Rosetta Code/Count examples/Full list/Tier 3

From Rosetta Code

Third 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
Third ten programming languages by number of task examples completed:
    ㉑ Zkl           ㉒ Sidef         ㉓ Factor        ㉔ D             ㉕ Tcl          
    ㉖ Jq            ㉗ C_sharp       ㉘ Ada           ㉙ Scala         ㉚ Rust         
As of 2023-01-29T20:53:11Z :: Tasks: 1213 :: Draft Tasks:383 :: Total Tasks: 1596 :: Total Examples: 89469
Count Task
550 Hello world/Text
364 99 bottles of beer
357 FizzBuzz
341 100 doors
319 Fibonacci sequence
300 Comments
287 A+B
286 Factorial
283 Empty program
248 Loops/Infinite
240 Arrays
240 Reverse a string
238 Ackermann function
235 Function definition
233 Loops/For
224 Conditional structures
223 Loops/While
211 Array concatenation
211 Greatest element of a list
209 Arithmetic/Integer
200 Repeat a string
197 Greatest common divisor
197 Increment a numerical string
196 Integer comparison
194 Averages/Arithmetic mean
193 Sieve of Eratosthenes
192 Even or odd
191 Hello world/Graphical
190 Array length
188 Copy a string
187 Binary digits
187 String concatenation
185 Sum and product of an array
184 Boolean values
182 Loops/Downward for
180 Towers of Hanoi
179 Apply a callback to an array
179 Character codes
179 Generic swap
179 Hello world/Newline omission
178 Integer sequence
177 Rot-13
177 String length
176 Empty string
176 Tokenize a string
174 Loops/For with a specified step
174 Loops/N plus one half
173 Loops/Foreach
173 Palindrome detection
172 Quine
172 String case
170 Loops/Break
168 Sum of a series
167 Dot product
167 Logical operations
165 Loops/Do-while
164 Sum of squares
163 Hailstone sequence
161 Associative array/Creation
160 Filter
157 Remove duplicate elements
156 Sort an integer array
155 Execute a system command
154 Caesar cipher
154 Leap year
154 Loop over multiple arrays simultaneously
153 Sorting algorithms/Quicksort
153 System time
152 Luhn test of credit card numbers
151 Higher-order functions
150 Generate lower case ASCII alphabet
150 Primality by trial division
150 Stack
149 Determine if a string is numeric
149 Guess the number
148 Command-line arguments
148 Day of the week
148 Factors of an integer
148 Substring
148 User input/Text
148 Zero to the zero power
145 Read entire file
145 Sorting algorithms/Bubble sort
144 Bitwise operations
144 Check that file exists
144 Create a file
144 Hello world/Standard error
143 Loops/Continue
142 Least common multiple
142 Mutual recursion
140 ABC problem
140 Roman numerals/Encode
139 Balanced brackets
138 Literals/String
138 Sleep
138 Variables
137 File input/output
137 Happy numbers
136 Ethiopian multiplication
136 Pascal's triangle
136 Program termination
135 Count in octal
135 Date format
134 Flatten a list
133 Literals/Integer
132 Compound data type
132 Include a file
132 Mandelbrot set
132 Roman numerals/Decode
131 Function composition
131 Knuth shuffle
130 N-queens problem
129 Detect division by zero
129 Loops/Nested
129 String matching
128 Count occurrences of a substring
128 Null object
128 Real constants and functions
127 Associative array/Iteration
127 Guess the number/With feedback
127 Matrix transposition
127 Pick random element
127 Read a file line by line
126 Anagrams
126 Case-sensitivity of identifiers
126 Letter frequency
126 Return multiple values
126 Sorting algorithms/Insertion sort
125 Align columns
125 Averages/Root mean square
125 Strip a set of characters from a string
123 Binary search
123 Hash from two arrays
123 Matrix multiplication
122 Conway's Game of Life
122 Delete a file
122 Haversine formula
122 Identity matrix
122 Look-and-say sequence
121 Babbage problem
121 Catalan numbers
121 Environment variables
121 Input loop
121 Permutations
120 Assertions
120 Averages/Median
120 Classes
120 File size
120 Perfect numbers
120 String interpolation (included)
119 Call a function
119 Find limit of recursion
118 Sierpinski triangle
117 String append
117 Substring/Top and tail
116 HTTP
116 Harshad or Niven series
116 Pangram checker
116 Temperature conversion
115 Arithmetic/Complex
115 Infinity
115 Rename a file
115 Variadic function
114 Hostname
114 Multiplication tables
114 Search a list
113 Anonymous recursion
113 Arithmetic-geometric mean
113 Bulls and cows
113 Horner's rule for polynomial evaluation
113 Levenshtein distance
113 Reverse words in a string
112 Comma quibbling
112 Evaluate binomial coefficients
112 Formatted numeric output
112 N'th
112 Run-length encoding
112 Strip whitespace from a string/Top and tail
112 Sum multiples of 3 and 5
111 Accumulator factory
111 Ordered words
111 The Twelve Days of Christmas
110 Middle three digits
110 Program name
109 Averages/Pythagorean means
109 Create a two-dimensional array at runtime
109 String prepend
108 Digital root
108 Exceptions
108 Prime decomposition
108 Sorting algorithms/Merge sort
108 Vector products
108 Zig-zag matrix
107 Arbitrary-precision integers (included)
107 Queue/Definition
107 Random numbers
107 Sum digits of an integer
107 Trigonometric functions
106 Combinations
105 Enumerations
105 Regular expressions
105 Sequence of non-squares
105 Sorting algorithms/Selection sort
104 24 game
104 Amicable pairs
104 Calculating the value of e
