Rosetta Code/Count examples/Full list/Tier 4

Revision as of 23:01, 14 February 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 Ring          ㉝ FreeBASIC     ㉞ AutoHotkey    ㉟ F_Sharp      
    ㊱ Clojure       ㊲ ALGOL_68      ㊳ Unicon        ㊴ OCaml         ㊵ Fortran      
As of 2021-02-14T22:58:43Z :: Tasks: 1087 :: Draft Tasks:234 :: Total Tasks: 1321 :: Total Examples: 73111
Count Task
480 Hello world/Text
318 99 bottles of beer
313 100 doors
311 FizzBuzz
285 Factorial
285 Fibonacci sequence
272 Comments
264 A+B
258 Empty program
238 Function definition
229 Loops/Infinite
224 Loops/While
224 Reverse a string
223 Arrays
219 Ackermann function
206 Loops/For
200 Conditional structures  
197 Greatest common divisor
196 Arithmetic/Integer
195 Greatest element of a list
186 Repeat a string
185 Array concatenation
184 Even or odd
184 Integer comparison
183 Averages/Arithmetic mean
181 Increment a numerical string
177 Hello world/Graphical
172 Copy a string
168 Boolean values
168 Loops/Downward for
166 Sieve of Eratosthenes
165 Apply a callback to an array
165 String concatenation
164 Character codes
164 Loops/N plus one half
163 Loops/Do-while  
163 Loops/For with a specified step
162 Array length
162 Hello world/Newline omission
162 Loops/Foreach
162 Sum and product of an array
160 Binary digits
160 String length
159 Loops/Break  
158 Integer sequence
158 Palindrome detection
157 String case
157 Towers of Hanoi
155 Sum of a series
155 Tokenize a string  
154 Generic swap
153 Dot product
153 Leap year
152 Empty string
152 Hailstone sequence
152 Logical operations
152 Rot-13
152 Sum of squares
148 Associative array/Creation    
148 Filter
147 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
142 Roman numerals/Encode
141 System time
140 Caesar cipher
140 Determine if a string is numeric
140 Loop over multiple arrays simultaneously
140 Remove duplicate elements
140 User input/Text
139 File input/output
138 Sorting algorithms/Quicksort
137 Primality by trial division
136 Day of the week
136 Hello world/Standard error
135 Bitwise operations
135 Command-line arguments
135 Luhn test of credit card numbers
133 Read entire file
132 Create a file
132 Loops/Continue
131 Stack
131 Substring
130 Generate lower case ASCII alphabet
130 Sleep
129 Literals/String  
129 Mutual recursion
128 Check that file exists
128 Happy numbers
128 Pascal's triangle
127 Date format
127 Flatten a list
126 Least common multiple
126 Zero to the zero power
125 ABC problem
124 Program termination
123 Balanced brackets
123 Binary search  
123 Literals/Integer
121 Compound data type
121 Ethiopian multiplication
121 Include a file  
121 Loops/Nested  
120 Detect division by zero
120 Function composition  
120 Knuth shuffle
120 Variables  
119 Associative array/Iteration    
119 Formatted numeric output
118 Averages/Root mean square
118 Null object  
118 Read a file line by line
117 Count occurrences of a substring
117 Mandelbrot set
117 N-queens problem
116 Anagrams
116 File size
116 Hash from two arrays      
116 Roman numerals/Decode
116 Search a list
115 Classes  
115 Count in octal
115 Multiplication tables
115 Sorting algorithms/Insertion sort
114 Case-sensitivity of identifiers
114 Delete a file
114 Guess the number/With feedback
114 Real constants and functions
113 Identity matrix
113 Matrix multiplication  
113 Matrix transposition
112 Babbage problem    
112 Environment variables
112 Input loop
112 Pick random element
112 String matching
111 Align columns  
111 Averages/Median
111 Find limit of recursion
111 Hostname  
111 Random numbers
110 Letter frequency
110 Perfect numbers
110 Rename a file
109 Arithmetic/Complex  
109 HTTP    
109 Haversine formula
109 Pangram checker
109 Return multiple values
108 Accumulator factory  
107 Conway's Game of Life  
107 Infinity    
106 Catalan numbers
106 Permutations
106 Temperature conversion
105 Assertions    
105 Horner's rule for polynomial evaluation
105 Program name
105 Variadic function    
104 Anonymous recursion
104 Arithmetic-geometric mean
104 Averages/Pythagorean means
104 Levenshtein distance    
104 Run-length encoding
103 Evaluate binomial coefficients
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 Queue/Definition  
102 Regular expressions    
101 Nth root
101 String append
100 Combinations
100 Reverse words in a string  
100 String interpolation (included)
