Rosetta Code/Count examples/Full list/Tier 4

Revision as of 20:27, 24 July 2022 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 Jq            ㉜ PicoLisp      ㉝ ALGOL_68      ㉞ F_Sharp       ㉟ Ring         
    ㊱ AutoHotkey    ㊲ JavaScript    ㊳ Common_Lisp   ㊴ AWK           ㊵ PureBasic    
As of 2022-07-24T20:13:36Z :: Tasks: 1188 :: Draft Tasks:369 :: Total Tasks: 1557 :: Total Examples: 87451
Count Task
532 Hello world/Text
349 99 bottles of beer
336 FizzBuzz
332 100 doors
310 Fibonacci sequence
300 Factorial
291 Comments
281 A+B
276 Empty program
253 Function definition
242 Loops/Infinite
238 Arrays
238 Loops/While
236 Ackermann function
236 Reverse a string
229 Loops/For
218 Conditional structures
216 Greatest common divisor
209 Greatest element of a list
207 Arithmetic/Integer
205 Array concatenation
204 Even or odd
194 Repeat a string
193 Integer comparison
192 Increment a numerical string
191 Sieve of Eratosthenes
190 Averages/Arithmetic mean
187 Copy a string
187 Hello world/Graphical
183 Array length
182 Binary digits
181 Loops/Downward for
179 Boolean values
179 Towers of Hanoi
178 String concatenation
177 Character codes
175 Apply a callback to an array
175 Generic swap
175 Sum and product of an array
174 Hello world/Newline omission
173 Integer sequence
172 Loops/Do-while
172 String length
171 Loops/For with a specified step
171 Loops/N plus one half
171 Palindrome detection
171 Rot-13
170 Empty string
170 String case
170 Tokenize a string
169 Loops/Foreach
168 Loops/Break
168 Sum of a series
166 Dot product
165 Leap year
165 Quine
164 Sum of squares
162 Logical operations
161 Hailstone sequence
159 Filter
158 Associative array/Creation
157 Factors of an integer
155 Roman numerals/Encode
155 Sorting algorithms/Bubble sort
153 Caesar cipher
153 Sort an integer array
152 Execute a system command
152 System time
151 Loop over multiple arrays simultaneously
151 Remove duplicate elements
150 Higher-order functions
150 Luhn test of credit card numbers
149 Sorting algorithms/Quicksort
149 Stack
148 Guess the number
147 Determine if a string is numeric
147 Generate lower case ASCII alphabet
147 Primality by trial division
146 User input/Text
145 Command-line arguments
145 Day of the week
145 Zero to the zero power
144 File input/output
144 Happy numbers
144 Substring
143 Bitwise operations
143 Read entire file
142 Hello world/Standard error
142 Least common multiple
142 Loops/Continue
142 Mutual recursion
141 Check that file exists
138 Create a file
138 Sleep
137 ABC problem
136 Variables
135 Balanced brackets
135 Date format
135 Literals/String
135 Pascal's triangle
134 Count in octal
134 Ethiopian multiplication
134 Flatten a list
133 Binary search
133 Program termination
132 Include a file O
131 Literals/Integer
131 Roman numerals/Decode
130 Compound data type
129 Function composition
129 Knuth shuffle
129 Mandelbrot set
128 Loops/Nested
128 N-queens problem
127 Multiplication tables
126 Anagrams
126 Count occurrences of a substring
126 Matrix transposition
126 Sorting algorithms/Insertion sort
125 Align columns
125 Associative array/Iteration
125 Averages/Root mean square
125 Detect division by zero O
125 Pick random element
125 Read a file line by line
125 Real constants and functions
124 Formatted numeric output
124 String matching
123 Guess the number/With feedback
123 Letter frequency
123 Matrix multiplication
123 Return multiple values
123 Strip a set of characters from a string
122 Haversine formula
122 Identity matrix
122 Null object
122 Pangram checker
121 Assertions
121 Babbage problem
121 Case-sensitivity of identifiers
121 Hash from two arrays
121 Search a list
120 Averages/Median
120 Classes O
120 Conway's Game of Life
120 File size
120 Look-and-say sequence
120 Perfect numbers
120 Permutations
118 Delete a file
118 Environment variables
118 Find limit of recursion
117 Input loop
117 Sierpinski triangle
116 Catalan numbers
115 Arithmetic/Complex
115 Call a function
115 HTTP
115 String append
114 Infinity
114 String interpolation (included)
114 Temperature conversion
113 Anonymous recursion O
113 Random numbers
113 Rename a file
113 Reverse words in a string
113 Variadic function
112 Evaluate binomial coefficients
112 Horner's rule for polynomial evaluation
112 Levenshtein distance
112 Run-length encoding
112 Substring/Top and tail
111 Accumulator factory
111 Arithmetic-geometric mean
111 Harshad or Niven series
111 Hostname
110 Bulls and cows
110 The Twelve Days of Christmas
109 Averages/Pythagorean means
109 Nth root
109 Program name
109 Strip whitespace from a string/Top and tail
109 Sum multiples of 3 and 5
108 Comma quibbling
108 N'th
108 Sorting algorithms/Merge sort
108 Zig-zag matrix
107 Create a two-dimensional array at runtime
107 Ordered words
107 Prime decomposition
107 Queue/Definition
107 Vector products
106 Combinations
106 Exceptions
106 Sierpinski carpet
105 Digital root
105 Middle three digits
105 Regular expressions
105 Sequence of non-squares
105 Sorting algorithms/Selection sort
105 Sum digits of an integer
105 Trigonometric functions
104 24 game
104 String prepend
103 Enumerations
103 Shell one-liner O
102 Abundant, deficient and perfect number classifications
102 Amicable pairs
