Rosetta Code/Count examples/Full list/Tier 4

Revision as of 21:36, 17 January 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 JavaScript    ㉜ FreeBASIC     ㉝ AutoHotkey    ㉞ Ring          ㉟ Clojure      
    ㊱ F_Sharp       ㊲ ALGOL_68      ㊳ Unicon        ㊴ Fortran       ㊵ PureBasic    
As of 2021-01-17T21:26:34Z :: Tasks: 1083 :: Draft Tasks:226 :: Total Tasks: 1309 :: Total Examples: 72396
Count Task
480 Hello world/Text
318 99 bottles of beer
313 100 doors
310 FizzBuzz
284 Factorial
282 Fibonacci sequence
272 Comments
261 A+B
256 Empty program
237 Function definition
226 Loops/Infinite
223 Reverse a string
222 Arrays
222 Loops/While
216 Ackermann function
205 Loops/For
200 Conditional structures  
197 Greatest common divisor
195 Greatest element of a list
194 Arithmetic/Integer
186 Repeat a string
185 Array concatenation
184 Integer comparison
183 Even or odd
182 Averages/Arithmetic mean
181 Increment a numerical string
176 Hello world/Graphical
171 Copy a string
168 Boolean values
167 Loops/Downward for
164 Apply a callback to an array
164 Character codes
164 Sieve of Eratosthenes
163 Loops/N plus one half
163 String concatenation
162 Array length
162 Loops/Do-while  
162 Sum and product of an array
161 Hello world/Newline omission
161 Loops/For with a specified step
161 Loops/Foreach
160 String length
158 Binary digits
158 Integer sequence
157 Loops/Break  
157 Towers of Hanoi
156 Palindrome detection
155 String case
155 Sum of a series
154 Generic swap
153 Tokenize a string  
152 Dot product
152 Empty string
152 Hailstone sequence
152 Leap year
152 Logical operations
152 Rot-13
152 Sum of squares
148 Associative array/Creation    
148 Filter
146 Quine
146 Sorting algorithms/Bubble sort
145 Execute a system command
145 Sort an integer array
143 Factors of an integer
142 Guess the number  
142 Higher-order functions
140 Caesar cipher
140 Determine if a string is numeric
140 Remove duplicate elements
140 Roman numerals/Encode
140 System time
139 File input/output
139 User input/Text
138 Sorting algorithms/Quicksort
137 Loop over multiple arrays simultaneously
136 Day of the week
136 Hello world/Standard error
135 Bitwise operations
135 Command-line arguments
134 Luhn test of credit card numbers
134 Primality by trial division
133 Read entire file
132 Create a file
131 Loops/Continue
131 Stack
131 Substring
130 Sleep
129 Generate lower case ASCII alphabet
128 Check that file exists
128 Literals/String  
128 Mutual recursion
127 Date format
127 Flatten a list
127 Happy numbers
126 Least common multiple
126 Pascal's triangle
126 Zero to the zero power
124 ABC problem
123 Balanced brackets
123 Binary search  
122 Literals/Integer
122 Program termination
121 Compound data type
121 Ethiopian multiplication
121 Include a file  
121 Loops/Nested  
120 Detect division by zero
120 Variables  
119 Associative array/Iteration    
119 Formatted numeric output
119 Function composition  
119 Knuth shuffle
118 Null object  
117 Averages/Root mean square
117 N-queens problem
117 Read a file line by line
116 Anagrams
116 File size
116 Hash from two arrays      
116 Mandelbrot set
116 Search a list
115 Classes  
115 Sorting algorithms/Insertion sort
114 Count in octal
114 Count occurrences of a substring
114 Delete a file
114 Guess the number/With feedback
114 Multiplication tables
114 Real constants and functions
113 Case-sensitivity of identifiers
113 Matrix multiplication  
113 Matrix transposition
113 Roman numerals/Decode
112 Babbage problem    
112 Environment variables
112 Identity matrix
112 Input loop
112 String matching
111 Align columns  
111 Averages/Median
111 Hostname  
111 Random numbers
110 Pick random element
109 Arithmetic/Complex  
109 Find limit of recursion
109 HTTP    
109 Haversine formula
109 Perfect numbers
109 Rename a file
109 Return multiple values
108 Accumulator factory    
108 Letter frequency
107 Conway's Game of Life  
107 Infinity    
107 Pangram checker
106 Catalan numbers
105 Assertions    
105 Horner's rule for polynomial evaluation
105 Permutations
105 Temperature conversion
104 Arithmetic-geometric mean
104 Averages/Pythagorean means
104 Levenshtein distance    
104 Program name
104 Variadic function    
103 Anonymous recursion  
103 Evaluate binomial coefficients
103 Run-length encoding
103 Strip a set of characters from a string
103 Substring/Top and tail
102 Exceptions      
102 Look-and-say sequence
102 Prime decomposition
102 Regular expressions    
101 String append
100 Combinations
100 Queue/Definition  
100 String interpolation (included)
100 Strip whitespace from a string/Top and tail
100 Trigonometric functions
100 Zig-zag matrix
99 Comma quibbling  
99 Nth root
99 Reverse words in a string  
99 Sorting algorithms/Merge sort  
98 Shell one-liner  
98 Short-circuit evaluation
97 24 game  
97 Bulls and cows  
97 Sorting algorithms/Selection sort
97 Sum multiples of 3 and 5
96 Interactive programming          
96 Middle three digits  
96 Ordered words
96 Sierpinski triangle  
96 Y combinator            
95 Arbitrary-precision integers (included)    
95 Call a function    
95 Create a two-dimensional array at runtime
94 Collections  
94 Enumerations
94 Power set  
94 Range extraction
93 Inheritance/Single      
93 Range expansion
93 Sorting algorithms/Gnome sort
93 String prepend
93 Vector products  
92 Create an HTML table
92 Digital root
92 Evolutionary algorithm
92 Execute Brain****  
92 Exponentiation operator
92 First-class functions      
92 Time a function  
91 Averages/Mode  
91 MD5    
91 Sequence of non-squares
91 Sorting algorithms/Cocktail sort    
91 Sum digits of an integer
90 Sierpinski carpet  
90 The Twelve Days of Christmas
90 Walk a directory/Non-recursively    
89 Averages/Simple moving average
89 Cumulative standard deviation  
89 JSON          
89 One-dimensional cellular automata  
89 Random number generator (included)    
89 Sort using a custom comparator  