100 Strip whitespace from a string/Top and tail
100 Trigonometric functions
100 Zig-zag matrix
99 Comma quibbling  
99 Sierpinski triangle  
99 Sorting algorithms/Merge sort  
98 Ordered words
98 Shell one-liner  
98 Short-circuit evaluation
97 24 game  
97 Bulls and cows  
97 Interactive programming        
97 Sorting algorithms/Selection sort
97 Sum multiples of 3 and 5
96 Call a function  
96 Middle three digits  
96 Y combinator          
95 Arbitrary-precision integers (included)    
95 Create a two-dimensional array at runtime
95 Power set  
95 Range expansion
94 Collections  
94 Enumerations
94 Range extraction
94 String prepend
93 Inheritance/Single      
93 Sorting algorithms/Gnome sort
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 MD5    
92 Time a function  
91 Averages/Mode  
91 One-dimensional cellular automata  
91 Sequence of non-squares
91 Sierpinski carpet  
91 Sorting algorithms/Cocktail sort    
91 Sum digits of an integer
91 The Twelve Days of Christmas  
90 JSON          
90 Walk a directory/Non-recursively    
89 Averages/Simple moving average
89 Cumulative standard deviation  
89 N'th
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
87 Entropy
87 Josephus problem    
87 Sorting algorithms/Bogosort  
87 String comparison  
87 Symmetric difference  
86 Hamming numbers  
86 Harshad or Niven series  
85 Abstract type        
85 CSV data manipulation
85 Five weekends
85 Gray code  
85 Greatest subsequential sum
85 Number names  
84 Abundant, deficient and perfect number classifications      
84 CSV to HTML translation  
84 Hello world/Newbie      
84 Map range  
84 Price fraction
84 Queue/Usage    
84 Tree traversal    
84 Window creation  
83 Compare a list of strings  
83 Menu  
83 Sort an array of composite structures
82 Closures/Value capture      
82 File modification time
82 Last Friday of each month      
82 Non-decimal radices/Convert    
82 Simple windowed application      
82 Sorting algorithms/Heapsort
81 Monte Carlo methods
81 Number reversal game    
81 Walk a directory/Recursively    
80 Box the compass
80 Catamorphism  
80 Hofstadter Q sequence  
80 Introspection    
80 Literals/Floating point        
80 SEDOLs
79 Amicable pairs      
79 Calculating the value of e    
79 Count the coins  
79 Long multiplication    
79 Singly-linked list/Traversal    
79 Terminal control/Clear the screen      
79 URL decoding      
79 Web scraping      
78 Count in factors
78 Hello world/Line printer  
78 Read a specific line from a file  
78 Roots of unity    
78 Set    
78 Show the epoch    
78 Spiral matrix
78 Top rank per group    
78 XML/Input        
77 Address of a variable          
77 Bitmap    
77 CRC-32  
77 Call an object method      
77 Concurrent computing      
77 Find common directory path  
77 Floyd's triangle
77 Knapsack problem/0-1          
77 Multifactorial    
77 Order two numerical lists    
77 Playing cards    
77 Sockets          
77 Sorting algorithms/Shell sort    
77 Terminal control/Ringing the terminal bell        
76 Date manipulation      
76 Keyboard input/Obtain a Y or N response  
76 Linear congruential generator      
76 Pythagorean triples  
76 Word wrap  
75 Almost prime  
75 Dynamic variable names          
75 Jensen's Device    
75 Kaprekar numbers    
75 Lucas-Lehmer test      
75 Man or boy test      
75 Operator precedence    
75 Proper divisors      
75 Sorting algorithms/Counting sort    
75 Strip comments from a string
75 URL encoding      
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 Non-decimal radices/Output
74 Parsing/RPN calculator algorithm    
73 Anagrams/Deranged anagrams  
73 Fibonacci n-step number sequences  
73 Hello world/Web server          
73 Munchausen numbers      
73 SHA-1      
73 Sorting algorithms/Comb sort      
73 Soundex    
73 Unicode variable names      
72 Calendar  
72 Exceptions/Catch an exception thrown in a nested call        
72 Multiple distinct objects    
72 Phrase reversals      
72 Pi  
72 Read a configuration file      
72 Repeat        
72 SHA-256    
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 Execute HQ9+  
71 Gamma function  
71 Longest common subsequence
71 Special characters      
71 Sudoku    
71 Take notes on the command line        
71 Write entire file    
70 Bitmap/Bresenham's line algorithm  
70 Convert seconds to compound duration  