102 Power set
101 Arbitrary-precision integers (included) O O
101 Evolutionary algorithm
101 Execute Brain****
101 Short-circuit evaluation
100 Sorting algorithms/Gnome sort
100 Walk a directory/Non-recursively O
100 Y combinator O
99 Almost prime
99 Collections
99 Create an HTML table
99 Range extraction
98 Calculating the value of e
98 Interactive programming (repl) O O O
98 Range expansion
98 Time a function
97 MD5
97 One-dimensional cellular automata
97 Sort using a custom comparator
97 Symmetric difference
96 Averages/Mode
96 Dragon curve O
96 Exponentiation operator
96 Hello world/Newbie
96 Hofstadter Q sequence
96 Map range
96 Sorting algorithms/Cocktail sort
95 First-class functions O O
95 Hamming numbers
95 Random number generator (included)
95 String comparison
94 Entropy
94 Monty Hall problem
94 Number reversal game
93 Averages/Simple moving average
93 Catamorphism
93 Forward difference
93 Gray code
93 Inheritance/Single O O
93 Price fraction
93 Sorting algorithms/Heapsort
93 Tree traversal
92 CSV data manipulation
92 Cumulative standard deviation
92 JSON
92 Last Friday of each month
92 Number names
92 Sorting algorithms/Bogosort
91 Langton's ant
91 Menu
91 Simple windowed application O
91 Terminal control/Clear the screen
90 Abstract type O O O
90 Compare a list of strings
90 Greatest subsequential sum
90 Josephus problem
89 Address of a variable O O
89 Five weekends
89 Floyd's triangle
89 Repeat
89 Show ASCII table
88 Set
88 Sort an array of composite structures
88 Split a character string based on change of character
88 URL decoding
88 Window creation
87 Anti-primes
87 Count in factors
87 Find the last Sunday of each month
87 Literals/Floating point
87 Non-decimal radices/Convert
87 Queue/Usage
86 Box the compass
86 CSV to HTML translation
86 Modular inverse
86 Monte Carlo methods
86 Munchausen numbers
86 Order two numerical lists
86 Top rank per group
86 Walk a directory/Recursively
86 Word wrap
85 Hello world/Line printer
85 Read a specific line from a file
85 SEDOLs
85 Sorting algorithms/Shell sort
84 Bitmap O
84 Closures/Value capture O
84 Count the coins
84 File modification time
84 Here document
84 Playing cards
84 Proper divisors
83 CRC-32
83 Department numbers
83 Find common directory path
83 Introspection
83 Operator precedence
83 Pythagorean triples
83 Singly-linked list/Traversal
83 Spiral matrix
83 Terminal control/Ringing the terminal bell
83 URL encoding
82 Find the missing permutation
82 Knapsack problem/0-1
82 Lucas-Lehmer test
82 Multifactorial
82 Population count
81 Anagrams/Deranged anagrams
81 Concurrent computing O
81 Dynamic variable names O O
81 Extend your language O
81 Jump anywhere O O
81 Show the epoch O
81 Sockets
81 Sorting algorithms/Counting sort
81 Soundex
81 Web scraping
80 Animation O
80 Fibonacci n-step number sequences
80 Kaprekar numbers
80 Keyboard input/Obtain a Y or N response
80 Linear congruential generator
80 Long multiplication
80 Man or boy test
80 Pi
80 Roots of unity
80 Sorting algorithms/Comb sort
79 Angle difference between two bearings
79 Date manipulation
79 Jensen's Device
79 Phrase reversals
79 Semordnilap
79 Strip comments from a string
79 Take notes on the command line
79 Trabb Pardo–Knuth algorithm
79 Unicode variable names O
79 XML/Input
78 100 prisoners
78 15 puzzle game
78 Call an object method O
78 Convert seconds to compound duration
78 Empty directory
78 Equilibrium index
78 Execute HQ9+
78 Gamma function
78 Guess the number/With feedback (player)
78 Magic squares of odd order
78 Parsing/RPN calculator algorithm
78 Priority queue
78 SHA-1
78 Sort disjoint sublist
78 Sudoku
78 Write entire file
78 Zeckendorf number representation
77 Averages/Mean angle
77 Hello world/Web server
77 List comprehensions
77 Old lady swallowed a fly
77 Rep-string
77 Rock-paper-scissors
77 Singly-linked list/Element definition
77 Special characters
77 Thue-Morse
76 Calendar
76 Call a foreign-language function
76 Euler's sum of powers conjecture
76 Flow-control structures
76 Non-decimal radices/Output
76 Quaternion type
76 Read a configuration file
76 Square but not cube
76 Vigenère cipher
75 AKS test for primes
75 Combinations with repetitions
75 Draw a sphere
75 Enforced immutability O
75 Multiple distinct objects
75 Pernicious numbers
75 Unix/ls
74 Additive primes
74 Attractive numbers
74 Benford's law
74 Currying
74 Four bit adder
74 SHA-256
74 Special variables
74 Stair-climbing puzzle
74 Write float arrays to a text file
73 Bitmap/Bresenham's line algorithm O
73 Damm algorithm
73 Exceptions/Catch an exception thrown in a nested call
73 Fractal tree
73 Longest common subsequence
73 Sequence of primes by trial division
73 Sort three variables
73 Van der Corput sequence
72 Arithmetic/Rational
72 Barnsley fern
72 General FizzBuzz
72 Horizontal sundial calculations
72 I before E except after C
72 IBAN
72 Jewels and stones
72 Largest int from concatenated ints
72 Maze generation
72 Narcissistic decimal number
72 Sorting algorithms/Stooge sort
71 Amb
71 Catalan numbers/Pascal's triangle
71 Chinese remainder theorem
71 Fast Fourier transform
71 Fork O O
71 Get system command output
71 Numerical integration
71 Polymorphism
71 Self-describing numbers
71 Sorting algorithms/Pancake sort