88 Dragon curve      
88 Forward difference
88 Langton's ant
88 Monty Hall problem
88 N'th  
87 Entropy
87 Josephus problem  
87 Sorting algorithms/Bogosort  
87 String comparison
87 Symmetric difference  
86 Hamming numbers  
86 Harshad or Niven series  
85 CSV data manipulation
85 Five weekends
85 Gray code  
85 Greatest subsequential sum
85 Number names  
84 Abstract type          
84 CSV to HTML translation    
84 Map range  
84 Price fraction
84 Window creation  
83 Abundant, deficient and perfect number classifications    
83 Compare a list of strings  
83 Hello world/Newbie        
83 Menu  
83 Sort an array of composite structures
83 Tree traversal    
82 Closures/Value capture        
82 File modification time
82 Last Friday of each month      
82 Simple windowed application      
82 Sorting algorithms/Heapsort
81 Queue/Usage    
80 Box the compass
80 Hofstadter Q sequence
80 Introspection    
80 Literals/Floating point        
80 Monte Carlo methods
80 Non-decimal radices/Convert    
80 SEDOLs
79 Amicable pairs    
79 Catamorphism    
79 Number reversal game    
79 Singly-linked list/Traversal    
79 URL decoding      
79 Walk a directory/Recursively    
79 Web scraping      
78 Count in factors
78 Count the coins    
78 Hello world/Line printer  
78 Roots of unity    
78 Set    
78 Show the epoch    
78 Spiral matrix
78 Terminal control/Clear the screen      
78 XML/Input        
77 Address of a variable          
77 Bitmap    
77 CRC-32  
77 Calculating the value of e    
77 Concurrent computing      
77 Find common directory path  
77 Floyd's triangle
77 Knapsack problem/0-1          
77 Long multiplication  
77 Playing cards    
77 Read a specific line from a file  
77 Sockets          
77 Sorting algorithms/Shell sort    
77 Terminal control/Ringing the terminal bell      
76 Call an object method        
76 Date manipulation    
76 Linear congruential generator    
76 Multifactorial    
76 Order two numerical lists    
76 Top rank per group    
75 Almost prime
75 Dynamic variable names          
75 Jensen's Device    
75 Kaprekar numbers  
75 Keyboard input/Obtain a Y or N response  
75 Lucas-Lehmer test    
75 Man or boy test        
75 Pythagorean triples  
75 Sorting algorithms/Counting sort    
75 Strip comments from a string
75 URL encoding      
75 Word wrap  
74 Averages/Mean angle  
74 Find the last Sunday of each month  
74 Find the missing permutation    
74 Here document      
74 List comprehensions    
74 Modular inverse  
74 Operator precedence    
74 Proper divisors    
73 Fibonacci n-step number sequences
73 Hello world/Web server          
73 Non-decimal radices/Output
73 Sorting algorithms/Comb sort      
73 Soundex    
73 Unicode variable names      
72 Anagrams/Deranged anagrams  
72 Calendar    
72 Exceptions/Catch an exception thrown in a nested call          
72 Multiple distinct objects    
72 Semordnilap  
72 Singly-linked list/Element definition    
72 Split a character string based on change of character    
71 AKS test for primes      
71 Animation    
71 Empty directory      
71 Equilibrium index  
71 Gamma function  
71 Longest common subsequence
71 Pi  
71 Repeat          
71 SHA-1      
71 SHA-256    
71 Special characters      
71 Sudoku    
71 Take notes on the command line        
71 Write entire file    
70 Bitmap/Bresenham's line algorithm  
70 Enforced immutability  
70 Execute HQ9+  
70 Parsing/RPN calculator algorithm      
70 Phrase reversals    
70 Polymorphism      
70 Read a configuration file        
70 Rock-paper-scissors  
69 Call a foreign-language function        
69 Convert seconds to compound duration  
69 Draw a sphere          
69 Euler's sum of powers conjecture    
69 Flow-control structures      
69 Four bit adder      
69 Guess the number/With feedback (player)  
69 IBAN    
69 Quaternion type      
69 Sort disjoint sublist      
69 Vigenère cipher  
69 Write float arrays to a text file      
68 15 puzzle game      
68 Constrained random points on a circle
68 Horizontal sundial calculations    
68 Numerical integration      
68 Population count      
68 Self-describing numbers      
68 Show ASCII table    
68 Sorting algorithms/Stooge sort  
68 Stair-climbing puzzle      
68 Trabb Pardo–Knuth algorithm    
67 Catalan numbers/Pascal's triangle      
67 Closest-pair problem  
67 Combinations with repetitions    
67 Currying          
67 Extend your language        
67 Fork            
67 Fractal tree    
67 Jump anywhere          
67 Largest int from concatenated ints  
67 Maze generation      
67 Munchausen numbers    
67 Text processing/Max licenses in use      
67 Zeckendorf number representation  
66 Arithmetic/Rational        
66 Benford's law  
66 Chinese remainder theorem        
66 Euler method  
66 Magic squares of odd order      
65 Amb    
65 Named parameters        
65 Optional parameters      
65 Priority queue      
65 Sort stability    
65 Special variables      
65 Unix/ls            
65 Variable size/Get      
64 Continued fraction      
64 Documentation      
64 Fast Fourier transform              
64 General FizzBuzz        
64 Hofstadter-Conway $10,000 sequence
64 Inheritance/Multiple          
64 Morse code        
64 Nested function        
64 One of n lines in a file    
64 Runtime evaluation            
64 XML/Output          
63 Barnsley fern      
63 Memory allocation        
63 Remove lines from a file  
63 Roots of a function    
63 Singly-linked list/Element insertion    
63 Sorting algorithms/Pancake sort
63 Strip control codes and extended characters from a string
62 Anti-primes        
62 Cholesky decomposition      
62 Factors of a Mersenne number    
62 HTTPS          
62 Narcissistic decimal number    
62 Pernicious numbers    
62 Roots of a quadratic function      
62 Undefined values      
62 Write language name in 3D ASCII        
61 Animate a pendulum    
61 Exponentiation order          
61 Get system command output          