70 Enforced immutability  
70 Polymorphism      
70 Rock-paper-scissors  
69 Call a foreign-language function        
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 Population count      
69 Quaternion type      
69 Show ASCII table      
69 Sort disjoint sublist      
69 Stair-climbing puzzle      
69 Vigenère cipher  
69 Write float arrays to a text file      
68 15 puzzle game      
68 Catalan numbers/Pascal's triangle      
68 Combinations with repetitions    
68 Constrained random points on a circle
68 Horizontal sundial calculations    
68 Maze generation      
68 Numerical integration      
68 Self-describing numbers        
68 Sorting algorithms/Stooge sort  
68 Trabb Pardo–Knuth algorithm    
68 Zeckendorf number representation    
67 Closest-pair problem  
67 Currying        
67 Euler method  
67 Extend your language        
67 Fork          
67 Fractal tree    
67 Jump anywhere            
67 Largest int from concatenated ints
67 Old lady swallowed a fly          
67 Priority queue      
67 Text processing/Max licenses in use      
66 Arithmetic/Rational      
66 Benford's law  
66 Chinese remainder theorem        
66 Magic squares of odd order        
66 Named parameters      
66 Nested function      
65 Amb    
65 One of n lines in a file    
65 Optional parameters    
65 Runtime evaluation            
65 Sort stability    
65 Special variables      
65 Unix/ls          
65 Variable size/Get      
64 Barnsley fern        
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 Remove lines from a file  
64 Sorting algorithms/Pancake sort
64 XML/Output          
63 Memory allocation          
63 Narcissistic decimal number    
63 Pernicious numbers      
63 Roots of a function    
63 Sequence of primes by trial division        
63 Singly-linked list/Element insertion    
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 Non-decimal radices/Input  
62 Probabilistic choice  
62 Reduced row echelon form      
62 Roots of a quadratic function    
62 Thue-Morse        
62 Undefined values      
62 Write language name in 3D ASCII        
61 Angle difference between two bearings        
61 Animate a pendulum      
61 Circles of given radius through two points      
61 Exponentiation order        
61 Get system command output          
61 Rep-string      
61 Semiprime      
61 Sorting algorithms/Sleep sort          
61 Van der Corput sequence      
60 Arithmetic evaluation    
60 Binary strings          
60 Department numbers    
60 Globally replace text in several files        
60 Knapsack problem/Continuous          
60 Modular exponentiation      
60 Plot coordinate pairs      
60 Runge-Kutta method      
59 24 game/Solve      
59 9 billion names of God the integer          
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 Partial function application        
59 Test a function    
59 Tic-tac-toe        
59 Unicode strings              
59 User input/Graphical          
59 Word frequency        
58 Brownian tree      
58 Emirp primes    
58 Generator/Exponential        
58 Hash join          
58 Huffman coding      
58 Jewels and stones        
58 Knight's tour        
58 Miller–Rabin primality test    
58 Odd word problem    
58 Truncatable primes      
58 Yin and yang        
57 4-rings or 4-squares puzzle        
57 Add a variable to a class instance at runtime            
57 Bitmap/Write a PPM file              
57 Compile-time calculation          
57 Deal cards for FreeCell      
57 Delegates            
57 Draw a cuboid          
57 I before E except after C      
57 JortSort      
57 Left factorials      
57 Leonardo numbers        
57 Matrix-exponentiation operator          
57 Sort three variables      
57 Sorting algorithms/Bead sort        
57 Two sum  
56 2048    
56 Doubly-linked list/Element definition      
56 Extract file extension      
56 Fibonacci word    
56 Integer overflow          
56 LZW compression        
56 Random number generator (device)          
56 Rosetta Code/Rank languages by popularity          
56 Scope modifiers            
56 Singleton                
56 Stem-and-leaf plot  
56 Stern-Brocot sequence      
56 Terminal control/Coloured text        
55 Base64 encode data              
55 Cartesian product of two or more lists        
55 DNS query            
55 Define a primitive data type        
55 Dinesman's multiple-dwelling problem    