71 Text processing/Max licenses in use
70 Closest-pair problem
70 Constrained random points on a circle
70 Host introspection O
70 Morse code
70 Named parameters O O
70 Nested function
70 Runtime evaluation O
70 Stern-Brocot sequence
70 Van Eck sequence
70 Yin and yang
69 Abundant odd numbers
69 Euler method
69 Exponentiation order
69 One of n lines in a file
69 Probabilistic choice
69 Singly-linked list/Element insertion
69 Strip control codes and extended characters from a string
69 Tic-tac-toe
69 Variable size/Get O O
69 Word frequency
68 Best shuffle
68 Circles of given radius through two points
68 Continued fraction
68 ISBN13 check digit
68 Remove lines from a file
68 Sort stability
67 Animate a pendulum
67 Documentation
67 Extract file extension
67 Factors of a Mersenne number
67 Gapful numbers
67 Integer overflow
67 Memory allocation O O
67 Plot coordinate pairs
67 Roots of a function
67 Write language name in 3D ASCII
66 9 billion names of God the integer
66 Binary strings
66 CUSIP
66 Determine if a string is collapsible
66 HTTPS
66 Hofstadter-Conway $10,000 sequence
66 Inheritance/Multiple O O
66 McNuggets problem
66 Optional parameters
66 Reduced row echelon form
66 Semiprime
66 Two sum
66 XML/Output
65 Cholesky decomposition
65 Dutch national flag problem
65 Globally replace text in several files
65 Knight's tour
65 Magic 8-ball
65 Modular exponentiation
65 RPG attributes generator
65 Roots of a quadratic function
65 Runge-Kutta method
65 Subleq
65 Undefined values
64 Averages/Mean time of day
64 Bitmap/Write a PPM file
64 Cartesian product of two or more lists
64 Compile-time calculation O O O
64 Isqrt (integer square root) of X
64 Leonardo numbers
64 Long year
64 Miller–Rabin primality test
64 Quickselect algorithm
64 Smith numbers
64 Sorting algorithms/Sleep sort
64 Test a function
63 24 game/Solve
63 4-rings or 4-squares puzzle
63 Arithmetic evaluation
63 Chinese zodiac
63 Copy stdin to stdout
63 Determine if a string has all the same characters
63 Emirp primes
63 Huffman coding
63 JortSort
63 Knapsack problem/Continuous
63 Longest common prefix
63 Ludic numbers
63 Mouse position O
63 Non-decimal radices/Input
63 Terminal control/Display an extended character
62 2048
62 Draw a clock
62 Generator/Exponential
62 Knapsack problem/Unbounded
62 Mad Libs
62 Partial function application
62 Truncatable primes
61 Brownian tree
61 Define a primitive data type O
61 Draw a cuboid
61 Sorting algorithms/Bead sort
61 Ternary logic
61 Unicode strings
61 User input/Graphical O
61 Vector
60 Add a variable to a class instance at runtime O O O O
60 Base64 decode data
60 FASTA format
60 Fibonacci word
60 Kernighans large earthquake problem
60 Left factorials
60 Matrix-exponentiation operator
60 Munching squares
60 Pascal matrix generation
60 Topological sort
60 Truncate a file
60 Two identical strings
59 Base64 encode data
59 Cantor set
59 DNS query
59 Deal cards for FreeCell
59 Doubly-linked list/Element definition
59 Draw a pixel
59 Grayscale image O
59 Multisplit
59 Nim game
59 Pointers and references O
59 Random number generator (device)
59 Sattolo cycle
59 Scope modifiers O
59 Stem-and-leaf plot
59 Tau function
59 Terminal control/Coloured text
59 Tokenize a string with escaping
58 Dinesman's multiple-dwelling problem
58 Discordian date
58 Forest fire
58 Fusc sequence
58 Hash join
58 Iterated digits squaring
58 LZW compression
58 Longest common substring
58 Odd word problem
58 Remove vowels from a string
58 Singleton O
58 Sorting algorithms/Permutation sort
58 Terminal control/Cursor positioning
58 Unbias a random generator
58 Universal Turing machine
57 Associative array/Merging
57 Bernoulli numbers
57 Convert decimal number to rational
57 Delegates O
57 Dijkstra's algorithm
57 Farey sequence
57 Keyboard input/Keypress check
57 Loops/Increment loop index within loop body
57 Perfect shuffle
57 Rosetta Code/Rank languages by popularity
57 Runtime evaluation/In an environment
56 Archimedean spiral
56 Call a function in a shared library
56 Extreme floating point values
56 Handle a signal
56 Inverted syntax O O O
56 Largest proper divisor of n
56 Maximum triangle path sum
56 Modulinos
56 Stack traces O
56 Statistics/Basic
56 Sum of divisors
56 Validate International Securities Identification Number
56 XML/XPath
55 Abbreviations, automatic
55 Determine if a string has all unique characters
55 Find the intersection of two lines
55 Loops/With multiple ranges
55 Non-continuous subsequences
55 Password generator
55 Pig the dice game
55 Primality by Wilson's theorem
55 Search a list of records
55 Send email O
55 Seven-sided dice from five-sided dice
55 Shoelace formula for polygonal area
55 Sort numbers lexicographically
55 Strip block comments
55 Sum of first n cubes
55 Synchronous concurrency O
55 XML/DOM serialization
54 Bell numbers
54 Chaos game
54 Determine if a string is squeezable
54 First-class functions/Use numbers analogously O O
54 Move-to-front algorithm
54 Polynomial regression
54 Rate counter
54 Recaman's sequence
54 Tau number
54 Text processing/2
54 Water collected between towers
54 Wireworld
53 Days between dates
53 Dining philosophers
53 Doubly-linked list/Element insertion
53 Egyptian division
53 Fractran