104 Short-circuit evaluation
103 Power set
103 Shell one-liner
103 Walk a directory/Non-recursively
102 Abundant, deficient and perfect number classifications
102 Evolutionary algorithm
101 Collections
101 Execute Brain****
101 Range extraction
101 Sorting algorithms/Gnome sort
101 Y combinator O
100 Almost prime
100 Time a function
99 Create an HTML table
99 Hello world/Newbie
99 Range expansion
98 Interactive programming (repl) O O
98 MD5
98 One-dimensional cellular automata
98 Sort using a custom comparator
98 String comparison
98 Symmetric difference
97 Averages/Mode
97 Exponentiation operator
97 Hofstadter Q sequence
97 Map range
97 Nth root
97 Random number generator (included)
97 Show ASCII table
97 Sorting algorithms/Cocktail sort
96 First-class functions
96 Hamming numbers
96 Langton's ant
96 Sorting algorithms/Heapsort
95 Monty Hall problem
95 Number reversal game
94 Entropy
94 Inheritance/Single
94 Number names
94 Sierpinski carpet
94 Tree traversal
93 Address of a variable O O
93 Averages/Simple moving average
93 Catamorphism
93 Forward difference
93 Gray code
93 JSON
93 Josephus problem
93 Menu
93 Price fraction
93 Simple windowed application
93 Sorting algorithms/Bogosort
92 CSV data manipulation
92 Cumulative standard deviation
92 Last Friday of each month
92 Split a character string based on change of character
91 Abstract type O
91 Compare a list of strings
91 Repeat
91 Terminal control/Clear the screen
90 Five weekends
90 Greatest subsequential sum
90 URL decoding
89 Box the compass
89 Count in factors
89 Floyd's triangle
89 Literals/Floating point
89 Window creation
88 CSV to HTML translation
88 Munchausen numbers
88 Non-decimal radices/Convert
88 Set
88 Sort an array of composite structures
88 Walk a directory/Recursively
87 Find the last Sunday of each month
87 Hello world/Line printer
87 Here document
87 Proper divisors
87 Queue/Usage
86 Department numbers
86 Modular inverse
86 Operator precedence
86 Order two numerical lists
86 SEDOLs
86 Top rank per group
86 URL encoding
86 Word wrap
85 Bitmap
85 Extend your language O
85 Playing cards
85 Read a specific line from a file
85 Singly-linked list/Traversal
85 Sorting algorithms/Shell sort
85 Strip comments from a string
84 CRC-32
84 Closures/Value capture
84 Count the coins
84 File modification time
84 Find common directory path
84 Find the missing permutation
84 Jump anywhere
84 Multifactorial
84 Population count
84 Pythagorean triples
83 Anti-primes
83 Concurrent computing
83 Dragon curve
83 Introspection
83 Knapsack problem/0-1
83 Lucas-Lehmer test
83 Sockets
83 Spiral matrix
83 Terminal control/Ringing the terminal bell
82 Kaprekar numbers
82 Long multiplication
82 Pi
82 Show the epoch
82 Sorting algorithms/Counting sort
81 Anagrams/Deranged anagrams
81 Animation
81 Call a foreign-language function
81 Dynamic variable names O O O
81 Fibonacci n-step number sequences
81 Jensen's Device
81 Linear congruential generator
81 Man or boy test
81 Priority queue
81 Soundex
81 Web scraping
81 XML/Input
80 100 prisoners
80 15 puzzle game
80 Angle difference between two bearings
80 Call an object method
80 Empty directory
80 Gamma function
80 Keyboard input/Obtain a Y or N response
80 Magic squares of odd order
80 Monte Carlo methods
80 Rock-paper-scissors
80 Sorting algorithms/Comb sort
80 Special characters
80 Take notes on the command line
80 Zeckendorf number representation
79 Convert seconds to compound duration
79 Date manipulation
79 Equilibrium index
79 Guess the number/With feedback (player)
79 Hello world/Web server
79 Old lady swallowed a fly
79 Parsing/RPN calculator algorithm
79 Phrase reversals
79 SHA-1
79 Semordnilap
79 Singly-linked list/Element definition
79 Sudoku
79 Thue-Morse
79 Unicode variable names
79 Write entire file
78 Calendar
78 Execute HQ9+
78 List comprehensions
78 Sort disjoint sublist
77 Averages/Mean angle
77 Non-decimal radices/Output
77 Read a configuration file
77 Rep-string
77 Sequence of primes by trial division
77 Vigenère cipher
76 AKS test for primes
76 Benford's law
76 Combinations with repetitions
76 Currying
76 Draw a sphere
76 Enforced immutability
76 Euler's sum of powers conjecture
76 Flow-control structures
76 Jewels and stones
76 Pernicious numbers
76 Quaternion type
76 SHA-256
76 Write float arrays to a text file
75 Additive primes
75 Four bit adder
75 Fractal tree
75 Multiple distinct objects
75 Sort three variables
75 Unix/ls
74 Attractive numbers
74 Barnsley fern
74 Damm algorithm
74 Exceptions/Catch an exception thrown in a nested call
74 Largest int from concatenated ints
74 Roots of unity
74 Special variables
74 Stair-climbing puzzle
73 Bitmap/Bresenham's line algorithm
73 Constrained random points on a circle
73 General FizzBuzz
73 I before E except after C
73 Longest common subsequence
73 Maze generation
73 Van der Corput sequence
72 Arithmetic/Rational
72 Chinese remainder theorem
72 Exponentiation order
72 Fast Fourier transform
72 Horizontal sundial calculations
72 IBAN
72 Named parameters O O O
72 Nested function
72 Sorting algorithms/Stooge sort
72 Strip control codes and extended characters from a string
72 Yin and yang
71 Amb
71 Catalan numbers/Pascal's triangle
71 Closest-pair problem
71 Fork
71 Get system command output
