions                
36 Pentagram              
36 Pinstripe/Display              
36 Pythagoras tree            
36 RIPEMD-160              
36 RSA code          
36 Tau function          
36 Terminal control/Unicode output              
35 Arithmetic-geometric mean/Calculate Pi              
35 Bitmap/Bézier curves/Cubic            
35 Determine if two triangles overlap              
35 Entropy/Narcissist                
35 Factorions            
35 Lah numbers                  
35 Multiline shebang              
35 Numbers divisible by their individual digits, but not by the product of their digits.              
35 Parametrized SQL statement              
35 Subset sum problem                
35 Yellowstone sequence        
34 Cheryl's birthday              
34 Church numerals                
34 Conjugate transpose                  
34 Coprimes              
34 Galton box animation              
34 Integer roots                  
34 Multi-dimensional array              
34 Mutex                
34 Old Russian measure of length              
34 Partition an integer x into n primes              
34 Pattern matching              
34 Poker hand analyser          
34 Sequence: smallest number with exactly n divisors        
34 Set puzzle                
34 Sorting algorithms/Patience sort            
34 Straddling checkerboard        
34 Sum of the digits of n is substring of n              
34 Topic variable                
33 Bitcoin/address validation                
33 Check input device is a terminal                
33 Continued fraction/Arithmetic/Construct from rational number              
33 Decimal floating point number to binary                
33 Executable library                
33 Frobenius numbers              
33 Multiplicative order                
33 Negative base numbers            
33 Parse command-line arguments              
33 Resistor mesh                  
33 Solve a Hidato puzzle                
33 Strong and weak primes            
33 Terminal control/Cursor movement                
33 Textonyms            
33 Type detection                
33 Zumkeller numbers                
32 Apply a digital filter (direct form II transposed)                  
32 Bitmap/Bézier curves/Quadratic                  
32 Chaocipher              
32 Compiler/lexical analyzer                
32 Cousin primes              
32 Dice game probabilities                  
32 Eban numbers                  
32 Execute SNUSP          
32 Faulhaber's formula                    
32 Faulhaber's triangle                
32 Implicit type conversion                
32 Mersenne primes                
32 Primes which sum of digits is 25          
32 Product of divisors            
32 Reflection/List properties                  
32 Rosetta Code/Find unimplemented tasks            
32 Set of real numbers            
32 Sexy primes          
32 Simple database                  
32 Sorting algorithms/Cycle sort                
32 URL parser              
32 Use another language to call a function                
32 Write to Windows event log          
32 Xiaolin Wu's line algorithm                
32 Zhang-Suen thinning algorithm              
31 Arena storage pool                  
31 Bacon cipher                  
31 Bitmap/Histogram                
31 Chat server                
31 Check Machin-like formulas                  
31 Checkpoint synchronization                
31 Diversity prediction theorem              
31 Draw a rotating cube            
31 Extra primes                
31 FTP                  
31 First class environments                  
31 First power of 2 that has leading decimal digits of 12              
31 Gauss-Jordan matrix inversion                    
31 Jacobi symbol                
31 Keyboard macros        
31 Length of an arc between two angles            
31 Longest common suffix        
31 Mian-Chowla sequence            
31 Modular arithmetic                  
31 Nice primes              
31 Numbers with prime digits whose sum is 13            
31 Numeric error propagation              
31 Parallel brute force          
31 Pell's equation              
31 Rosetta Code/Fix code tags        
31 Sequence: smallest number greater than previous term with exactly n divisors          
31 Stirling numbers of the second kind                
31 Sum of first n cubes              
31 Super-d numbers              
31 Terminal control/Preserve screen                
31 Weird numbers                
31 Word break problem            
30 AVL tree                  
30 Decision tables              
30 Deconvolution/1D                
30 HTTPS/Authenticated              
30 Koch curve              
30 Numbers which binary and ternary digit sum are prime              
30 Pragmatic directives                
30 Smarandache prime-digital sequence            
30 Special Divisors              
30 State name puzzle                
30 Stirling numbers of the first kind              
30 Strange numbers              
30 Stream merge                  
30 Triplet of three numbers              
30 Update a configuration file                
30 Verify distribution uniformity/Chi-squared test                    