53 Gaussian elimination
53 Heronian triangles
53 Hofstadter Figure-Figure sequences
53 Jaro similarity
53 Kronecker product
53 Longest increasing subsequence
53 Naming conventions
53 Sierpinski triangle/Graphical
53 Strange plus numbers
53 Words containing "the" substring
53 Zebra puzzle
52 Colour bars/Display
52 Convex hull
52 Determinant and permanent
52 Doubly-linked list/Traversal
52 Extensible prime generator
52 Greyscale bars/Display
52 Holidays related to Easter
52 Longest string challenge
52 Make directory path
52 Metaprogramming O O
52 Text processing/1
51 Aliquot sequence classifications
51 Append a record to the end of a text file
51 Average loop length
51 Execute a Markov algorithm
51 GUI component interaction O
51 Respond to an unknown method call O O O
51 Text between
50 Digital root/Multiplicative digital root
50 Echo server
50 Floyd-Warshall algorithm
50 Last letter-first letter
50 Perfect totient numbers
50 Sparkline in unicode
50 Stable marriage problem
50 Taxicab numbers
50 Totient function
50 Visualize a tree
49 Bitmap/Flood fill O
49 Chowla numbers
49 Doubly-linked list/Definition
49 Element-wise operations
49 History variables O
49 Mertens function
49 Musical scale
49 OpenGL O
49 Polymorphic copy O O
49 Polynomial long division
49 Sorting algorithms/Radix sort
49 Ulam spiral (for primes)
49 Verify distribution uniformity/Naive
48 21 game
48 Abbreviations, easy
48 Active object O
48 Bioinformatics/base count
48 Determine if only one instance is running
48 Elementary cellular automaton
48 Generate Chess960 starting position
48 Hilbert curve
48 Image noise O
48 Send an unknown method call
48 Start from a main routine O
48 Sum of the digits of n is substring of n
48 The Name Game
48 Variable size/Set O O
47 Bitmap/Midpoint circle algorithm O
47 Bitmap/Read a PPM file O
47 Currency
47 Deepcopy
47 Halt and catch fire
47 Narcissist
47 Permutations/Derangements
47 Problem of Apollonius
47 Set consolidation
47 Spinning rod animation/Text
47 Sum to 100
47 UTF-8 encode and decode
46 Approximate equality
46 Bulls and cows/Player
46 Casting out nines
46 Color of a screen pixel O
46 Colour pinstripe/Display O
46 Compiler/lexical analyzer
46 Flipping bits game
46 GUI/Maximum window dimensions O
46 Keyboard input/Flush the keyboard buffer
46 Knapsack problem/Bounded
46 Parsing/Shunting-yard algorithm
46 Rosetta Code/Count examples
46 Sorting Algorithms/Circle Sort
46 Speech synthesis
46 Subtractive generator
46 Terminal control/Dimensions
46 Twelve statements
45 ABC words
45 Atomic updates O O
45 Brazilian numbers
45 Carmichael 3 strong pseudoprimes
45 Fivenum
45 Loops/Wrong ranges
45 Numbers divisible by their individual digits, but not by the product of their digits.
45 Permutations by swapping
45 Sailors, coconuts and a monkey problem
45 Secure temporary file
45 Smallest square that begins with n
45 Sorting algorithms/Patience sort
45 Strange numbers
45 Substitution cipher
45 Truth table
44 Balanced ternary
44 Base 16 numbers needing a to f
44 Coprimes
44 Cycle detection
44 Find words which contains more than 3 e vowels
44 Hickerson series of almost integers
44 Idiomatically determine all the lowercase and uppercase letters
44 Julia set
44 Long primes
44 MAC Vendor Lookup
44 MD5/Implementation
44 Pascal's triangle/Puzzle
44 Percentage difference between images O
44 Ranking methods
44 Read a file character by character/UTF8 O
44 S-expressions
44 Sort a list of object identifiers
44 Special divisors
44 Summarize and say sequence
44 Type detection
44 Voronoi diagram
44 Yellowstone sequence
43 Abbreviations, simple
43 Combinations and permutations
43 Cramer's rule
43 Euler's identity
43 Feigenbaum constant calculation
43 Humble numbers
43 Inverted index
43 Lah numbers
43 Largest number divisible by its digits
43 Primorial numbers
43 Pythagorean quadruples
43 Safe primes and unsafe primes
43 Table creation/Postal addresses
43 Terminal control/Inverse video
42 Brace expansion
42 Calendar - for "REAL" programmers
42 File extension is in extensions list
42 Find the intersection of a line with a plane
42 Four is magic
42 GUI enabling/disabling of controls O
42 Input/Output for lines of text
42 Input/Output for pairs of numbers
42 Magic squares of doubly even order
42 Parallel calculations O O
42 Permutations with repetitions
42 Prime conspiracy
42 Scope/Function names and labels
42 Sequence: smallest number with exactly n divisors
42 Statistics/Normal distribution
42 Topswops
42 Triplet of three numbers
42 Variable-length quantity
41 Cheryl's birthday
41 Compare length of two strings
41 Count how many vowels and consonants occur in a string
41 Create a file on magnetic tape O
41 Display a linear combination
41 Factorions
41 Find words which contains all the vowels
41 Function prototype O O O
41 Kahan summation
41 Knuth's algorithm S
41 Maze solving
41 Metered concurrency
41 Nice primes
41 Palindrome dates
41 Parametric polymorphism O
41 Permutation test
41 Product of divisors
41 Ray-casting algorithm
41 Rosetta Code/Find bare lang tags
41 Sorting algorithms/Strand sort
41 Terminal control/Hiding the cursor
41 Vampire number
40 Bitwise IO O
40 Cuban primes
40 Find palindromic numbers in both binary and ternary bases
40 Integer roots