55 Discordian date        
55 Extreme floating point values        
55 Forest fire
55 Ludic numbers    
55 Mad Libs      
55 Multisplit      
55 Sorting algorithms/Permutation sort        
55 Stack traces        
55 Terminal control/Display an extended character              
54 100 prisoners          
54 CUSIP      
54 Damm algorithm      
54 Grayscale image          
54 Long year        
54 Longest common prefix          
54 Munching squares            
54 Runtime evaluation/In an environment          
54 Sierpinski triangle/Graphical        
54 Synchronous concurrency          
54 Topological sort          
54 Truncate a file      
54 XML/XPath              
53 Abundant odd numbers          
53 Convert decimal number to rational          
53 Draw a pixel        
53 Handle a signal          
53 Maximum triangle path sum      
53 Modulinos          
53 Non-continuous subsequences    
53 Pointers and references        
53 Quickselect algorithm    
53 Send email          
53 Subleq                
53 Terminal control/Cursor positioning        
53 Ternary logic      
53 Unbias a random generator      
53 XML/DOM serialization            
52 Bernoulli numbers          
52 First-class functions/Use numbers analogously          
52 Inverted syntax          
52 Iterated digits squaring            
52 Keyboard input/Keypress check        
52 Longest increasing subsequence        
52 Statistics/Basic            
52 Text processing/2      
51 Gaussian elimination        
51 Loops/Increment loop index within loop body          
51 Wireworld      
50 Archimedean spiral          
50 Attractive numbers          
50 Base64 decode data                
50 Call a function in a shared library            
50 Chinese zodiac        
50 Colour bars/Display          
50 Determine if a string has all the same characters    
50 Dijkstra's algorithm    
50 Dining philosophers              
50 Farey sequence                
50 GUI component interaction            
50 Heronian triangles        
50 Longest common substring            
50 Respond to an unknown method call              
50 Seven-sided dice from five-sided dice    
50 Strip block comments        
50 Universal Turing machine          
50 Validate International Securities Identification Number            
49 FASTA format          
49 Find the intersection of two lines    
49 Fractran      
49 Last letter-first letter            
49 Make directory path          
49 Polynomial regression              
49 Smith numbers      
49 Text processing/1      
49 Tokenize a string with escaping        
48 Determine if a string is collapsible        
48 Doubly-linked list/Element insertion        
48 Doubly-linked list/Traversal        
48 Greyscale bars/Display        
48 Jaro distance            
48 Magic 8-ball      
48 Metaprogramming            
48 Move-to-front algorithm        
48 Polymorphic copy        
48 Rate counter            
48 Sattolo cycle          
48 Shoelace formula for polygonal area        
48 Vector            
47 Append a record to the end of a text file              
47 Chaos game          
47 Determinant and permanent                
47 Echo server            
47 Extensible prime generator      
47 Holidays related to Easter            
47 Kernighans large earthquake problem                
47 Longest string challenge        
47 Naming conventions            
47 Pascal matrix generation            
47 Pig the dice game          
47 Search a list of records        
47 Stable marriage problem          
47 Zebra puzzle            
46 Average loop length            
46 Bitmap/Flood fill              
46 Determine if only one instance is running          
46 Egyptian division        
46 History variables              
46 Kronecker product          
46 Perfect shuffle          
46 Polynomial long division            
46 Water collected between towers            
45 Active object              
45 Execute a Markov algorithm          
45 Hofstadter Figure-Figure sequences          
45 Image noise          
45 McNuggets problem        
45 OpenGL        
45 Parsing/Shunting-yard algorithm      
45 Password generator            
45 Send an unknown method call                
45 Set consolidation          
45 Square but not cube        
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 Generate Chess960 starting position          