30 Window creation/X11                
30 Word wheel          
29 ABC words              
29 Base-16 representation            
29 Burrows–Wheeler transform                    
29 Death Star              
29 Fairshare between two and more                
29 Find first and last set bit of a long integer            
29 Formal power series                
29 Fraction reduction                
29 Honeycombs                
29 Law of cosines - triples              
29 Memory layout of a data structure                  
29 Peano curve                  
29 Perlin noise            
29 Polyspiral                
29 Ramsey's theorem                
29 Range consolidation            
29 Strange plus numbers            
29 Successive prime differences            
29 Sum and product puzzle                
29 Superellipse                  
29 Superpermutation minimisation              
29 Table creation                  
29 Thiele's interpolation formula              
29 Unprimeable numbers                
29 World Cup group stage                
28 Active Directory/Connect                
28 Chebyshev coefficients                    
28 Chemical calculator                  
28 Find largest left truncatable prime in a given base                  
28 Find prime numbers of the form n*n*n+2            
28 Find words with alternating vowels and consonants            
28 First perfect square in base n with n unique digits              
28 Machine code              
28 Möbius function              
28 Natural sorting                  
28 Nautical bell                
28 Nonoblock              
28 Numbers with equal rises and falls              
28 Plasma effect              
28 Reflection/List methods              
28 Same fringe                  
28 Smallest square that begins with n              
28 Sorting algorithms/Cocktail sort with shifting bounds                
28 Strange unique prime triplets          
28 The ISAAC Cipher                
28 Tonelli-Shanks algorithm                
27 A* search algorithm                
27 Additive primes              
27 Angles (geometric), normalization and conversion                
27 Birthday problem                
27 Card shuffles                    
27 Circular primes                  
27 Create an object at a given address              
27 Cut a rectangle                
27 Distributed programming                
27 Fermat numbers                  
27 Finite state machine                
27 Go Fish                
27 Image convolution                
27 Minimum positive multiple in base 10 using only 0 and 1              
27 Monads/Maybe monad          
27 N-smooth numbers                  
27 Palindromic gapful numbers                
27 Paraffins                    
27 Partition function P              
27 Pierpont primes            
27 Primes with digits in nondecreasing order              
27 Ramer-Douglas-Peucker line simplification                
27 Safe addition                  
27 Sequence of primorial primes                
27 Shift list elements to left by 3        
27 Sierpinski pentagon                  
27 Solve a Holy Knight's tour              
27 Teacup rim text            
26 Abelian sandpile model                
26 Alternade words              
26 Bin given limits                  
26 Color wheel                  
26 Find words which contains more than 3 e vowels              
26 Fixed length records                  
26 Function frequency                  
26 Hough transform                    
26 Increasing gaps between consecutive Niven numbers                    
26 Kronecker product based fractals                  
26 Magic squares of singly even order                  
26 Mayan numerals              
26 Parse an IP Address                
26 Snake and Ladder                  
26 Welch's t-test                    
25 Audio alarm            
25 Base58Check encoding                    
25 Cipolla's algorithm                  
25 Elliptic curve arithmetic                    
25 Generate random chess position                    
25 Hunt the Wumpus              
25 Idiomatically determine all the characters that can be used for symbols                  
25 Intersecting number wheels            
25 K-means++ clustering                  
25 Kolakoski sequence                  
25 Linux CPU utilization                    
25 List rooted trees              
25 Long literals, with continuations                
25 Magnanimous numbers              
25 Make a backup file                
25 Next highest int from digits          
25 Play recorded sounds            
25 Playfair cipher                  
25 RCRPG            
25 Random Latin squares            
25 Simulate input/Keyboard              
25 Summarize primes              
25 Total circles area                  
25 Yahoo! search interface                  
24 Common sorted list            
24 De Bruijn sequences                    
24 Elementary cellular automaton/Random Number Generator                  
24 Markov chain text generator                  
24 Matrix chain multiplication                    
24 Mind boggling card trick            
24 Padovan sequence            