71 Numerical integration
71 Polymorphism
71 Probabilistic choice
71 Runtime evaluation O O
71 Self-describing numbers
71 Sorting algorithms/Pancake sort
71 Square but not cube
71 Stern-Brocot sequence
71 Text processing/Max licenses in use
71 Trabb Pardo–Knuth algorithm
71 Variable size/Get
70 Gapful numbers
70 Host introspection
70 Morse code
70 Singly-linked list/Element insertion
70 Van Eck sequence
70 Word frequency
69 Abundant odd numbers
69 Binary strings
69 Euler method
69 Extract file extension
69 ISBN13 check digit
69 Memory allocation
69 Narcissistic decimal number
69 One of n lines in a file
69 RPG attributes generator
69 Semiprime
69 Write language name in 3D ASCII
68 4-rings or 4-squares puzzle
68 Best shuffle
68 Circles of given radius through two points
68 Continued fraction
68 Determine if a string is collapsible
68 Isqrt (integer square root) of X
68 Nim game
68 Remove lines from a file
68 Roots of a function
68 Sort stability
68 Sorting algorithms/Sleep sort
68 XML/Output
67 9 billion names of God the integer
67 Animate a pendulum
67 CUSIP
67 Documentation
67 Factors of a Mersenne number
67 Integer overflow
67 McNuggets problem
67 Modular exponentiation
67 Mouse position
67 Optional parameters
67 Plot coordinate pairs
67 Reduced row echelon form
67 Two sum
67 Undefined values
66 Cartesian product of two or more lists
66 Cholesky decomposition
66 Compile-time calculation
66 Dutch national flag problem
66 HTTPS
66 Hofstadter-Conway $10,000 sequence
66 Inheritance/Multiple
66 Leonardo numbers
66 Magic 8-ball
66 Runge-Kutta method
66 Subleq
66 Terminal control/Display an extended character
65 Determine if a string has all the same characters
65 Draw a clock
65 Draw a pixel
65 Globally replace text in several files
65 Knight's tour
65 Non-decimal radices/Input
65 Roots of a quadratic function
65 Test a function
65 Tic-tac-toe
64 Averages/Mean time of day
64 Base64 decode data
64 Bitmap/Write a PPM file
64 Chinese zodiac
64 Knapsack problem/Continuous
64 Long year
64 Longest common prefix
64 Ludic numbers
64 Miller–Rabin primality test
64 Quickselect algorithm
64 Smith numbers
64 Two identical strings
63 2048
63 24 game/Solve
63 Arithmetic evaluation
63 Base64 encode data
63 Copy stdin to stdout
63 DNS query
63 Draw a cuboid
63 Emirp primes
63 Generator/Exponential
63 Huffman coding
63 JortSort
63 Partial function application
63 Remove vowels from a string
63 Unicode strings
62 Knapsack problem/Unbounded
62 Mad Libs
62 Pascal matrix generation
62 Ternary logic
62 Truncatable primes
61 Add a variable to a class instance at runtime O O
61 Brownian tree
61 Cantor set
61 Define a primitive data type
61 Dijkstra's algorithm
61 Kernighans large earthquake problem
61 Sattolo cycle
61 Scope modifiers
61 Sorting algorithms/Bead sort
61 Tau function
61 Topological sort
61 Truncate a file
61 User input/Graphical
61 Vector
60 Disarium numbers
60 FASTA format
60 Fibonacci word
60 Grayscale image
60 LZW compression
60 Left factorials
60 Matrix-exponentiation operator
60 Pointers and references
60 Random number generator (device)
60 Singleton
60 Stem-and-leaf plot
60 Terminal control/Coloured text
59 Call a function in a shared library
59 Deal cards for FreeCell
59 Discordian date
59 Doubly-linked list/Element definition
59 Farey sequence
59 Fusc sequence
59 Hash join
59 Keyboard input/Keypress check
59 Multisplit
59 Odd word problem
59 Tokenize a string with escaping
59 Unbias a random generator
59 Universal Turing machine
58 Associative array/Merging
58 Bernoulli numbers
58 Convert decimal number to rational
58 Delegates
58 Dinesman's multiple-dwelling problem
58 Forest fire
58 Iterated digits squaring
58 Longest common substring
58 Loops/Increment loop index within loop body
58 Maximum triangle path sum
58 Perfect shuffle
58 Sorting algorithms/Permutation sort
58 Words containing "the" substring
57 Abbreviations, automatic
57 Chaos game
57 Handle a signal
57 Inverted syntax O
57 Largest proper divisor of n
57 Loops/With multiple ranges
57 Primality by Wilson's theorem
57 Rosetta Code/Rank languages by popularity
57 Runtime evaluation/In an environment O O
57 Sum of first n cubes
56 Archimedean spiral
56 Determine if a string has all unique characters
56 Extreme floating point values
56 First-class functions/Use numbers analogously
56 Modulinos O
56 Naming conventions
56 Password generator
56 Perfect totient numbers
56 Pig the dice game
56 Sort numbers lexicographically
56 Stack traces
56 Statistics/Basic
56 Sum of divisors
56 Validate International Securities Identification Number
56 XML/XPath
55 Bell numbers
55 Days between dates
55 Find the intersection of two lines
55 Greyscale bars/Display
55 Holidays related to Easter
55 Non-continuous subsequences
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 Strip block comments
55 Synchronous concurrency
55 Tau number
55 Terminal control/Cursor positioning
55 Water collected between towers
55 XML/DOM serialization
54 Egyptian division
54 Extensible prime generator
54 Kronecker product
54 Longest increasing subsequence
54 Move-to-front algorithm
54 Polynomial regression
54 Rate counter
54 Recaman's sequence
54 Text processing/2
54 Wireworld
53 Average loop length