61 Non-decimal radices/Input  
61 Probabilistic choice  
61 Reduced row echelon form        
61 Rep-string    
61 Sequence of primes by trial division      
61 Sorting algorithms/Sleep sort        
61 Thue-Morse        
60 Arithmetic evaluation      
60 Binary strings          
60 Circles of given radius through two points        
60 Department numbers    
60 Globally replace text in several files      
60 Knapsack problem/Continuous          
60 Modular exponentiation        
60 Old lady swallowed a fly            
60 Plot coordinate pairs      
60 Runge-Kutta method      
60 Semiprime      
60 Van der Corput sequence    
59 24 game/Solve        
59 9 billion names of God the integer          
59 Angle difference between two bearings          
59 Averages/Mean time of day        
59 Best shuffle        
59 Draw a clock      
59 Dutch national flag problem    
59 Host introspection      
59 Knapsack problem/Unbounded        
59 Mouse position    
59 Test a function    
59 Unicode strings              
59 User input/Graphical        
59 Word frequency        
58 Brownian tree      
58 Emirp primes    
58 Hash join          
58 Huffman coding      
58 Partial function application          
58 Tic-tac-toe        
58 Truncatable primes    
58 Yin and yang        
57 4-rings or 4-squares puzzle        
57 Bitmap/Write a PPM file              
57 Compile-time calculation          
57 Deal cards for FreeCell      
57 Delegates            
57 Generator/Exponential          
57 Jewels and stones        
57 Knight's tour        
57 Left factorials      
57 Leonardo numbers      
57 Miller–Rabin primality test  
57 Sort three variables      
57 Sorting algorithms/Bead sort        
56 2048      
56 Add a variable to a class instance at runtime            
56 Doubly-linked list/Element definition      
56 Draw a cuboid        
56 Fibonacci word  
56 I before E except after C    
56 Integer overflow        
56 JortSort      
56 Matrix-exponentiation operator            
56 Odd word problem    
56 Random number generator (device)          
56 Rosetta Code/Rank languages by popularity        
56 Scope modifiers          
56 Singleton              
56 Stem-and-leaf plot  
56 Terminal control/Coloured text        
56 Two sum    
55 Base64 encode data              
55 DNS query              
55 Define a primitive data type          
55 Dinesman's multiple-dwelling problem  
55 Discordian date      
55 Extract file extension        
55 Extreme floating point values        
55 Forest fire
55 LZW compression        
55 Mad Libs      
55 Sorting algorithms/Permutation sort        
55 Stack traces        
55 Stern-Brocot sequence    
55 Terminal control/Display an extended character            
54 CUSIP      
54 Cartesian product of two or more lists          
54 Damm algorithm      
54 Grayscale image          
54 Longest common prefix          
54 Multisplit      
54 Munching squares            
54 Runtime evaluation/In an environment          
54 Sierpinski triangle/Graphical          
54 Synchronous concurrency          
54 Topological sort          
54 XML/XPath              
53 100 prisoners          
53 Abundant odd numbers        
53 Draw a pixel        
53 Ludic numbers    
53 Maximum triangle path sum      
53 Modulinos            
53 Pointers and references        
53 Send email          
53 Subleq                
53 Terminal control/Cursor positioning        
53 Ternary logic        
53 XML/DOM serialization            
52 Bernoulli numbers          
52 First-class functions/Use numbers analogously            
52 Handle a signal          
52 Inverted syntax          
52 Keyboard input/Keypress check      
52 Statistics/Basic          
52 Text processing/2      
52 Truncate a file      
52 Unbias a random generator      
51 Convert decimal number to rational        
51 Gaussian elimination          
51 Iterated digits squaring          
51 Long year        
51 Longest increasing subsequence          
51 Non-continuous subsequences      
51 Quickselect algorithm    
51 Wireworld      
50 Attractive numbers          
50 Base64 decode data                
50 Call a function in a shared library            
50 Chinese zodiac      
50 Colour bars/Display          
50 Dining philosophers            
50 GUI component interaction          
50 Heronian triangles        
50 Loops/Increment loop index within loop body          
50 Respond to an unknown method call              
50 Strip block comments      
50 Universal Turing machine          
50 Validate International Securities Identification Number          
49 Archimedean spiral        
49 Dijkstra's algorithm      
49 FASTA format          
49 Farey sequence              
49 Find the intersection of two lines    
49 Fractran        
49 Seven-sided dice from five-sided dice    
49 Smith numbers    
49 Text processing/1      
48 Determine if a string has all the same characters      
48 Doubly-linked list/Element insertion        
48 Doubly-linked list/Traversal      
48 Greyscale bars/Display        
48 Last letter-first letter            
48 Longest common substring          
48 Make directory path            
48 Move-to-front algorithm        
48 Polymorphic copy          
48 Rate counter          
48 Shoelace formula for polygonal area        
48 Tokenize a string with escaping          
48 Vector              
47 Append a record to the end of a text file              
47 Chaos game          
47 Echo server          
47 Extensible prime generator    
47 Holidays related to Easter            
47 Jaro distance            
47 Metaprogramming            
47 Polynomial regression              
47 Zebra puzzle            
46 Average loop length            
46 Bitmap/Flood fill            
46 Determinant and permanent                
46 Determine if only one instance is running          
46 Egyptian division        
46 History variables              
46 Longest string challenge        