44 Narcissist            
44 RPG attributes generator              
44 Rosetta Code/Count examples        
44 Sort numbers lexicographically                
44 Sparkline in unicode            
44 Ulam spiral (for primes)            
44 Verify distribution uniformity/Naive      
43 Associative array/Merging      
43 Atomic updates            
43 Bitmap/Read a PPM file              
43 Bulls and cows/Player              
43 ISBN13 check digit          
43 Keyboard input/Flush the keyboard buffer              
43 Knapsack problem/Bounded              
43 MD5/Implementation              
43 Sorting algorithms/Radix sort            
43 Visualize a tree          
42 Aliquot sequence classifications            
42 Cantor set            
42 Digital root/Multiplicative digital root          
42 Hickerson series of almost integers          
42 Nim game            
42 Percentage difference between images        
42 Subtractive generator        
42 Twelve statements                
42 Van Eck sequence            
42 Voronoi diagram        
41 Balanced ternary            
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 Pascal's triangle/Puzzle            
41 Permutations/Derangements            
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 Variable size/Set            
40 Color of a screen pixel        
40 GUI enabling/disabling of controls              
40 Inverted index          
40 Problem of Apollonius          
40 S-expressions          
40 Secure temporary file            
40 Sorting algorithms/Strand sort            
40 Summarize and say sequence            
40 Truth table              
40 Variable-length quantity              
39 Abbreviations, automatic                  
39 Brace expansion                
39 Casting out nines              
39 Colour pinstripe/Display          
39 Cramer's rule              
39 Fivenum                  
39 Julia set            
39 Knuth's algorithm S            
39 Magic squares of doubly even order                
39 Parametric polymorphism            
39 Parsing/RPN to infix conversion          
39 Permutations by swapping          
39 Prime conspiracy            
39 Remove vowels from a string      
39 Sorting Algorithms/Circle Sort              
39 Taxicab numbers            
39 The Name Game            
39 Topswops                
39 UTF-8 encode and decode                
38 Break OO privacy            
38 Constrained genericity              
38 Euler's identity            
38 Flipping bits game        
38 LU decomposition                
38 Musical scale          
38 Order disjoint list items              
38 Parallel calculations            
38 Permutation test                    
38 Permutations with repetitions            
38 Primorial numbers          
38 Pythagorean quadruples            
38 Scope/Function names and labels              
37 Abbreviations, easy              
37 Bell numbers              
37 Chowla numbers                  
37 Create a file on magnetic tape          
37 Cuban primes            
37 Feigenbaum constant calculation            
37 Find palindromic numbers in both binary and ternary bases            
37 Kahan summation            
37 Loops/Wrong ranges                  
37 Lychrel numbers            
37 MAC Vendor Lookup              
37 MD4            
37 Metered concurrency                  
37 Object serialization                
37 QR decomposition                  
37 Ray-casting algorithm          
37 Read a file character by character/UTF8                
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, simple              
36 Convex hull                  
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 Metronome              
36 Numerical integration/Gauss-Legendre Quadrature              
36 Pathological floating point problems        
36 Ranking methods                
36 Solve the no connection puzzle                
36 Terminal control/Hiding the cursor                
36 Terminal control/Inverse video              
35 Approximate equality                
35 Arithmetic-geometric mean/Calculate Pi                
35 Bitmap/Bézier curves/Cubic        
35 Bitwise IO              
35 Brazilian numbers              
35 Find the intersection of a line with a plane                  
35 Humble numbers              
35 Largest number divisible by its digits                
35 Long primes                
35 Maze solving            
35 Minesweeper game            
35 Multiline shebang              
35 Penney's game                
35 Pinstripe/Display            
35 Substitution cipher              
35 Sutherland-Hodgman polygon clipping              
35 Terminal control/Unicode output                
35 Test integerness                
34 Conjugate transpose                
34 Determine if a string is squeezable            
34 Display a linear combination                
34 Egyptian fractions                
34 Entropy/Narcissist              
34 Idiomatically determine all the lowercase and uppercase letters            
34 Loops/With multiple ranges                  
34 Ordered partitions                
34 Pentagram                
34 RIPEMD-160                
34 Square-free integers                
34 Totient function                  
33 Check output device is a terminal                  
33 Continued fraction/Arithmetic/Construct from rational number              
33 Executable library                
33 Integer roots                  
33 Multiple regression                
33 Parametrized SQL statement                
33 Parse command-line arguments            
33 Pattern matching              
33 RSA code            
33 Recaman's sequence                
33 Rosetta Code/Find bare lang tags                  
33 Subset sum problem              
33 Topic variable              
32 Bitcoin/address validation                  
32 Bitmap/Bézier curves/Quadratic              
32 Cheryl's birthday                
32 Decimal floating point number to binary            
32 Eban numbers                