40 Koch curve
40 LU decomposition
40 Lychrel numbers
40 Multiple regression
40 Numbers which binary and ternary digit sum are prime
40 Pathological floating point problems
40 Penney's game
40 Pentagram
40 Primes whose sum of digits is 25
40 Pythagoras tree
40 QR decomposition
40 Sequence: smallest number greater than previous term with exactly n divisors
40 Solve the no connection puzzle
40 Test integerness
39 Apply a digital filter (direct form II transposed)
39 Break OO privacy O
39 Check output device is a terminal
39 Cousin primes
39 Events
39 Extra primes
39 Fibonacci word/fractal
39 Matrix with two diagonals
39 Metronome
39 Minesweeper game
39 Multi-dimensional array O
39 Mutex
39 Order disjoint list items
39 Parsing/RPN to infix conversion
39 Shift list elements to left by 3
39 Sutherland-Hodgman polygon clipping
39 Terminal control/Unicode output
39 Unique characters
38 Arithmetic-geometric mean/Calculate Pi
38 Bitmap/Bézier curves/Cubic O
38 Church numerals
38 Constrained genericity O O
38 Continued fraction/Arithmetic/Construct from rational number
38 Create an object at a given address O O
38 Determine if two triangles overlap
38 Digit fifth powers
38 Entropy/Narcissist
38 Find prime n such that reversed n is also prime
38 Find prime numbers of the form n*n*n+2
38 Find words with alternating vowels and consonants
38 Frobenius numbers
38 Longest common suffix
38 Minimum number of cells after, before, above and below NxN squares
38 Numerical integration/Gauss-Legendre Quadrature
38 Odd and square numbers
38 Pinstripe/Display
38 RSA code
38 Square-free integers
38 Subset sum problem
38 Sum of elements below main diagonal of matrix
37 AVL tree
37 Algebraic data types
37 Bacon cipher
37 Chaocipher
37 Circular primes
37 Conjugate transpose
37 Diversity prediction theorem
37 Eban numbers
37 Length of an arc between two angles
37 MD4
37 Machine code
37 Mersenne primes
37 Multiline shebang
37 Möbius function
37 Negative base numbers
37 Object serialization O O
37 Old Russian measure of length
37 Ordered partitions
37 Smarandache prime-digital sequence
37 Strong and weak primes
37 Successive prime differences
36 Alternade words
36 Change e letters to i in words
36 Dice game probabilities
36 Draw a rotating cube
36 Egyptian fractions
36 Faulhaber's triangle
36 First power of 2 that has leading decimal digits of 12
36 Gauss-Jordan matrix inversion
36 Modular arithmetic
36 Parameterized SQL statement
36 Pell's equation
36 Poker hand analyser
36 RIPEMD-160
36 Terminal control/Preserve screen
36 Word wheel
36 Zumkeller numbers
35 Angles (geometric), normalization and conversion
35 Death Star O
35 Decimal floating point number to binary
35 Find words whose first and last three letters are equal
35 Galton box animation
35 Minimum positive multiple in base 10 using only 0 and 1
35 Partition an integer x into n primes
35 Peano curve
35 Polyspiral
35 Reflection/List properties
35 Set puzzle
35 Solve a Hidato puzzle
35 Sorting algorithms/Cycle sort
35 Superellipse
35 Textonyms
35 Topic variable
35 URL parser
35 Use another language to call a function
35 Zhang-Suen thinning algorithm
34 Bitmap/Bézier curves/Quadratic O
34 Bitmap/Histogram O
34 Calkin-Wilf sequence
34 Check input device is a terminal
34 FTP
34 Implicit type conversion
34 Mian-Chowla sequence
34 Multiplicative order
34 Numbers with equal rises and falls
34 Numbers with prime digits whose sum is 13
34 Parallel brute force
34 Parse command-line arguments
34 Pseudo-random numbers/Middle-square method
34 Sexy primes
34 Sort the letters of string in alphabetical order
34 Straddling checkerboard
34 Strange unique prime triplets
34 Terminal control/Cursor movement
34 Twin primes
34 Unprimeable numbers
34 Weird numbers
34 Word break problem
34 Write to Windows event log
34 Xiaolin Wu's line algorithm
33 10001th prime
33 Bin given limits
33 Bitcoin/address validation
33 Burrows–Wheeler transform
33 Chat server O
33 Checkpoint synchronization
33 Code Golf: Code Golf
33 Common list elements
33 Decision tables
33 Esthetic numbers
33 Executable library
33 Fairshare between two and more
33 Find first missing positive
33 Go Fish
33 Jacobi symbol
33 Law of cosines - triples
33 Long literals, with continuations
33 Mayan numerals
33 Numbers in base-16 representation that cannot be written with decimal digits
33 Partition function P
33 Perlin noise
33 Pierpont primes
33 Pragmatic directives O
33 Primes with digits in nondecreasing order
33 Resistor mesh
33 Rosetta Code/Find unimplemented tasks
33 Set of real numbers
33 Show the (decimal) value of a number of 1s appended with a 3, then squared
33 Simple database
33 Super-d numbers
33 Wieferich primes
32 Chemical calculator
32 Common sorted list
32 Deconvolution/1D
32 Execute SNUSP
32 Faulhaber's formula
32 Find first and last set bit of a long integer
32 Find square difference
32 Generate random numbers without repeating a value
32 Keyboard macros
32 Nonoblock
32 Numbers with same digit set in base 10 and base 16
32 Numeric error propagation
32 Range consolidation
32 Rosetta Code/Fix code tags
32 Stirling numbers of the second kind
32 Sum and product puzzle
32 Verify distribution uniformity/Chi-squared test
32 Video display modes
32 Window creation/X11 O O O