53 Determine if a string is squeezable
53 Dining philosophers
53 Doubly-linked list/Element insertion
53 Fractran
53 Gaussian elimination
53 Heronian triangles
53 Hofstadter Figure-Figure sequences
53 Jaro similarity
53 Longest string challenge
53 Make directory path
53 Sierpinski triangle/Graphical
53 Strange plus numbers
53 Zebra puzzle
52 Bioinformatics/base count
52 Convex hull
52 Determinant and permanent
52 Doubly-linked list/Traversal
52 Execute a Markov algorithm
52 GUI component interaction
52 Metaprogramming O
52 Text processing/1
52 Totient function
51 Aliquot sequence classifications
51 Append a record to the end of a text file
51 Generate Chess960 starting position
51 Halt and catch fire
51 Musical scale
51 Respond to an unknown method call O O
51 Stable marriage problem
51 Taxicab numbers
51 Text between
50 ABC words
50 Bitmap/Flood fill
50 Colour bars/Display
50 Digital root/Multiplicative digital root
50 Echo server
50 Elementary cellular automaton
50 Floyd-Warshall algorithm
50 Last letter-first letter
50 Mertens function
50 Munching squares
50 Polymorphic copy
50 Sparkline in unicode
50 The Name Game
50 Visualize a tree
49 21 game
49 Abbreviations, easy
49 Chowla numbers
49 Colour pinstripe/Display
49 Doubly-linked list/Definition
49 Element-wise operations
49 Hilbert curve
49 History variables
49 Image noise
49 MAC vendor lookup
49 Numbers divisible by their individual digits, but not by the product of their digits.
49 OpenGL
49 Polynomial long division
49 Send an unknown method call O O
49 Smallest square that begins with n
49 Sorting algorithms/Radix sort
49 Spinning rod animation/Text
49 UTF-8 encode and decode
49 Ulam spiral (for primes)
49 Verify distribution uniformity/Naive
48 Active object
48 Approximate equality
48 Determine if only one instance is running
48 GUI/Maximum window dimensions
48 Set consolidation
48 Start from a main routine O O O
48 Substitution cipher
48 Sum of the digits of n is substring of n
48 Variable size/Set
47 Bitmap/Midpoint circle algorithm
47 Bitmap/Read a PPM file
47 Casting out nines
47 Color of a screen pixel
47 Compare length of two strings
47 Currency
47 Deepcopy
47 Knapsack problem/Bounded
47 Narcissist
47 Permutations/Derangements
47 Problem of Apollonius
47 Speech synthesis O
47 Sum to 100
47 Terminal control/Dimensions
47 Twelve statements
46 Abbreviations, simple
46 Base 16 numbers needing a to f
46 Bulls and cows/Player
46 Compiler/lexical analyzer
46 Find words which contains more than 3 e vowels
46 Fivenum
46 Flipping bits game
46 Keyboard input/Flush the keyboard buffer
46 Loops/Wrong ranges
46 Parsing/Shunting-yard algorithm
46 Permutations by swapping
46 Rosetta Code/Count examples
46 Sorting Algorithms/Circle Sort
46 Subtractive generator
46 Sutherland-Hodgman polygon clipping
46 Truth table
45 Atomic updates
45 Brazilian numbers
45 Carmichael 3 strong pseudoprimes
45 Code Golf: Code Golf
45 Coprimes
45 Display a linear combination
45 File extension is in extensions list
45 MD5/Implementation
45 Read a file character by character/UTF8
45 S-expressions
45 Sailors, coconuts and a monkey problem
45 Secure temporary file
45 Shift list elements to left by 3
45 Sort a list of object identifiers
45 Sorting algorithms/Patience sort
45 Strange numbers
45 Type detection
45 Yellowstone sequence
44 Balanced ternary
44 Brace expansion
44 Count how many vowels and consonants occur in a string
44 Cramer's rule
44 Cycle detection
44 Euler's identity
44 Hickerson series of almost integers
44 Humble numbers
44 Idiomatically determine all the lowercase and uppercase letters
44 Input/Output for pairs of numbers
44 Julia set
44 Lah numbers
44 Largest number divisible by its digits
44 Long primes
44 Palindrome dates
44 Pascal's triangle/Puzzle
44 Percentage difference between images
44 Primorial numbers
44 Ranking methods
44 Special divisors
44 Summarize and say sequence
44 Voronoi diagram
43 Calendar - for "REAL" programmers O O
43 Combinations and permutations
43 Digit fifth powers
43 Feigenbaum constant calculation
43 Find words which contains all the vowels
43 Four is magic
43 GUI enabling/disabling of controls
43 Input/Output for lines of text
43 Inverted index
43 Matrix with two diagonals
43 Nice primes
43 Prime conspiracy
43 Product of divisors
43 Pythagorean quadruples
43 Safe primes and unsafe primes
43 Sequence: smallest number with exactly n divisors
43 Table creation/Postal addresses
43 Terminal control/Inverse video
42 Cheryl's birthday
42 Factorions
42 Find the intersection of a line with a plane
42 Function prototype O
42 Kahan summation
42 Knuth's algorithm S
42 Magic squares of doubly even order
42 Parallel calculations
42 Penney's game
42 Permutations with repetitions
42 Scope/Function names and labels
42 Statistics/Normal distribution
42 Topswops
42 Triplet of three numbers
42 Unique characters
42 Variable-length quantity
41 Bitwise IO
41 Create a file on magnetic tape O O
41 Extra primes
41 Fibonacci word/fractal
41 Find prime numbers of the form n*n*n+2
41 Integer roots
41 Maze solving
41 Metered concurrency
41 Parametric polymorphism O O O
41 Permutation test
41 Primes whose sum of digits is 25
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 Arithmetic-geometric mean/Calculate Pi