24 Percolation/Mean run density                    
24 Permutations/Rank of a permutation                  
24 Pseudo-random numbers/PCG32            
24 Reverse the gender of a string                
24 Shortest common supersequence                
24 Show the (decimal) value of a number of 1s appended with a 3, then squared              
24 Sokoban                
24 Twin primes          
24 Video display modes                  
23 Active Directory/Search for a user                    
23 Bioinformatics/Sequence mutation              
23 Change e letters to i in words            
23 Create an object/Native demonstration                
23 Deming's Funnel                    
23 Find duplicate files                  
23 Lucky and even lucky numbers                
23 Main step of GOST 28147-89                  
23 Monads/List monad          
23 Numbers in base 10 that are palindromic in bases 2, 4, and 16              
23 Numbers with same digit set in base 10 and base 16                
23 Piprimes              
23 Pseudo-random numbers/Xorshift star            
23 Record sound                
23 SOAP            
23 Solve a Hopido puzzle                
23 Solve a Numbrix puzzle                
23 Spelling of ordinal numbers              
22 15 puzzle solver                
22 ASCII art diagram converter                  
22 Addition chains                    
22 Assertions in design by contract                    
22 Commatizing numbers                
22 Data Encryption Standard                    
22 Eertree                
22 Esthetic numbers                
22 Exponentiation with infix operators in (or operating on) the base                
22 File size distribution                  
22 Find prime n for that reversed n is also prime              
22 Kosaraju                  
22 Levenshtein distance/Alignment                    
22 Mastermind              
22 Merge and aggregate datasets            
22 Montgomery reduction                  
22 Nested templated data                  
22 Numeric separator syntax                
22 Orbital elements                    
22 Pig the dice game/Player                
22 Polynomial synthetic division                
22 Reflection/Get source              
22 Self numbers                
22 Sunflower fractal              
22 UPC                
22 Vigenère cipher/Cryptanalysis                  
22 Vogel's approximation method                  
21 Bitcoin/public point to address                
21 Changeable words                
21 Cistercian numerals                  
21 Doomsday rule                    
21 Index finite lists of positive integers                    
21 Joystick position              
21 K-d tree                  
21 Median filter                    
21 N-body problem                    
21 Native shebang                  
21 Odd words              
21 Pancake numbers                
21 Rare numbers                
21 Readline interface                  
21 Sierpinski arrowhead curve                  
21 Sum data type                
21 Ulam numbers                
21 Window management              
20 Abelian sandpile model/Identity                  
20 Arithmetic coding/As a generalized change of radix                  
20 Bilinear interpolation                    
20 Compiler/code generator                  
20 Elementary cellular automaton/Infinite length                    
20 Find words which first and last three letters are equals              
20 Knuth's power tree                  
20 Latin Squares in reduced form                
20 Line circle intersection                    
20 Monads/Writer monad                
20 Names to numbers                
20 Neighbour primes                
20 Order by pair comparisons                  
20 P-value correction                    
20 Primes - allocate descendants to their ancestors                
20 Print debugging statement                  
20 Selective file copy                  
20 Sequence: nth number with exactly n divisors                  
20 Simulate input/Mouse            
20 Sylvester's sequence              
20 Transportation problem                    
20 Word search                  
20 Words from neighbour ones              
19 Calkin-Wilf sequence                  
19 Code segment unload                    
19 Color quantization                
19 Common list elements              
19 Compiler/virtual machine interpreter                    
19 Coprime triplets            
19 Draw pixel 2              
19 Erdős-primes                  
19 Find URI in text                  
19 Find words which contains all the vowels            
19 Just in time processing on a character stream                    
19 Metallic ratios                  
19 Nonogram solver              
19 Odd squarefree semiprimes                
19 Perceptron                
19 Percolation/Site percolation                    
19 Prime triplets                
19 Prime words                
19 Pseudo-random numbers/Combined recursive generator MRG32k3a                  
19 SQL-based authentication                    
19 Sleeping Beauty problem                  
19 Smallest power of 6 whose decimal expansion contains n              