31 A* search algorithm
31 Abelian sandpile model
31 Arena storage pool
31 Chebyshev coefficients
31 Check Machin-like formulas
31 Color wheel
31 Compiler/virtual machine interpreter
31 Finite state machine
31 First class environments
31 Generate random chess position
31 HTTPS/Authenticated
31 Hunt the Wumpus
31 Magnanimous numbers
31 Memory layout of a data structure O O O
31 Minimum numbers of three lists
31 Plasma effect
31 Ramsey's theorem
31 State name puzzle
31 Stirling numbers of the first kind
31 Stream merge
31 Summarize primes
31 Sylvester's sequence
31 Update a configuration file
31 Words from neighbour ones
30 Bioinformatics/Sequence mutation
30 Birthday problem
30 De Bruijn sequences
30 Distinct power numbers
30 Doomsday rule
30 Fermat numbers
30 Find if a point is within a triangle
30 Formal power series
30 Honeycombs O
30 Increasing gaps between consecutive Niven numbers
30 Kronecker product based fractals
30 Maximum difference between adjacent elements of list
30 Motzkin numbers
30 N-smooth numbers
30 Random Latin squares
30 Reflection/List methods
30 Sierpinski pentagon
30 Table creation
30 Teacup rim text
30 Unique characters in each string
29 Active Directory/Connect O
29 Cut a rectangle
29 Find largest left truncatable prime in a given base
29 Find minimum number of coins that make a given value
29 First 9 prime Fibonacci number
29 First perfect square in base n with n unique digits
29 Fraction reduction
29 Harmonic series
29 Merge and aggregate datasets
29 Monads/Maybe monad
29 Natural sorting
29 Safe addition
29 Same fringe
29 Shortest common supersequence
29 Solve a Holy Knight's tour
29 Sorting algorithms/Cocktail sort with shifting bounds
29 Sunflower fractal
29 Superpermutation minimisation
29 The ISAAC cipher
29 Thiele's interpolation formula
29 World Cup group stage
28 Almkvist-Giullera formula for pi
28 Biorhythms
28 Card shuffles
28 Changeable words
28 Cipolla's algorithm
28 Day of the week of Christmas and New Year
28 Distributed programming
28 Find squares n where n+1 is prime
28 Fixed length records
28 Image convolution
28 Intersecting number wheels
28 Minimum multiple of m where digital sum equals m
28 Nautical bell
28 Next highest int from digits
28 Odd words
28 Order by pair comparisons
28 Palindromic gapful numbers
28 Paraffins
28 Piprimes
28 Pseudo-random numbers/PCG32
28 Sierpinski arrowhead curve
28 Snake and ladder
28 Tonelli-Shanks algorithm
28 Welch's t-test
28 Yahoo! search interface
27 Audio alarm
27 Base58Check encoding
27 Cistercian numerals
27 Coprime triplets
27 Elliptic curve arithmetic
27 Erdős-primes
27 Exactly three adjacent 3 in lists
27 Function frequency
27 Idiomatically determine all the characters that can be used for symbols
27 Kolakoski sequence
27 Largest five adjacent number
27 Last list item
27 Make a backup file
27 Matrix chain multiplication
27 Mind boggling card trick
27 Monads/List monad
27 Mosaic matrix
27 Neighbour primes
27 Numbers in base 10 that are palindromic in bases 2, 4, and 16
27 Numeric separator syntax
27 Percolation/Mean run density
27 Play recorded sounds
27 Ramer-Douglas-Peucker line simplification
27 Self numbers
27 Sequence of primorial primes
27 Simulate input/Keyboard
27 Sleeping Beauty problem
27 Sum of primes in odd positions is prime
27 Sum of square and cube digits of an integer are primes
27 Total circles area
27 UPC
26 Consecutive primes with ascending or descending differences
26 Deming's funnel
26 Exponentiation with infix operators in (or operating on) the base
26 Find words which contain the most consonants
26 Hough transform
26 K-means++ clustering
26 Largest prime factor
26 Linux CPU utilization
26 List rooted trees
26 Lucky and even lucky numbers
26 Magic squares of singly even order
26 Markov chain text generator
26 Orbital elements
26 Padovan sequence
26 Palindromic primes
26 Parse an IP Address
26 Permutations/Rank of a permutation
26 Playfair cipher
26 Positive decimal integers with the digit 1 occurring exactly twice
26 RCRPG
26 Reverse the gender of a string
26 Special neighbor primes
26 Spelling of ordinal numbers
26 Summation of primes
25 15 puzzle solver
25 ASCII art diagram converter
25 Abelian sandpile model/Identity
25 Append numbers at same position in strings
25 Create an object/Native demonstration O O O
25 Elementary cellular automaton/Random number generator
25 File size distribution
25 Index finite lists of positive integers
25 Joystick position O
25 Kosaraju
25 Mastermind
25 Next special primes
25 Odd squarefree semiprimes
25 Palindromic primes in base 16
25 Prime numbers which contain 123
25 Prime triplets
25 Pseudo-random numbers/Xorshift star
25 Record sound O
25 Reflection/Get source
25 Reverse the order of lines in a text file while preserving the contents of each line
25 SOAP
25 Sine wave
25 Smallest power of 6 whose decimal expansion contains n
25 Snake
25 Solve a Hopido puzzle
25 Solve a Numbrix puzzle
25 Ulam numbers
24 Active Directory/Search for a user O
24 Addition chains
24 Ascending primes
24 Assertions in design by contract
24 Bilinear interpolation
24 Canonicalize CIDR
24 Commatizing numbers
24 Compiler/syntax analyzer
24 EKG sequence convergence
24 Find duplicate files