40 Break OO privacy O
40 Cousin primes
40 Cuban primes
40 Dice game probabilities
40 Find palindromic numbers in both binary and ternary bases
40 Find words whose first and last three letters are equal
40 Frobenius numbers
40 Implicit type conversion
40 Koch curve
40 LU decomposition
40 Lychrel numbers
40 Multiple regression
40 Odd and square numbers
40 Parsing/RPN to infix conversion
40 Pathological floating point problems
40 Pentagram
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 Alternade words
39 Apply a digital filter (direct form II transposed)
39 Check output device is a terminal
39 Church numerals
39 Constrained genericity O O
39 Draw a rotating cube
39 Events
39 Find prime n such that reversed n is also prime
39 Find words with alternating vowels and consonants
39 Longest common suffix
39 Mersenne primes
39 Metronome
39 Minesweeper game
39 Multi-dimensional array
39 Mutex O
39 Numbers with prime digits whose sum is 13
39 Old Russian measure of length
39 Order disjoint list items
39 Pinstripe/Display
39 Pseudo-random numbers/Middle-square method
39 Sort the letters of string in alphabetical order
39 Terminal control/Unicode output
38 10001th prime
38 Algebraic data types O
38 Bitmap/Bézier curves/Cubic
38 Change e letters to i in words
38 Conjugate transpose
38 Continued fraction/Arithmetic/Construct from rational number
38 Create an object at a given address O
38 Determine if two triangles overlap
38 Eban numbers
38 Entropy/Narcissist
38 Find square difference
38 Length of an arc between two angles
38 Machine code
38 Minimum number of cells after, before, above and below NxN squares
38 Multiline shebang
38 Numerical integration/Gauss-Legendre Quadrature
38 Object serialization
38 RSA code
38 Square-free integers
38 Strong and weak primes
38 Subset sum problem
38 Sudan function
38 Sum of elements below main diagonal of matrix
38 Zumkeller numbers
37 AVL tree
37 Ascending primes
37 Bacon cipher
37 Chaocipher
37 Circular primes
37 Diversity prediction theorem
37 Gauss-Jordan matrix inversion
37 MD4
37 Negative base numbers
37 Numbers which binary and ternary digit sum are prime
37 Ordered partitions
37 Pell's equation
37 Polyspiral
37 RIPEMD-160
37 Smarandache prime-digital sequence
37 Successive prime differences
37 Superellipse
37 Word wheel
36 Egyptian fractions
36 Faulhaber's triangle
36 First power of 2 that has leading decimal digits of 12
36 Galton box animation
36 Modular arithmetic
36 Numbers with equal rises and falls
36 Parameterized SQL statement O
36 Partition function P
36 Perlin noise
36 Poker hand analyser
36 Show the (decimal) value of a number of 1s appended with a 3, then squared
36 Terminal control/Preserve screen
36 Textonyms
36 Twin primes
36 URL parser
35 Angles (geometric), normalization and conversion
35 Bitmap/Bézier curves/Quadratic
35 Check input device is a terminal
35 Color wheel
35 Death Star
35 Decimal floating point number to binary
35 FTP
35 Find first and last set bit of a long integer
35 Minimum positive multiple in base 10 using only 0 and 1
35 Möbius function
35 Numbers in base-16 representation that cannot be written with decimal digits
35 Numbers with same digit set in base 10 and base 16
35 Partition an integer x into n primes
35 Peano curve
35 Reflection/List properties O
35 Rosetta Code/Find unimplemented tasks
35 Set puzzle
35 Sexy primes
35 Solve a Hidato puzzle
35 Sorting algorithms/Cycle sort
35 Topic variable O O O
35 Use another language to call a function
35 Zhang-Suen thinning algorithm
34 Bitmap/Histogram
34 Burrows–Wheeler transform
34 Calkin-Wilf sequence
34 Canonicalize CIDR
34 Chebyshev coefficients
34 Chemical calculator
34 Decision tables
34 Esthetic numbers
34 Executable library
34 Find first missing positive
34 Find if a point is within a triangle
34 Jacobi symbol
34 Law of cosines - triples
34 Mian-Chowla sequence
34 Multiplicative order
34 Parallel brute force
34 Parse command-line arguments
34 Positive decimal integers with the digit 1 occurring exactly twice
34 Simple database
34 Steady squares
34 Straddling checkerboard
34 Strange unique prime triplets
34 Terminal control/Cursor movement
34 Unprimeable numbers
34 Weird numbers
34 Wieferich primes
34 Word break problem
34 Write to Windows event log
34 Xiaolin Wu's line algorithm
33 Abelian sandpile model
33 Bin given limits
33 Bitcoin/address validation
33 Chat server
33 Checkpoint synchronization
33 Common list elements
33 Doomsday rule
33 Fairshare between two and more
33 Find words which contain the most consonants
33 First 9 prime Fibonacci number
33 Long literals, with continuations
33 Mayan numerals
33 Pierpont primes
33 Pragmatic directives
33 Primes with digits in nondecreasing order
33 Random Latin squares
33 Range consolidation
33 Resistor mesh
33 Set of real numbers
33 Summarize primes
33 Super-d numbers
33 Unique characters in each string
33 Verify distribution uniformity/Chi-squared test
33 Words from neighbour ones
32 Common sorted list
32 Deconvolution/1D
32 Distinct power numbers
32 Execute SNUSP
32 Faulhaber's formula
32 Finite state machine
32 Generate random chess position
32 Generate random numbers without repeating a value
32 Go Fish