46 Magic 8-ball      
46 Naming conventions            
46 Pascal matrix generation          
46 Sattolo cycle            
46 Search a list of records          
46 Stable marriage problem          
45 Active object            
45 Determine if a string is collapsible        
45 Execute a Markov algorithm          
45 Hofstadter Figure-Figure sequences          
45 Image noise          
45 OpenGL        
45 Password generator            
45 Perfect shuffle          
45 Pig the dice game            
45 Send an unknown method call                
45 Set consolidation            
44 Carmichael 3 strong pseudoprimes      
44 Copy stdin to stdout            
44 Determine if a string has all unique characters      
44 Doubly-linked list/Definition    
44 Element-wise operations              
44 Elementary cellular automaton            
44 GUI/Maximum window dimensions          
44 Kronecker product        
44 McNuggets problem        
44 Narcissist            
44 Polynomial long division              
44 Rosetta Code/Count examples        
44 Sort numbers lexicographically              
44 Sparkline in unicode            
44 Verify distribution uniformity/Naive      
43 Atomic updates          
43 Bitmap/Read a PPM file              
43 Bulls and cows/Player            
43 Generate Chess960 starting position          
43 Keyboard input/Flush the keyboard buffer            
43 Knapsack problem/Bounded              
43 Parsing/Shunting-yard algorithm        
43 RPG attributes generator              
43 Sorting algorithms/Radix sort          
43 Ulam spiral (for primes)            
43 Visualize a tree          
42 Aliquot sequence classifications            
42 Associative array/Merging      
42 Cantor set            
42 Digital root/Multiplicative digital root          
42 Hickerson series of almost integers          
42 MD5/Implementation              
42 Percentage difference between images        
42 Subtractive generator          
42 Van Eck sequence            
42 Voronoi diagram        
41 Bitmap/Midpoint circle algorithm          
41 Calendar - for "REAL" programmers        
41 Combinations and permutations              
41 Currency          
41 Deepcopy            
41 Fusc sequence          
41 Gapful numbers            
41 Hilbert curve          
41 Kernighans large earthquake problem                
41 Nim game            
41 Pascal's triangle/Puzzle          
41 Speech synthesis            
41 Spinning rod animation/Text              
41 Start from a main routine        
41 Sum to 100          
41 Table creation/Postal addresses            
41 Terminal control/Dimensions            
41 Text between            
41 Twelve statements                
41 Variable size/Set          
40 Balanced ternary              
40 Color of a screen pixel      
40 GUI enabling/disabling of controls            
40 Permutations/Derangements          
40 Problem of Apollonius          
40 Secure temporary file            
40 Sorting algorithms/Strand sort            
40 Summarize and say sequence            
40 Variable-length quantity                
40 Water collected between towers            
39 Brace expansion                
39 Casting out nines              
39 Colour pinstripe/Display          
39 Cramer's rule              
39 Inverted index            
39 Parametric polymorphism              
39 S-expressions            
39 Sorting Algorithms/Circle Sort              
39 Taxicab numbers            
39 Topswops                
39 UTF-8 encode and decode              
38 Abbreviations, automatic                  
38 Break OO privacy              
38 Constrained genericity                
38 Euler's identity              
38 Fivenum                  
38 Flipping bits game          
38 ISBN13 check digit            
38 Julia set            
38 Knuth's algorithm S              
38 Musical scale          
38 Parallel calculations          
38 Permutations by swapping          
38 Prime conspiracy            
38 Primorial numbers          
38 Scope/Function names and labels              
38 The Name Game            
37 Chowla numbers                  
37 Create a file on magnetic tape          
37 Feigenbaum constant calculation            
37 Find palindromic numbers in both binary and ternary bases            
37 Kahan summation            
37 LU decomposition                
37 Magic squares of doubly even order              
37 Order disjoint list items              
37 Parsing/RPN to infix conversion          
37 Permutation test                  
37 Pythagorean quadruples            
37 QR decomposition                  
37 Ray-casting algorithm          
37 Sailors, coconuts and a monkey problem              
37 Sort a list of object identifiers                
37 Statistics/Normal distribution              
37 Vampire number        
36 21 game          
36 Abbreviations, easy                
36 Bell numbers              
36 Cuban primes            
36 Days between dates                  
36 Events          
36 Fibonacci word/fractal          
36 File extension is in extensions list            
36 Floyd-Warshall algorithm              
36 Function prototype        
36 Input/Output for lines of text              
36 Input/Output for pairs of numbers            
36 Lychrel numbers            
36 MAC Vendor Lookup              
36 Metered concurrency                
36 Numerical integration/Gauss-Legendre Quadrature                
36 Object serialization                  
36 Pathological floating point problems        
36 Permutations with repetitions            
36 Read a file character by character/UTF8                
36 Square but not cube          
36 Terminal control/Hiding the cursor              
36 Terminal control/Inverse video              
35 Abbreviations, simple                
35 Approximate equality                
35 Bitmap/Bézier curves/Cubic        
35 Bitwise IO              
35 Brazilian numbers              