19 Solve triangle solitare puzzle                  
19 Untrusted environment                    
19 Wieferich primes                  
19 Zeckendorf arithmetic                    
18 Biorhythms                  
18 Canonicalize CIDR                  
18 EKG sequence convergence                  
18 Find if a point is within a triangle                    
18 Free polyominoes enumeration                    
18 Imaginary base numbers                    
18 Most frequent k chars distance              
18 NYSIIS                  
18 Next special primes                
18 Nimber arithmetic                    
18 Numbers in base-16 representation that cannot be written with decimal digits              
18 Peaceful chess queen armies                  
18 Percolation/Mean cluster density                    
18 Self-hosting compiler                  
18 Separate the house number from the street name                    
18 Suffix tree                
18 Tarjan                  
18 Vibrating rectangles                
17 Banker's algorithm                    
17 Bitmap/Read an image through a pipe                  
17 Chernick's Carmichael numbers                  
17 Compiler/syntax analyzer                    
17 Cyclotomic polynomial                    
17 Find first missing positive              
17 Geometric algebra                  
17 HTTPS/Client-authenticated                    
17 Logistic curve fitting in epidemiology                  
17 Matrix digital rain                  
17 Padovan n-step number sequences                
17 Palindromic primes                
17 Particle swarm optimization                  
17 Percolation/Bond percolation                    
17 Proof                    
17 Pseudo-random numbers/Splitmix64                
17 Ramanujan's constant                    
17 Retrieve and search chat history                  
17 Snake              
17 Special factorials                    
17 Terminal control/Positional read                
16 Aspect oriented programming              
16 Bitmap/PPM conversion through a pipe                    
16 Compiler/AST interpreter                    
16 Consecutive Primes With Ascending Or Descending Differences                
16 Cubic Special Primes              
16 Find words which contains most consonants                
16 Getting the number of decimals                
16 Numerical integration/Adaptive Simpson's method                    
16 Practical numbers                  
16 Print itself                
16 Quadrat Special Primes                
16 Rendezvous                
16 Singly-linked list/Element removal                  
16 Square root by hand                  
16 Substring primes                
16 XML validation                  
15 Compare sorting algorithms' performance                  
15 Four is the number of letters in the ...                    
15 Functional coverage tree                  
15 Gradient descent                  
15 OpenWebNet password                
15 Permutations with some identical elements                    
15 Sierpinski curve                  
15 Sine wave                
15 Smallest numbers              
15 Topological sort/Extracted top item                    
15 Unique characters                  
15 Unique characters in each string                
14 Almkvist-Giullera formula for pi                    
14 Continued fraction/Arithmetic/G(matrix ng, continued fraction n)                    
14 Cyclops numbers                
14 Deconvolution/2D+                    
14 Factorial base numbers indexing permutations of a collection                  
14 Generalised floating point addition                  
14 Jaro-Winkler distance              
14 Modified random distribution                    
14 Numbers n in which number 1 occur twice              
14 Pisano period                    
14 SHA-256 Merkle tree                  
14 Untouchable numbers              
14 XXXX redacted                    
13 Air mass                    
13 Checksumcolor                  
13 Harmonic series                    
13 Interactive help                    
13 Launch rocket with countdown and acceleration in stdout                    
13 Longest palindromic substrings              
13 Palindromic primes in base 16              
13 Sierpinski square curve                    
13 Simulated annealing                    
13 Sorting algorithms/Tree sort on a linked list                    
13 Three word location                  
13 Tree from nesting levels                    
13 Two bullet roulette                    
13 VList                    
13 Word ladder                  
12 Audio frequency generator                  
12 Bioinformatics/Subsequence                  
12 Canny edge detector                    
12 Catmull–Clark subdivision surface                    
12 Execute CopyPasta Language                    
12 French Republican calendar                  
12 Geohash                  
12 Greed                    
12 Minimal steps down to 1                    
12 Minkowski question-mark function                    
12 Multi-base primes                  