32 HTTPS/Authenticated
32 Keyboard macros
32 Memory layout of a data structure
32 Minimum numbers of three lists
32 Nonoblock
32 Numeric error propagation
32 Rosetta Code/Fix code tags
32 Stirling numbers of the second kind
32 Sum and product puzzle
32 Video display modes O O
32 Window creation/X11
31 A* search algorithm
31 Arena storage pool
31 Bioinformatics/Sequence mutation
31 Check Machin-like formulas
31 Compiler/virtual machine interpreter
31 Day of the week of Christmas and New Year
31 Exactly three adjacent 3 in lists
31 First class environments O
31 Hunt the Wumpus
31 Increasing gaps between consecutive Niven numbers
31 Largest prime factor
31 Magnanimous numbers
31 Maximum difference between adjacent elements of list
31 Plasma effect
31 Product of min and max prime factors
31 Ramsey's theorem
31 State name puzzle
31 Stirling numbers of the first kind
31 Stream merge
31 Sylvester's sequence
31 The ISAAC cipher
31 Update a configuration file
30 Birthday problem
30 De Bruijn sequences
30 Fermat numbers
30 Find minimum number of coins that make a given value
30 Formal power series
30 Harmonic series
30 Honeycombs
30 Jacobsthal numbers
30 Kronecker product based fractals
30 Monads/Maybe monad
30 Motzkin numbers
30 N-smooth numbers
30 Natural sorting
30 Neighbour primes
30 Numbers in base 10 that are palindromic in bases 2, 4, and 16
30 Reflection/List methods O
30 Reverse the order of lines in a text file while preserving the contents of each line
30 Sierpinski pentagon
30 Sorting algorithms/Cocktail sort with shifting bounds
30 Table creation
30 Teacup rim text
29 Active Directory/Connect
29 Append numbers at same position in strings
29 Arithmetic numbers
29 Audio alarm
29 Biorhythms
29 Cut a rectangle
29 Find largest left truncatable prime in a given base
29 First perfect square in base n with n unique digits
29 Fixed length records
29 Fraction reduction
29 Largest five adjacent number
29 Merge and aggregate datasets
29 Minimum multiple of m where digital sum equals m
29 Mosaic matrix
29 Next highest int from digits
29 Odd words
29 Play recorded sounds
29 Prime numbers which contain 123
29 Pseudo-random numbers/PCG32
29 Safe addition
29 Same fringe
29 Shortest common supersequence
29 Sleeping Beauty problem
29 Snake and ladder
29 Solve a Holy Knight's tour
29 Sunflower fractal
29 Superpermutation minimisation
29 Thiele's interpolation formula
29 Tonelli-Shanks algorithm
29 World Cup group stage
28 Almkvist-Giullera formula for pi
28 Card shuffles
28 Changeable words
28 Cipolla's algorithm
28 Cistercian numerals
28 Coprime triplets
28 Distributed programming
28 Find squares n where n+1 is prime
28 Idiomatically determine all the characters that can be used for symbols
28 Image convolution
28 Intersecting number wheels
28 Last list item
28 Legendre prime counting function
28 Monads/List monad
28 Nautical bell
28 Numeric separator syntax
28 Order by pair comparisons
28 Palindromic gapful numbers
28 Paraffins
28 Piprimes
28 Playfair cipher
28 Sequence of primorial primes
28 Sierpinski arrowhead curve
28 Summation of primes
28 Total circles area
28 UPC
28 Welch's t-test
28 Yahoo! search interface
27 Base58Check encoding
27 Descending primes
27 Elliptic curve arithmetic
27 Erdős-primes
27 Exponentiation with infix operators in (or operating on) the base
27 Find adjacent primes which differ by a square integer
27 Four sides of square
27 Function frequency
27 Kolakoski sequence
27 Linux CPU utilization
27 Make a backup file
27 Matrix chain multiplication
27 Mind boggling card trick
27 Odd squarefree semiprimes
27 Parse an IP Address
27 Percolation/Mean run density
27 Permutations/Rank of a permutation
27 Prime words
27 RCRPG
27 Ramer-Douglas-Peucker line simplification
27 Self numbers
27 Simulate input/Keyboard O
27 Snake
27 Sum of primes in odd positions is prime
27 Sum of square and cube digits of an integer are primes
26 15 puzzle solver
26 Commatizing numbers
26 Consecutive primes with ascending or descending differences
26 Deceptive numbers
26 Deming's funnel
26 Hough transform
26 K-means++ clustering
26 Kosaraju
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 Permuted multiples
26 Prime triplets
26 Quadrat special primes
26 Rare numbers
26 Reverse the gender of a string
26 Smallest multiple
26 Special neighbor primes
26 Spelling of ordinal numbers
26 Ulam numbers
25 ASCII art diagram converter
25 Abelian sandpile model/Identity
25 Assertions in design by contract
25 Compiler/code generator
25 Create an object/Native demonstration
25 EKG sequence convergence
25 Elementary cellular automaton/Random number generator
25 File size distribution
25 Index finite lists of positive integers
25 Joystick position O O
25 Mastermind
25 Next special primes
25 Numbers whose count of divisors is prime
25 Palindromic primes in base 16
25 Pseudo-random numbers/Xorshift star
25 Record sound O
25 Reflection/Get source O
25 SOAP
25 Sine wave
25 Smallest power of 6 whose decimal expansion contains n
25 Solve a Hopido puzzle
25 Solve a Numbrix puzzle
25 Sum data type
25 Zeckendorf arithmetic
24 Active Directory/Search for a user
24 Addition chains
24 Bilinear interpolation
24 Compiler/syntax analyzer