24 Levenshtein distance/Alignment
24 Main step of GOST 28147-89
24 Native shebang
24 Perceptron
24 Permuted multiples
24 Prime words
24 Print debugging statement
24 Quadrat special primes
24 Rare numbers
24 Sequence: nth number with exactly n divisors
24 Smallest multiple
24 Sokoban
24 Solve triangle solitare puzzle
24 Steady squares
24 Sum data type
24 Untrusted environment
23 Arithmetic numbers
23 Compiler/code generator
23 Concatenate two primes is also prime
23 Find adjacent primes which differ by a square integer
23 Four sides of square
23 Knuth's power tree
23 Latin Squares in reduced form
23 Line circle intersection
23 Longest substrings without repeating characters
23 Median filter
23 N-body problem
23 Names to numbers
23 Nested templated data
23 Pig the dice game/Player
23 Polynomial synthetic division
23 Pseudo-random numbers/Splitmix64
23 Sierpinski curve
23 Singly-linked list/Element removal
23 Substring primes
23 Sudan function
23 Useless instructions
23 Variable declaration reset
23 Vibrating rectangles
23 Vigenère cipher/Cryptanalysis
23 Vogel's approximation method
23 Wilson primes of order n
23 Zeckendorf arithmetic
22 Bitcoin/public point to address
22 Cubic special primes
22 Data Encryption Standard
22 Descending primes
22 Eertree
22 Elementary cellular automaton/Infinite length
22 Getting the number of decimals
22 Jacobsthal numbers
22 Matrix digital rain
22 Metallic ratios
22 Monads/Writer monad
22 Montgomery reduction
22 Nonogram solver
22 Numbers whose count of divisors is prime
22 Peaceful chess queen armies
22 Primes whose first and last number is 3
22 Pseudo-random numbers/Combined recursive generator MRG32k3a
22 Selective file copy
22 Simulate input/Mouse O
22 The sieve of Sundaram
22 Window management O
21 Arithmetic coding/As a generalized change of radix
21 Cullen and Woodall numbers
21 Cyclotomic polynomial
21 Disarium numbers
21 Draw pixel 2
21 Imaginary base numbers
21 Jaro-Winkler distance
21 Juggler sequence
21 Just in time processing on a character stream
21 K-d tree
21 Largest difference between adjacent primes
21 Nimber arithmetic
21 Own digits power sum
21 Padovan n-step number sequences
21 Pancake numbers
21 Percolation/Site percolation
21 Practical numbers
21 Primes - allocate descendants to their ancestors
21 Primes which contain only one odd digit
21 Readline interface
21 Separate the house number from the street name
21 Special factorials
21 Special pythagorean triplet
21 Transportation problem
21 Word ladder
20 Air mass
20 Color quantization O
20 Euler's constant 0.5772...
20 Legendre prime counting function
20 Logistic curve fitting in epidemiology
20 Most frequent k chars distance
20 P-value correction
20 Percolation/Mean cluster density
20 Print itself
20 SQL-based authentication
20 Sierpinski square curve
20 Terminal control/Positional read
20 Word search
20 Wordle comparison
19 Bitmap/Read an image through a pipe
19 Brilliant numbers
19 Chernick's Carmichael numbers
19 Code segment unload O
19 Collect and sort square numbers in ascending order from three lists
19 Compare sorting algorithms' performance
19 Compiler/AST interpreter
19 Cyclops numbers
19 Determine sentence type
19 Find URI in text
19 HTTPS/Client-authenticated
19 Largest palindrome product
19 Largest product in a grid
19 Magic constant
19 Minimum primes
19 Permutations with some identical elements
19 Proof O O O O
19 SHA-256 Merkle tree
19 Self-hosting compiler
19 Simulated annealing
19 Square root by hand
19 Tarjan
18 Aspect oriented programming
18 Banker's algorithm
18 Bitmap/PPM conversion through a pipe
18 Deceptive numbers
18 Free polyominoes enumeration
18 Minimal steps down to 1
18 Modified random distribution
18 NYSIIS
18 Non-transitive dice
18 Numerical integration/Adaptive Simpson's method
18 Particle swarm optimization
18 Percolation/Bond percolation
18 Prime numbers p for which the sum of primes less than or equal to p is prime
18 Quoting constructs
18 Ramanujan's constant
18 Rendezvous O
18 Retrieve and search chat history
18 Safe and Sophie Germain primes
18 Safe mode
18 Smallest numbers
18 Sort primes from list to a list
18 Suffix tree
18 Sum of two adjacent numbers are primes
18 Two bullet roulette
18 VList
18 XML validation
17 Bioinformatics/Subsequence
17 Canny edge detector
17 Fortunate numbers
17 Four is the number of letters in the ...
17 Geometric algebra
17 Goldbach's comet
17 Longest palindromic substrings
17 Overloaded operators
17 Penrose tiling
17 Periodic table
17 Pseudorandom number generator image
17 Sorting algorithms/Tree sort on a linked list
17 Three word location
16 Curzon numbers
16 Distribution of 0 digits in factorial series
16 Interactive help
16 Long stairs
16 OpenWebNet password
16 Pandigital prime
16 Prime triangle
16 Rodrigues’ rotation formula
16 Run as a daemon or service
16 Text completion
16 Topological sort/Extracted top item
16 Tree from nesting levels
15 Achilles numbers
15 Camel case and snake case
15 Continued fraction/Arithmetic/G(matrix ng, continued fraction n)
15 Curve that touches three points
15 Earliest difference between prime gaps
15 Factorial base numbers indexing permutations of a collection
15 Functional coverage tree
15 Geohash
15 Gradient descent