32 Execute SNUSP        
32 Factorions          
32 Galton box animation              
32 Isqrt (integer square root) of X              
32 Mertens function              
32 Mutex                  
32 Negative base numbers              
32 Partition an integer x into n primes                
32 Primality by Wilson's theorem              
32 Pythagoras tree            
32 Safe primes and unsafe primes            
32 Sorting algorithms/Patience sort              
32 Straddling checkerboard          
32 Type detection                
32 URL parser              
31 Apply a digital filter (direct form II transposed)                  
31 Bitmap/Histogram                
31 Church numerals              
31 Cycle detection                  
31 Determine if two triangles overlap                
31 First class environments                
31 Keyboard macros          
31 Lah numbers                  
31 Multi-dimensional array            
31 Multiplicative order                
31 Numeric error propagation          
31 Old Russian measure of length              
31 Resistor mesh                  
31 Rosetta Code/Find unimplemented tasks          
31 Set puzzle                
31 Solve a Hidato puzzle                  
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 Deconvolution/1D                  
30 Dice game probabilities                  
30 FTP                    
30 Faulhaber's formula                    
30 Faulhaber's triangle              
30 Four is magic            
30 Implicit type conversion                  
30 Koch curve            
30 Mersenne primes                
30 Mian-Chowla sequence            
30 Palindrome dates          
30 Perfect totient numbers              
30 Poker hand analyser            
30 Reflection/List properties                
30 Simple database                    
30 Use another language to call a function              
30 Xiaolin Wu's line algorithm                
30 Zhang-Suen thinning algorithm            
29 Arena storage pool                  
29 Bioinformatics/base count            
29 Chaocipher                
29 Chat server                  
29 Checkpoint synchronization                  
29 Death Star                
29 Decision tables          
29 Diversity prediction theorem                
29 Draw a rotating cube            
29 Gauss-Jordan matrix inversion                  
29 HTTPS/Authenticated                
29 Jacobi symbol                
29 Memory layout of a data structure            
29 Modular arithmetic                  
29 Parallel brute force                
29 Pragmatic directives                
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 Chemical calculator                    
28 Compiler/lexical analyzer                
28 Find first and last set bit of a long integer            
28 Find largest left truncatable prime in a given base                
28 Formal power series                  
28 Honeycombs                
28 Sequence: smallest number greater than previous term with exactly n divisors            
28 Sequence: smallest number with exactly n divisors            
28 State name puzzle                
28 Stream merge                
28 Strong and weak primes                
28 Sum and product puzzle                  
28 Update a configuration file              
28 Verify distribution uniformity/Chi-squared test                
27 Active Directory/Connect                
27 Burrows–Wheeler transform                    
27 Chebyshev coefficients                    
27 Go Fish            
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 Superellipse                
27 Weird numbers                  
27 World Cup group stage                    
27 Yellowstone sequence                
26 Angles (geometric), normalization and conversion                  
26 Birthday problem                  
26 Cut a rectangle                    
26 Distributed programming              
26 Extra primes              
26 Fairshare between two and more                
26 First power of 2 that has leading decimal digits of 12                
26 Image convolution                
26 Kronecker product based fractals                
26 Machine code                  
26 Natural sorting                
26 Nautical bell                
26 Perlin noise                  
26 Reflection/List methods              
26 Same fringe              
26 Smarandache prime-digital sequence            
26 Super-d numbers                  
26 Table creation                  
26 Thiele's interpolation formula                
26 Zumkeller numbers                  
25 A* search algorithm              
25 Card shuffles                    
25 Color wheel                    
25 Create an object at a given address                
25 Elliptic curve arithmetic                  
25 Fermat numbers                  
25 First perfect square in base n with n unique digits                
25 Fraction reduction                    
25 Generate random chess position                  
25 Idiomatically determine all the characters that can be used for symbols                  
25 Length of an arc between two angles            
25 Magic squares of singly even order                  
25 Möbius function          
25 N-smooth numbers                    
25 Nonoblock                  
25 Numbers with prime digits whose sum is 13            
25 RCRPG              
25 Sequence of primorial primes            
25 Solve a Holy Knight's tour                
25 Stirling numbers of the first kind                
25 Stirling numbers of the second kind                
25 The ISAAC Cipher                  
25 Tonelli-Shanks algorithm                
25 Welch's t-test                  
24 Abelian sandpile model                
24 Audio alarm            
24 Cipolla's algorithm                
24 Hough transform                    
24 K-means++ clustering                
24 Mind boggling card trick              
24 Pell's equation                
24 Plasma effect              
24 Play recorded sounds                