35 Convex hull                  
35 Find the intersection of a line with a plane                  
35 Largest number divisible by its digits                
35 Loops/Wrong ranges                  
35 MD4            
35 Minesweeper game            
35 Multiline shebang                
35 Penney's game                
35 Pinstripe/Display          
35 Solve the no connection puzzle                
35 Substitution cipher              
35 Terminal control/Unicode output                
35 Test integerness                
35 Truth table              
34 Arithmetic-geometric mean/Calculate Pi                  
34 Conjugate transpose                
34 Display a linear combination              
34 Egyptian fractions                
34 Entropy/Narcissist              
34 Humble numbers              
34 Idiomatically determine all the lowercase and uppercase letters            
34 Long primes                
34 Maze solving          
34 Metronome            
34 Ordered partitions                
34 Remove vowels from a string        
34 Sutherland-Hodgman polygon clipping              
33 Check output device is a terminal                    
33 Continued fraction/Arithmetic/Construct from rational number              
33 Determine if a string is squeezable            
33 Executable library                
33 Integer roots                  
33 Loops/With multiple ranges                
33 Parametrized SQL statement              
33 Parse command-line arguments            
33 Pattern matching                
33 Pentagram                
33 RIPEMD-160                
33 Ranking methods                
33 Recaman's sequence                
33 Rosetta Code/Find bare lang tags                  
33 Square-free integers                
33 Subset sum problem                
33 Topic variable              
33 Totient function                  
32 Bitcoin/address validation                
32 Bitmap/Bézier curves/Quadratic              
32 Cheryl's birthday                
32 Decimal floating point number to binary              
32 Execute SNUSP          
32 Factorions            
32 Galton box animation            
32 Mutex                  
32 Partition an integer x into n primes                
32 Pythagoras tree          
32 Sorting algorithms/Patience sort                
32 Type detection                
32 URL parser              
31 Apply a digital filter (direct form II transposed)                  
31 Bitmap/Histogram                
31 Cycle detection                  
31 Determine if two triangles overlap                
31 Eban numbers                
31 First class environments                
31 Multi-dimensional array            
31 Multiple regression                
31 Multiplicative order                
31 Negative base numbers              
31 Numeric error propagation          
31 RSA code            
31 Resistor mesh                  
31 Rosetta Code/Find unimplemented tasks          
31 Safe primes and unsafe primes            
31 Set puzzle                
31 Straddling checkerboard        
31 Terminal control/Cursor movement                  
31 Textonyms                
31 Write to Windows event log            
30 Check Machin-like formulas                
30 Check input device is a terminal                  
30 Faulhaber's formula                    
30 Faulhaber's triangle              
30 Four is magic            
30 Implicit type conversion                  
30 Keyboard macros        
30 Koch curve            
30 Mersenne primes                
30 Poker hand analyser            
30 Reflection/List properties                
30 Simple database                    
30 Solve a Hidato puzzle                  
30 Use another language to call a function                
30 Xiaolin Wu's line algorithm              
30 Zhang-Suen thinning algorithm            
29 Arena storage pool                  
29 Chaocipher                
29 Chat server                  
29 Checkpoint synchronization                
29 Death Star                
29 Decision tables          
29 Deconvolution/1D                  
29 Dice game probabilities                  
29 Draw a rotating cube            
29 FTP                    
29 HTTPS/Authenticated                
29 Memory layout of a data structure              
29 Mian-Chowla sequence            
29 Modular arithmetic                  
29 Old Russian measure of length              
29 Palindrome dates          
29 Parallel brute force              
29 Perfect totient numbers              
29 Pragmatic directives                
29 Primality by Wilson's theorem              
29 Set of real numbers                
29 Terminal control/Preserve screen                  
29 Window creation/X11                
29 Word break problem                
28 AVL tree                    
28 Bacon cipher                  
28 Bioinformatics/base count          
28 Chemical calculator                    
28 Church numerals                
28 Compiler/lexical analyzer                
28 Diversity prediction theorem                
28 Find first and last set bit of a long integer            
28 Formal power series                  
28 Honeycombs              
28 Jacobi symbol                
28 Sequence: smallest number greater than previous term with exactly n divisors            
28 Sequence: smallest number with exactly n divisors            
28 Stream merge                
28 Strong and weak primes                
28 Verify distribution uniformity/Chi-squared test                  
27 Active Directory/Connect                
27 Burrows–Wheeler transform                    
27 Chebyshev coefficients                    
27 Find largest left truncatable prime in a given base                
27 Go Fish            
27 Isqrt (integer square root) of X              
27 Lah numbers                  
27 Law of cosines - triples              
27 Palindromic gapful numbers              
27 Paraffins                  