15 Minkowski question-mark function
15 Multi-base primes
15 One-time pad
15 Pentomino tiling
15 Pisano period
15 Railway circuit
15 Ruth-Aaron numbers
15 Selectively replace multiple instances of a character within a string
15 Untouchable numbers
15 XXXX redacted
14 Anadromes
14 Audio frequency generator
14 Checksumcolor
14 Colorful numbers
14 Composite numbers k with no single digit factors whose factors are all substrings of k
14 Conjugate a Latin verb
14 Deconvolution/2D+
14 Display an outline as a nested table
14 Duffinian numbers
14 Equal prime and composite sums
14 Erdös-Selfridge categorization of primes
14 Generalised floating point addition
14 Greed
14 Hex words
14 Hourglass puzzle
14 Launch rocket with countdown and acceleration in stdout
14 Rhonda numbers
14 Set right-adjacent bits
14 Tetris
14 Tropical algebra overloading
14 Two's complement
14 Unit testing
14 Using a speech engine to highlight words
14 Verhoeff algorithm
13 Catmull–Clark subdivision surface
13 Colour pinstripe/Printer O
13 Count the coins/0-1
13 Euclid-Mullin sequence
13 Execute CopyPasta Language
13 Fibonacci matrix-exponentiation
13 Find Chess960 starting position identifier
13 Graph colouring
13 Iterators
13 Polynomial derivative
13 Powerful numbers
13 Spoof game
13 Time-based one-time password algorithm
13 War card game
12 Combinations with repetitions/Square digit chain
12 Distinct palindromes within decimal numbers
12 External sort
12 Faces from a mesh
12 French Republican calendar
12 Giuga numbers
12 Home primes
12 Mayan calendar
12 Morpion solitaire
12 Pinstripe/Printer
12 Range modifications
12 Repunit primes
12 Rosetta Code/Rank languages by number of users
12 Rosetta Code/Tasks without examples
12 Solve hanging lantern problem
12 Starting a web browser
12 Suffixation of decimal numbers
12 Terminal control/Restricted width positional input/No wrapping
12 Tree datastructures
12 Wordiff
11 Bioinformatics/Global alignment
11 Brace expansion using ranges
11 IPC via named pipe
11 Numerical and alphabetical suffixes
11 OpenGL/Utah teapot
11 Parse EBNF
11 Ramanujan primes
11 Resistance calculator
11 Round-robin tournament schedule
11 Simple turtle graphics
11 Square form factorization
11 Terminal control/Restricted width positional input/With wrapping
11 URL shortener
11 Ultra useful primes
10 16 puzzle game
10 ADFGVX cipher
10 Discrete Fourier transform
10 Elliptic Curve Digital Signature Algorithm
10 Execute Computer/Zero
10 Integer long division
10 Jaccard index
10 N-queens minimum and knights and bishops
10 Resistance network calculator
10 Robots
10 Solve equations with substitution method
10 Sort an outline at every level
10 Tamagotchi emulator
10 Text to HTML
10 User defined pipe and redirection operators
9 Arithmetic derivative
9 B-spline
9 Compiler/Verifying syntax
9 Continued fraction/Arithmetic/G(matrix ng, continued fraction n1, continued fraction n2)
9 Doubly-linked list/Element removal
9 Fibonacci heap
9 Multidimensional Newton-Raphson method
9 Numbers which are not the sum of distinct squares
9 OpenGL pixel shader
9 Pell numbers
9 Price list behind API
9 Ramanujan primes/twins
9 Rosetta Code/Run examples
9 Smallest enclosing circle problem
8 Addition-chain exponentiation
8 Audio overlap loop
8 Binary coded decimal
8 Dating agency
8 Hexapawn
8 Horse racing
8 Isograms and heterograms
8 Marching squares
8 P-Adic numbers, basic
8 Peripheral drift illusion
8 Random sentence from book
8 Raster bars
8 Recursive descent parser generator
8 Remote agent/Agent logic
8 Remote agent/Simulation
8 Search in paragraph's text
8 Segmentation fault protection
8 Strassen's algorithm
8 Waveform analysis/Doh ray me O O
8 WiktionaryDumps to words
7 Babylonian spiral
7 Bifid cipher
7 Black box
7 Boids
7 Chess player
7 Compiler/Simple file inclusion pre processor
7 I'm a software engineer, get me out of here
7 Latin Squares in reduced form/Randomizing using Jacobson and Matthews’ Technique
7 Process SMIL directives in XML data
7 Remote agent/Agent interface
7 Smallest number k such that k+2^m is composite for all m less than k
7 Worthwhile task shaving
6 Autogram checker
6 Boyer-Moore string search
6 Create your own text control codes
6 Divide a rectangle into a number of unequal triangles
6 Gotchas
6 Knuth-Morris-Pratt string search
6 OLE automation O O O
6 P-Adic square roots
6 Particle fountain
6 Red black tree sort
6 Solve a Rubik's cube
6 Transliterate English text using the Greek alphabet
6 Use a REST API
6 Wasteful, equidigital and frugal numbers
5 Anagram generator
5 Create an executable for a program in an interpreted language
5 Cycles of a permutation
5 Dominoes
5 Erdős–Woods numbers
5 Gaussian primes
5 Generalised floating point multiplication
5 Multiton
5 Number triplets game
5 Rosetta Code/List authors of task descriptions
5 Solving coin problems
5 Unicode polynomial equation O
5 Waveform analysis/Top and tail O
5 Weather routing
4 15 puzzle game in 3D
4 Blackjack strategy
4 CLI-based maze-game
4 Cross compilation
4 Diophantine linear system solving
4 IRC gateway O
4 Ukkonen’s suffix tree construction
4 Uno (card game)
4 Vidir
4 Wave function collapse
3 3d turtle graphics
3 Compiler/Preprocessor
3 Elevator simulation
3 Sanitize user input
3 WebGL rotating F