24 Ramer-Douglas-Peucker line simplification                  
24 Range consolidation                
24 Sierpinski pentagon                  
24 Simulate input/Keyboard              
24 Successive prime differences                  
24 Unprimeable numbers                    
24 Yahoo! search interface                  
23 Base58Check encoding                  
23 Circular primes                
23 Create an object/Native demonstration                
23 Deming's Funnel                    
23 Elementary cellular automaton/Random Number Generator                  
23 Fixed length records                    
23 Function frequency                    
23 Hunt the Wumpus              
23 Intersecting number wheels              
23 List rooted trees                
23 Lucky and even lucky numbers                
23 Main step of GOST 28147-89                  
23 Make a backup file                  
23 Markov chain text generator                  
23 Minimum positive multiple in base 10 using only 0 and 1                
23 Monads/Maybe monad            
23 Numbers with equal rises and falls            
23 Percolation/Mean run density                
23 Permutations/Rank of a permutation                
23 Record sound                
23 SOAP              
23 Superpermutation minimisation                  
23 Teacup rim text                
23 Total circles area                    
23 Video display modes                
22 Commatizing numbers                  
22 Find duplicate files                  
22 Find words with alternating vowels and consonants            
22 Finite state machine                  
22 Increasing gaps between consecutive Niven numbers                  
22 Kolakoski sequence                    
22 Linux CPU utilization                
22 Matrix chain multiplication                  
22 Parse an IP Address                  
22 Pierpont primes                
22 Reverse the gender of a string                
22 Snake and Ladder                  
22 Spelling of ordinal numbers                
21 Active Directory/Search for a user                    
21 Alternade words                
21 De Bruijn sequences                    
21 Joystick position                
21 Kosaraju                    
21 Magnanimous numbers                
21 Mastermind              
21 Mayan numerals                  
21 Median filter                  
21 Next highest int from digits              
21 Numeric separator syntax                
21 Orbital elements                    
21 Pig the dice game/Player                  
21 Playfair cipher                  
21 Reflection/Get source            
21 Solve a Hopido puzzle                  
21 Solve a Numbrix puzzle                  
21 Sorting algorithms/Cocktail sort with shifting bounds                    
21 Window management              
20 Addition chains                    
20 Assertions in design by contract                
20 Data Encryption Standard                  
20 Eertree                  
20 Esthetic numbers                
20 Index finite lists of positive integers                  
20 Levenshtein distance/Alignment                    
20 Longest common suffix            
20 Native shebang                
20 Pseudo-random numbers/PCG32                
20 Random Latin squares              
20 Shortest common supersequence                  
20 Sokoban                
20 Tau number              
20 UPC                  
20 Vigenère cipher/Cryptanalysis                  
20 Vogel's approximation method                    
20 Words containing "the" substring              
19 ASCII art diagram converter                  
19 Bilinear interpolation                    
19 Bioinformatics/Sequence mutation                  
19 Code segment unload                    
19 Color quantization                  
19 Elementary cellular automaton/Infinite length                    
19 K-d tree                    
19 Knuth's power tree                  
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 Word wheel                  
18 ABC words              
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 Find URI in text                  
18 Find words which contains more than 3 e vowels                
18 Imaginary base numbers                    
18 Line circle intersection                    
18 Metallic ratios                  
18 Monads/Writer monad                
18 Pancake numbers                
18 Percolation/Site percolation                  
18 Pseudo-random numbers/Xorshift star                
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              
18 Ulam numbers                
17 15 puzzle solver                
17 Cistercian numerals                  
17 Compiler/syntax analyzer                  
17 Compiler/virtual machine interpreter                    
17 File size distribution                    
17 Just in time processing on a character stream                    
17 Long literals, with continuations                    
17 Matrix digital rain                    
17 NYSIIS                    
17 Odd words              
17 P-value correction                    
17 Polynomial synthetic division                    
17 Prime words              
17 Primes - allocate descendants to their ancestors                  
17 Product of divisors                
17 Proof                  
17 Self numbers                
17 Separate the house number from the street name                    
17 Sum of divisors                
17 Zeckendorf arithmetic                    
16 Aspect oriented programming                
16 Bin given limits                    
16 Biorhythms                  
16 Bitmap/Read an image through a pipe                
16 Changeable words                
16 Chernick's Carmichael numbers                  
16 Find if a point is within a triangle                    
16 Free polyominoes enumeration                    
16 HTTPS/Client-authenticated                    
16 Latin Squares in reduced form                  