27 Peano curve                
27 Polyspiral                
27 Ramsey's theorem                
27 Rosetta Code/Fix code tags            
27 Safe addition                  
27 Sexy primes              
27 Sorting algorithms/Cycle sort                
27 State name puzzle                
27 Sum and product puzzle                  
27 Superellipse                
27 Update a configuration file              
27 Weird numbers                  
27 Yellowstone sequence                
26 Angles (geometric), normalization and conversion                  
26 Birthday problem                  
26 Cut a rectangle                    
26 Distributed programming                
26 Fairshare between two and more                
26 First power of 2 that has leading decimal digits of 12                
26 Gauss-Jordan matrix inversion                  
26 Natural sorting                
26 Nautical bell                
26 Reflection/List methods              
26 Same fringe                
26 Smarandache prime-digital sequence            
26 Super-d numbers                  
26 Table creation                  
26 Thiele's interpolation formula                  
25 A* search algorithm                
25 Card shuffles                    
25 Color wheel                    
25 Create an object at a given address              
25 Fermat numbers                  
25 First perfect square in base n with n unique digits                
25 Fraction reduction                    
25 Idiomatically determine all the characters that can be used for symbols                  
25 Image convolution                  
25 Kronecker product based fractals                
25 Length of an arc between two angles            
25 Machine code                
25 N-smooth numbers                    
25 Nonoblock                  
25 Numbers with prime digits whose sum is 13            
25 RCRPG            
25 Sequence of primorial primes            
25 The ISAAC Cipher                  
25 World Cup group stage                    
24 Abelian sandpile model                
24 Audio alarm              
24 Cipolla's algorithm                
24 Elliptic curve arithmetic                    
24 Generate random chess position                  
24 Hough transform                    
24 K-means++ clustering                
24 Magic squares of singly even order                  
24 Pell's equation                
24 Perlin noise                    
24 Plasma effect              
24 Play recorded sounds              
24 Ramer-Douglas-Peucker line simplification                  
24 Range consolidation                
24 Sierpinski pentagon                  
24 Simulate input/Keyboard              
24 Solve a Holy Knight's tour                
24 Stirling numbers of the second kind                
24 Successive prime differences                  
24 Unprimeable numbers                    
24 Welch's t-test                  
24 Yahoo! search interface                  
24 Zumkeller numbers                    
23 Base58Check encoding                  
23 Circular primes                
23 Deming's Funnel                    
23 Elementary cellular automaton/Random Number Generator                  
23 Fixed length records                    
23 Function frequency                    
23 Main step of GOST 28147-89                  
23 Make a backup file                  
23 Markov chain text generator                  
23 Mind boggling card trick              
23 Minimum positive multiple in base 10 using only 0 and 1                
23 Monads/Maybe monad            
23 Möbius function            
23 Permutations/Rank of a permutation                
23 Record sound                  
23 SOAP            
23 Stirling numbers of the first kind                
23 Superpermutation minimisation                  
23 Teacup rim text                
23 Video display modes                
22 Commatizing numbers                  
22 Create an object/Native demonstration                
22 Find duplicate files                  
22 Intersecting number wheels              
22 Linux CPU utilization                
22 Lucky and even lucky numbers                
22 Numbers with equal rises and falls            
22 Parse an IP Address                  
22 Percolation/Mean run density                
22 Pierpont primes                
22 Reverse the gender of a string                
22 Spelling of ordinal numbers                
22 Tonelli-Shanks algorithm                
22 Total circles area                    
21 Active Directory/Search for a user                    
21 Alternade words                
21 De Bruijn sequences                    
21 Finite state machine                  
21 Hunt the Wumpus              
21 Joystick position                
21 Kolakoski sequence                    
21 List rooted trees                
21 Magnanimous numbers                
21 Matrix chain multiplication                  
21 Next highest int from digits              
21 Orbital elements                    
21 Pig the dice game/Player                  
21 Playfair cipher                  
21 Reflection/Get source            
21 Sorting algorithms/Cocktail sort with shifting bounds                    
21 Window management            
20 Addition chains                    
20 Data Encryption Standard                  
20 Eertree                  
20 Longest common suffix            
20 Mastermind              
20 Median filter                    
20 Native shebang                  
20 Numeric separator syntax                  
20 Random Latin squares              
20 Shortest common supersequence                  
20 Snake and Ladder                    
20 Sokoban                  
20 Solve a Hopido puzzle                  
20 Solve a Numbrix puzzle                  
20 Tau number              
20 UPC                  
20 Vogel's approximation method                    
19 Assertions in design by contract                