24 Concatenate two primes is also prime
24 Curzon numbers
24 Euler's constant 0.5772...
24 Find duplicate files
24 Levenshtein distance/Alignment
24 Longest substrings without repeating characters
24 Main step of GOST 28147-89
24 Native shebang
24 Perceptron
24 Print debugging statement
24 Pseudo-random numbers/Splitmix64
24 Sequence: nth number with exactly n divisors
24 Sokoban
24 Solve triangle solitare puzzle
24 Sum of two adjacent numbers are primes
24 The sieve of Sundaram
24 Untrusted environment
24 Vigenère cipher/Cryptanalysis
23 Cubic special primes
23 Cyclops numbers
23 Knuth's power tree
23 Latin Squares in reduced form
23 Line circle intersection
23 Median filter
23 Metallic ratios
23 N-body problem
23 Names to numbers
23 Nested templated data
23 Nonogram solver
23 Permutations with some identical elements
23 Pig the dice game/Player
23 Polynomial synthetic division
23 Selectively replace multiple instances of a character within a string
23 Sierpinski curve
23 Singly-linked list/Element removal
23 Substring primes
23 Useless instructions
23 Variable declaration reset
23 Vibrating rectangles
23 Vogel's approximation method
23 Wilson primes of order n
22 Bitcoin/public point to address
22 Collect and sort square numbers in ascending order from three lists
22 Cullen and Woodall numbers
22 Data Encryption Standard
22 Draw pixel 2
22 Eertree
22 Elementary cellular automaton/Infinite length
22 Getting the number of decimals
22 Matrix digital rain
22 Monads/Writer monad
22 Montgomery reduction
22 Peaceful chess queen armies
22 Primes whose first and last number is 3
22 Print itself O
22 Pseudo-random numbers/Combined recursive generator MRG32k3a
22 Selective file copy
22 Simulate input/Mouse O
22 Soloway's recurring rainfall
22 Special factorials
22 Window management
21 Air mass
21 Arithmetic coding/As a generalized change of radix
21 Brilliant numbers
21 Colorful numbers
21 Cyclotomic polynomial
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 Largest product in a grid
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 Quoting constructs
21 Readline interface
21 Separate the house number from the street name
21 Smallest numbers
21 Special pythagorean triplet
21 Transportation problem
21 Word ladder
20 Anadromes
20 Color quantization
20 Compare sorting algorithms' performance
20 Compiler/AST interpreter
20 HTTPS/Client-authenticated
20 Logistic curve fitting in epidemiology
20 Magic constant
20 Most frequent k chars distance
20 P-value correction
20 Percolation/Mean cluster density
20 Riordan numbers
20 SQL-based authentication
20 Safe and Sophie Germain primes
20 Self-hosting compiler
20 Sierpinski square curve
20 Sort primes from list to a list
20 Terminal control/Positional read O
20 Two's complement
20 Word search
20 Wordle comparison
19 Aspect oriented programming
19 Bitmap/Read an image through a pipe
19 Chernick's Carmichael numbers
19 Code segment unload
19 Determine sentence type
19 Find URI in text
19 Goldbach's comet
19 Idoneal numbers
19 Largest palindrome product
19 Long stairs
19 Minimum primes
19 Numbers which are the cube roots of the product of their proper divisors
19 Periodic table
19 Proof O
19 SHA-256 Merkle tree
19 Simulated annealing
19 Square root by hand
19 Tarjan
19 Two bullet roulette
19 XML validation
18 Banker's algorithm
18 Bitmap/PPM conversion through a pipe
18 Conjugate a Latin verb
18 Free polyominoes enumeration
18 Gradient descent
18 Honaker primes
18 Longest palindromic substrings
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 Penrose tiling
18 Percolation/Bond percolation
18 Prime numbers p for which the sum of primes less than or equal to p is prime
18 Ramanujan's constant
18 Rendezvous
18 Retrieve and search chat history
18 Safe mode
18 Suffix tree
18 VList O
17 Achilles numbers
17 Bioinformatics/Subsequence
17 Canny edge detector
17 Fortunate numbers
17 Four is the number of letters in the ...
17 Geometric algebra
17 Giuga numbers
17 Overloaded operators
17 Pandigital prime
17 Pseudorandom number generator image
17 Sorting algorithms/Tree sort on a linked list
17 Three word location
17 Topological sort/Extracted top item
16 Binary coded decimal
16 Camel case and snake case
16 De Polignac numbers
16 Distribution of 0 digits in factorial series
16 Hex words
16 Interactive help
16 Klarner-Rado sequence
16 OpenWebNet password
16 Pentomino tiling
16 Pisano period
16 Polynomial derivative
16 Prime triangle
16 Railway circuit
16 Rodrigues’ rotation formula
16 Run as a daemon or service
16 Text completion
16 Tree from nesting levels
15 Composite numbers k with no single digit factors whose factors are all substrings of k
15 Continued fraction/Arithmetic/G(matrix ng, continued fraction n)
15 Count the coins/0-1
15 Curve that touches three points
15 Duffinian numbers
15 Earliest difference between prime gaps
15 Factorial base numbers indexing permutations of a collection
15 Functional coverage tree
15 Geohash
15 Gotchas
15 Inconsummate numbers in base 10
15 Minkowski question-mark function
15 Multi-base primes
15 One-time pad
15 Rhonda numbers
15 Ruth-Aaron numbers
15 Sphenic numbers
15 Tetris
15 Unit testing