16 Most frequent k chars distance                
16 Nested templated data                    
16 Nimber arithmetic                  
16 Particle swarm optimization                  
16 Percolation/Bond percolation                    
16 Percolation/Mean cluster density                    
16 Pseudo-random numbers/Splitmix64                  
16 Self-hosting compiler                  
16 Tarjan                    
16 Terminal control/Positional read                  
16 Vibrating rectangles                
16 Word search                    
15 Bitmap/PPM conversion through a pipe                  
15 Cyclotomic polynomial                    
15 Functional coverage tree                  
15 Geometric algebra                  
15 Getting the number of decimals                
15 Merge and aggregate datasets                  
15 Nonogram solver                  
15 Numerical integration/Adaptive Simpson's method                    
15 Rare numbers                  
15 Rendezvous                
15 Retrieve and search chat history                  
15 Singly-linked list/Element removal                
15 Snake              
15 Square root by hand                
15 Suffix tree                  
14 Calkin-Wilf sequence                
14 Compare sorting algorithms' performance                  
14 Compiler/AST interpreter                    
14 Four is the number of letters in the ...                    
14 Generalised floating point addition                  
14 Gradient descent                
14 Jaro-Winkler distance                
14 Logistic curve fitting in epidemiology                    
14 Partition function P                    
14 Peaceful chess queen armies                    
14 Permutations with some identical elements                    
14 Ramanujan's constant                    
14 Topological sort/Extracted top item                    
14 Words from neighbour ones                
14 XML validation                  
13 Banker's algorithm                    
13 Deconvolution/2D+                    
13 Exponentiation with infix operators in (or operating on) the base                
13 Factorial base numbers indexing permutations of a collection                  
13 Pisano period                    
13 Sequence: nth number with exactly n divisors                    
13 Sine wave                
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 Print itself                  
12 Safe mode                    
12 Sierpinski curve                  
12 Simulated annealing                    
12 Sorting algorithms/Tree sort on a linked list                    
12 XXXX redacted                    
11 Almkvist-Giullera formula for pi                    
11 Audio frequency generator                  
11 Find words which first and last three letters are equals                  
11 Geohash                  
11 Launch rocket with countdown and acceleration in stdout                  
11 Minimal steps down to 1                    
11 Pentomino tiling                    
11 Railway circuit                    
11 Run as a daemon or service                    
11 SHA-256 Merkle tree                    
11 Sierpinski square curve                    
11 Tetris                  
11 Text completion                    
11 VList                    
10 Catmull–Clark subdivision surface                  
10 Change e letters to i in words                
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 Pseudo-random numbers/Combined recursive generator MRG32k3a                    
10 Resistance calculator                    
10 Spoof game                  
10 Three word location                    
10 Time-based one-time password algorithm                    
10 Tree from nesting levels                    
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 Graph colouring                    
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 Tree datastructures                    
9 Two bullet roulette                    
9 War card game                    
8 Count the coins/0-1                    
8 Multidimensional Newton-Raphson method                    
8 Numerical and alphabetical suffixes                    
8 Range modifications                    
8 Resistance network calculator                    
8 Rosetta Code/Rank languages by number of users                    
8 Sort an outline at every level                  
8 User defined pipe and redirection operators                  
7 16 puzzle game                
7 Brace expansion using ranges                  
7 Compiler/Verifying syntax                    
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 I'm a software engineer, get me out of here                  
6 OpenGL pixel shader                  
6 OpenGL/Utah Teapot                    
6 Price list behind API                    
6 Recursive descent parser generator                    
6 Remote agent/Agent logic                    
6 Remote agent/Simulation                    
6 Rosetta Code/Run examples                    
6 Smallest enclosing circle problem                    
6 Untouchable numbers                  
5 Addition-chain exponentiation                    
5 Audio overlap loop                  
5 Bioinformatics/global alignment                    
5 Black Box                  
5 Boids                    
5 Chess player                    
5 Hexapawn                  
5 Process SMIL directives in XML data                    
5 Raster bars                    
5 Remote agent/Agent interface                    
5 Solve a Rubik's Cube                    
5 Strassen's algorithm                    
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 P-Adic numbers, basic                  
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 Random sentence from book                  
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                    
2 P-Adic square roots                  
1 Blackjack strategy                    
1 Filter words