19 Bilinear interpolation                    
19 Bioinformatics/Sequence mutation                  
19 Code segment unload                    
19 Color quantization                  
19 Elementary cellular automaton/Infinite length                    
19 Esthetic numbers                
19 Index finite lists of positive integers                  
19 Kosaraju                    
19 Monads/List monad              
19 Montgomery reduction                    
19 N-body problem                  
19 Names to numbers                    
19 Perceptron                  
19 Print debugging statement                    
19 Readline interface                    
19 Simulate input/Mouse              
19 Sunflower fractal              
19 Tau function                
19 Untrusted environment                    
19 Vigenère cipher/Cryptanalysis                    
19 Words containing "the" substring              
18 Abelian sandpile model/Identity                  
18 Arithmetic coding/As a generalized change of radix                  
18 Bitcoin/public point to address                    
18 Canonicalize CIDR                  
18 Compiler/code generator                  
18 Draw pixel 2              
18 EKG sequence convergence                  
18 Extra primes              
18 Find URI in text                  
18 K-d tree                    
18 Knuth's power tree                  
18 Levenshtein distance/Alignment                    
18 Monads/Writer monad                
18 SQL-based authentication                    
18 Selective file copy                
18 Sierpinski arrowhead curve                  
18 Solve triangle solitare puzzle                    
18 Sum data type                  
18 Transportation problem                    
18 Twin primes              
17 15 puzzle solver                
17 ABC words              
17 Compiler/syntax analyzer                  
17 Compiler/virtual machine interpreter                    
17 File size distribution                    
17 Imaginary base numbers                    
17 Increasing gaps between consecutive Niven numbers                    
17 Just in time processing on a character stream                    
17 Mertens function                  
17 Metallic ratios                  
17 Odd words              
17 P-value correction                    
17 Percolation/Site percolation                  
17 Primes - allocate descendants to their ancestors                  
17 Proof                    
17 Self numbers                
17 Separate the house number from the street name                    
17 Word wheel                  
17 Zeckendorf arithmetic                    
16 ASCII art diagram converter                  
16 Aspect oriented programming                
16 Bitmap/Read an image through a pipe                  
16 Changeable words                
16 Chernick's Carmichael numbers                  
16 Free polyominoes enumeration                    
16 HTTPS/Client-authenticated                    
16 Line circle intersection                    
16 Matrix digital rain                    
16 Most frequent k chars distance                
16 NYSIIS                    
16 Nested templated data                    
16 Pancake numbers                
16 Particle swarm optimization                  
16 Polynomial synthetic division                    
16 Prime words              
16 Pseudo-random numbers/PCG32                
16 Self-hosting compiler                  
16 Terminal control/Positional read                  
16 Word search                    
15 Bitmap/PPM conversion through a pipe                    
15 Find words which odd letters are consonants and even letters are vowels or vice versa                
15 Functional coverage tree                  
15 Geometric algebra                  
15 Latin Squares in reduced form                  
15 Mayan numerals                  
15 Nonogram solver                  
15 Numerical integration/Adaptive Simpson's method                    
15 Percolation/Bond percolation                    
15 Percolation/Mean cluster density                    
15 Rendezvous                
15 Retrieve and search chat history                  
15 Singly-linked list/Element removal                
15 Snake                
15 Square root by hand                
15 Suffix tree                  
15 Vibrating rectangles                
14 Biorhythms                    
14 Cistercian numerals                    
14 Compare sorting algorithms' performance                  
14 Compiler/AST interpreter                    
14 Cyclotomic polynomial                    
14 Find if a point is within a triangle                    
14 Four is the number of letters in the ...                    
14 Generalised floating point addition                  
14 Getting the number of decimals                
14 Gradient descent                
14 Jaro-Winkler distance                
14 Logistic curve fitting in epidemiology                    
14 Nimber arithmetic                  
14 Peaceful chess queen armies                    
14 Permutations with some identical elements                    
14 Product of divisors                  
14 Ramanujan's constant                    
14 Rare numbers                  
14 Sum of divisors                  
14 Tarjan                    
14 Topological sort/Extracted top item                    
14 XML validation                  
13 Banker's algorithm                    
13 Calkin-Wilf sequence                
13 Deconvolution/2D+                    
13 Factorial base numbers indexing permutations of a collection                  
13 Long literals, with continuations                    
13 Merge and aggregate datasets                  
13 Pisano period                    
13 Pseudo-random numbers/Splitmix64                  
13 Pseudo-random numbers/Xorshift star                
13 Sequence: nth number with exactly n divisors                    