15 Untouchable numbers
15 XXXX redacted
14 Audio frequency generator O
14 Checksumcolor
14 Colour pinstripe/Printer O
14 Deconvolution/2D+
14 Display an outline as a nested table
14 Equal prime and composite sums
14 Erdös-Selfridge categorization of primes
14 Euclid-Mullin sequence
14 Even numbers which cannot be expressed as the sum of two twin primes
14 Factorial primes
14 Find Chess960 starting position identifier
14 Generalised floating point addition
14 Greed
14 Hourglass puzzle
14 Launch rocket with countdown and acceleration in stdout
14 Meissel–Mertens constant
14 Powerful numbers
14 Set right-adjacent bits
14 Solve hanging lantern problem
14 Tropical algebra overloading
14 Using a speech engine to highlight words
14 Verhoeff algorithm
14 War card game
13 Arithmetic derivative
13 Catmull–Clark subdivision surface
13 Execute CopyPasta Language
13 Faces from a mesh
13 Fibonacci matrix-exponentiation
13 Gaussian primes
13 Graph colouring
13 Home primes
13 Iterators
13 Mayan calendar
13 Round-robin tournament schedule
13 Spoof game
13 Time-based one-time password algorithm
13 Wagstaff primes
13 Wordiff
12 16 puzzle game
12 ADFGVX cipher
12 Combinations with repetitions/Square digit chain
12 Distance and Bearing
12 Distinct palindromes within decimal numbers
12 External sort
12 French Republican calendar
12 Isograms and heterograms
12 Jaccard index
12 Morpion solitaire
12 Pinstripe/Printer O
12 Ramanujan primes
12 Range modifications
12 Repunit primes
12 Rosetta Code/Rank languages by number of users
12 Rosetta Code/Tasks without examples
12 Square form factorization
12 Starting a web browser
12 Suffixation of decimal numbers
12 Terminal control/Restricted width positional input/No wrapping
12 Tree datastructures
11 Bioinformatics/Global alignment
11 Brace expansion using ranges
11 Countdown
11 Discrete Fourier transform
11 Execute Computer/Zero
11 IPC via named pipe
11 Numerical and alphabetical suffixes
11 OpenGL/Utah teapot
11 Pan base non-primes
11 Parse EBNF
11 Pell numbers
11 Primes: n*2^m+1
11 Resistance calculator
11 Search in paragraph's text
11 Simple turtle graphics
11 Sort an outline at every level
11 Terminal control/Restricted width positional input/With wrapping
11 URL shortener
11 Ultra useful primes
10 Addition-chain exponentiation
10 Boyer-Moore string search
10 Compiler/Verifying syntax
10 Elliptic Curve Digital Signature Algorithm
10 Erdős-Nicolas numbers
10 Integer long division
10 Knuth-Morris-Pratt string search
10 N-queens minimum and knights and bishops
10 Numbers which are not the sum of distinct squares
10 O'Halloran numbers
10 Resistance network calculator
10 Robots
10 Sieve of Pritchard
10 Solve equations with substitution method
10 Super-Poulet numbers
10 Tamagotchi emulator
10 Text to HTML
10 User defined pipe and redirection operators
10 Zsigmondy numbers
9 B-spline
9 Black box
9 Continued fraction/Arithmetic/G(matrix ng, continued fraction n1, continued fraction n2)
9 Doubly-linked list/Element removal
9 Fermat pseudoprimes
9 Fibonacci heap
9 Marching squares
9 Multidimensional Newton-Raphson method
9 OpenGL pixel shader
9 Price list behind API
9 Ramanujan primes/twins
9 Random sentence from book
9 Rosetta Code/Run examples
9 Singular value decomposition
9 Smallest enclosing circle problem
9 Sub-unit squares
8 Audio overlap loop
8 Babylonian spiral
8 Dating agency
8 Hexapawn
8 Horse racing
8 I'm a software engineer, get me out of here
8 P-Adic numbers, basic
8 Pairs with common factors
8 Penta-power prime seeds
8 Peripheral drift illusion
8 Quad-power prime seeds
8 Raster bars
8 Recursive descent parser generator
8 Remote agent/Agent logic
8 Remote agent/Simulation
8 Segmentation fault protection
8 Strassen's algorithm
8 Wasteful, equidigital and frugal numbers
8 Waveform analysis/Doh ray me O
8 WiktionaryDumps to words
7 Bifid cipher
7 Boids
7 Boustrophedon transform
7 Chess player
7 Compiler/Simple file inclusion pre processor
7 Engel expansion
7 Factor-perfect numbers
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 Sorensen–Dice coefficient
7 Statistics/Chi-squared distribution
7 Transliterate English text using the Greek alphabet
7 Worthwhile task shaving
6 Anagram generator
6 Autogram checker
6 Convert CSV records to TSV
6 Create an executable for a program in an interpreted language
6 Create your own text control codes
6 Divide a rectangle into a number of unequal triangles
6 Dominoes
6 OLE automation O O
6 P-Adic square roots
6 Particle fountain
6 Red black tree sort
6 Rosetta Code/List authors of task descriptions
6 Selection bias in clinical sciences
6 Solve a Rubik's cube
6 Use a REST API
6 Wave function collapse
5 Cycles of a permutation
5 Erdős–Woods numbers
5 Generalised floating point multiplication
5 Multiton
5 Number triplets game
5 Solving coin problems
5 Unicode polynomial equation
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 Compiler/Preprocessor
4 Cross compilation
4 Diophantine linear system solving
4 IRC gateway
4 Inner classes
4 Protecting Memory Secrets
4 Sanitize user input
4 Ukkonen’s suffix tree construction
4 Uno (card game)
4 Vidir
4 WebGL rotating F
3 3d turtle graphics
3 Elevator simulation
1 Ormiston pairs