12 Non-transitive dice                  
12 One-time pad                    
12 Prime numbers p which sum of prime numbers less or equal to p is prime              
12 Pseudorandom number generator image                  
12 Railway circuit                    
12 Run as a daemon or service                    
12 Safe mode                    
12 Suffixation of decimal numbers                  
12 Tetris                  
11 Combinations with repetitions/Square digit chain                    
11 Display an outline as a nested table                  
11 External sort                    
11 Graph colouring                    
11 Numbers which count of divisors is prime                
11 Penrose tiling                    
11 Pentomino tiling                    
11 Powerful numbers                    
11 Range modifications                
11 Resistance calculator                  
11 Spoof game                  
11 Text completion                  
11 Time-based one-time password algorithm                    
11 Tree datastructures                    
11 Unit testing                    
11 Using a speech engine to highlight words                
10 Colour pinstripe/Printer                    
10 Curve that touches three points                  
10 Distribution of 0 Digits in Factorial Series                    
10 Elliptic Curve Digital Signature Algorithm                    
10 Faces from a mesh                    
10 Fibonacci matrix-exponentiation                    
10 Hourglass puzzle                    
10 Longest substrings without repeating characters                  
10 Morpion solitaire                    
10 Numerical and alphabetical suffixes                    
10 Parse EBNF                    
10 Pinstripe/Printer                    
10 Quoting constructs                  
10 Rosetta Code/Rank languages by number of users                    
10 Rosetta Code/Tasks without examples                    
10 Square Form Factorization                    
10 Starting a web browser                    
10 Text to HTML                    
9 16 puzzle game                
9 Continued fraction/Arithmetic/G(matrix ng, continued fraction n1, continued fraction n2)                    
9 Count the coins/0-1                    
9 Fibonacci heap                    
9 Home primes                    
9 IPC via named pipe                    
9 Multidimensional Newton-Raphson method                    
9 Resistance network calculator                  
9 Sort an outline at every level                  
9 User defined pipe and redirection operators                  
9 War card game                    
8 Bioinformatics/global alignment                    
8 Brace expansion using ranges                  
8 Compiler/Verifying syntax                    
8 Discrete Fourier transform                    
8 Distinct Palindromes Within Decimal Numbers                    
8 Doubly-linked list/Element removal                    
8 Mayan calendar                    
8 OpenGL/Utah Teapot                    
8 Price list behind API                    
8 Robots                  
7 Addition-chain exponentiation                    
7 I'm a software engineer, get me out of here                  
7 P-Adic numbers, basic                    
7 Random sentence from book                  
7 Recursive descent parser generator                    
7 Rosetta Code/Run examples                    
7 Smallest enclosing circle problem                    
7 Tamagotchi emulator                    
7 URL shortener                  
7 Waveform analysis/Doh ray me                    
6 Audio overlap loop                
6 Black Box                  
6 Latin Squares in reduced form/Randomizing using Jacobson and Matthews’ Technique                  
6 OpenGL pixel shader                  
6 Process SMIL directives in XML data                    
6 Remote agent/Agent logic                    
6 Remote agent/Simulation                    
6 Strassen's algorithm                    
6 Terminal control/Restricted width positional input/No wrapping                  
6 Terminal control/Restricted width positional input/With wrapping                  
5 Boids                    
5 Chess player                    
5 Compiler/Simple file inclusion pre processor                  
5 Generalised floating point multiplication                  
5 Hexapawn                  
5 OLE automation                  
5 P-Adic square roots                    
5 Raster bars                    
5 Remote agent/Agent interface                    
5 Solve a Rubik's Cube                    
5 Unicode polynomial equation                    
5 Weather routing                    
5 WiktionaryDumps to words                    
4 Rosetta Code/List authors of task descriptions                    
4 Solving coin problems                    
4 Ukkonen’s suffix tree construction                    
4 Using the Meetup.com API                  
4 Waveform analysis/Top and tail                    
3 Blackjack strategy                    
3 Vidir                    
2 15 puzzle game in 3D                  
2 CLI-based maze-game                    
2 IRC gateway                    
0 Mine a bitcoin