13 Sine wave                  
13 Ulam numbers                
12 Canny edge detector                    
12 Continued fraction/Arithmetic/G(matrix ng, continued fraction n)                    
12 Greed                    
12 Interactive help                    
12 Longest palindromic substrings                
12 OpenWebNet password                  
12 Partition function P                    
12 Print itself                  
12 Safe mode                    
12 Sierpinski curve                  
12 Simulated annealing                    
12 XXXX redacted                    
11 Almkvist-Giullera formula for pi                    
11 Audio frequency generator                  
11 Exponentiation with infix operators in (or operating on) the base                
11 Geohash                  
11 Launch rocket with countdown and acceleration in stdout                  
11 Minimal steps down to 1                    
11 Pentomino tiling                    
11 Run as a daemon or service                    
11 Sierpinski square curve                    
11 Sorting algorithms/Tree sort on a linked list                    
11 Tetris                  
11 Text completion                    
11 VList                    
10 Catmull–Clark subdivision surface                    
10 Checksumcolor                    
10 Colour pinstripe/Printer                    
10 Combinations with repetitions/Square digit chain                    
10 Execute CopyPasta Language                    
10 External sort                    
10 Faces from a mesh                    
10 Minkowski question-mark function                  
10 One-time pad                    
10 Penrose tiling                    
10 Powerful numbers                    
10 Railway circuit                    
10 Resistance calculator                    
10 SHA-256 Merkle tree                    
10 Spoof game                  
10 Time-based one-time password algorithm                    
10 Unit testing                    
10 Using a speech engine to highlight words                
9 Curve that touches three points                  
9 Display an outline as a nested table                  
9 Fibonacci matrix-exponentiation                    
9 French Republican calendar                  
9 Hourglass puzzle                    
9 IPC via named pipe                    
9 Morpion solitaire                  
9 Non-transitive dice                  
9 Parse EBNF                    
9 Pinstripe/Printer                    
9 Quoting constructs                  
9 Rosetta Code/Tasks without examples                    
9 Starting a web browser                    
9 Suffixation of decimal numbers                    
9 Text to HTML                    
9 Three word location                    
9 War card game                    
8 Graph colouring                    
8 Multidimensional Newton-Raphson method                    
8 Numerical and alphabetical suffixes                    
8 Pseudo-random numbers/Combined recursive generator MRG32k3a                    
8 Range modifications                    
8 Resistance network calculator                    
8 Rosetta Code/Rank languages by number of users                    
8 Sort an outline at every level                  
8 Tree datastructures                    
8 Two bullet roulette                    
8 User defined pipe and redirection operators                  
7 16 puzzle game                
7 Brace expansion using ranges                  
7 Compiler/Verifying syntax                    
7 Count the coins/0-1                    
7 Elliptic Curve Digital Signature Algorithm                  
7 Fibonacci heap                    
7 Mayan calendar                    
7 Pseudorandom number generator image                    
7 Robots                    
7 URL shortener                    
6 Continued fraction/Arithmetic/G(matrix ng, continued fraction n1, continued fraction n2)                    
6 Doubly-linked list/Element removal                    
6 OpenGL pixel shader                  
6 OpenGL/Utah Teapot                    
6 Recursive descent parser generator                    
6 Rosetta Code/Run examples                    
6 Smallest enclosing circle problem                    
5 Addition-chain exponentiation                    
5 Audio overlap loop                  
5 Black Box                  
5 Boids                    
5 Chess player                    
5 Hexapawn                  
5 I'm a software engineer, get me out of here                  
5 Price list behind API                    
5 Process SMIL directives in XML data                    
5 Raster bars                    
5 Remote agent/Agent interface                    
5 Remote agent/Agent logic                    
5 Remote agent/Simulation                    
5 Solve a Rubik's Cube                    
5 Terminal control/Restricted width positional input/No wrapping                    
5 Terminal control/Restricted width positional input/With wrapping                    
5 Waveform analysis/Doh ray me                    
4 Generalised floating point multiplication                  
4 OLE automation                  
4 Strassen's algorithm                    
4 Tamagotchi emulator                    
4 Unicode polynomial equation                    
4 Using the Meetup.com API                  
4 Weather routing                    
3 Latin Squares in reduced form/Randomizing using Jacobson and Matthews’ Technique                  
3 Rosetta Code/List authors of task descriptions                    
3 Solving coin problems                    
3 Ukkonen’s suffix tree construction                    
3 Vidir                    
3 Waveform analysis/Top and tail                    
3 WiktionaryDumps to words                    
2 15 puzzle game in 3D                  
2 CLI-based maze-game                    
2 IRC gateway                    
1 Blackjack strategy