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 Sidef         ㉒ 11l           ㉓ Zkl           ㉔ Factor        ㉕ ALGOL_68     
    ㉖ D             ㉗ C_sharp       ㉘ Tcl           ㉙ Scala         ㉚ Delphi       
As of 2024-03-25T00:38:57Z :: Tasks: 1269 :: Draft Tasks:403 :: Total Tasks: 1672 :: Total Examples: 95661
Count Task
590 Hello world/Text
383 FizzBuzz
380 99 bottles of beer
355 100 doors
308 Fibonacci sequence
307 Comments
307 Factorial
298 A+B
290 Empty program
263 Loops/Infinite
249 Reverse a string
246 Ackermann function
246 Arrays
245 Function definition
239 Loops/For
232 Loops/While
231 Conditional structures
223 Array concatenation
217 Arithmetic/Integer
213 Greatest element of a list
206 Greatest common divisor
205 Even or odd
204 Increment a numerical string
204 Repeat a string
204 Sieve of Eratosthenes
201 Array length
197 Averages/Arithmetic mean
197 Hello world/Graphical
196 Binary digits
193 Copy a string
193 Towers of Hanoi
192 String concatenation
190 Loops/Downward for
190 Sum and product of an array
189 Boolean values
188 Integer comparison
188 Rot-13
187 Hello world/Newline omission
186 Apply a callback to an array
185 Character codes
185 Integer sequence
185 Loops/For with a specified step
184 Palindrome detection
181 String length
180 String case
180 Tokenize a string
179 Loops/Foreach
179 Sum of a series
178 Empty string
178 Loops/Break
175 Quine
174 Sum of squares
173 Dot product
173 Logical operations
172 Filter
172 Hailstone sequence
169 Loops/Do-while
163 Generic swap
163 Loops/N plus one half
163 Sorting algorithms/Quicksort
162 Associative array/Creation
161 Leap year
160 Caesar cipher
159 Sort an integer array
158 Luhn test of credit card numbers
156 Command-line arguments
156 Determine if a string is numeric
156 Generate lower case ASCII alphabet
155 Execute a system command
155 Stack
155 System time
155 User input/Text
154 Higher-order functions
153 ABC problem
153 Factors of an integer
153 Loops/Continue
153 Zero to the zero power
152 Hello world/Standard error
150 Bitwise operations
150 Loop over multiple arrays simultaneously
150 Mutual recursion
150 Sorting algorithms/Bubble sort
149 Guess the number
149 Primality by trial division
148 Read entire file
147 Check that file exists
147 Remove duplicate elements
146 Create a file
146 Least common multiple
145 Balanced brackets
145 Count in octal
144 Ethiopian multiplication
144 Happy numbers
144 Roman numerals/Encode
144 Sleep
142 File input/output
142 Mandelbrot set
141 Day of the week
141 Program termination
140 Literals/String
140 Pascal's triangle
139 Date format
139 Literals/Integer
138 Count occurrences of a substring
138 Substring
138 Variables
136 Function composition
136 Knuth shuffle
135 Compound data type
134 Loops/Nested
134 N-queens problem
134 Sorting algorithms/Insertion sort
133 Include a file
133 Pick random element
132 Babbage problem
132 Strip a set of characters from a string
131 Align columns
131 Averages/Median
131 Detect division by zero
131 Letter frequency
131 Matrix transposition
131 Null object
131 String matching
130 Real constants and functions
129 Averages/Root mean square
129 File size
129 Look-and-say sequence
129 Read a file line by line
129 Return multiple values
129 String append
128 Binary search
127 Anagrams
127 Associative array/Iteration
127 Delete a file
127 Guess the number/With feedback
127 Hash from two arrays
127 Matrix multiplication
126 Conway's Game of Life
126 Perfect numbers
125 Flatten a list
125 Harshad or Niven series
125 Identity matrix
124 Haversine formula
124 Input loop
123 Call a function
123 Case-sensitivity of identifiers
123 Environment variables
123 Roman numerals/Decode
122 Comma quibbling
122 Find limit of recursion
122 Levenshtein distance
122 Sierpinski triangle
121 Classes
120 Assertions
120 Bulls and cows
120 Pangram checker
120 Run-length encoding
120 Variadic function
119 Search a list
119 String interpolation (included)
119 Substring/Top and tail
118 Arithmetic/Complex
118 HTTP
118 Rename a file
117 Formatted numeric output
117 Horner's rule for polynomial evaluation
117 Multiplication tables
117 Reverse words in a string
117 Sum multiples of 3 and 5
117 The Twelve Days of Christmas
116 Averages/Pythagorean means
116 Evaluate binomial coefficients
116 Infinity
116 Strip whitespace from a string/Top and tail
115 Accumulator factory
115 Hostname
115 Ordered words
115 Sum digits of an integer
114 Create a two-dimensional array at runtime
114 Permutations
114 Program name
114 Sequence of non-squares
114 Temperature conversion
113 Anonymous recursion
113 Digital root
113 Sorting algorithms/Merge sort
113 String prepend
113 Zig-zag matrix
111 Amicable pairs
111 Calculating the value of e
111 Catalan numbers
111 Combinations
111 Middle three digits
111 Queue/Definition
111 Trigonometric functions
110 Exceptions
110 Random numbers
109 24 game
109 Abundant, deficient and perfect number classifications
109 Shell one-liner
109 Vector products
108 Evolutionary algorithm
108 Prime decomposition
108 Short-circuit evaluation
108 Time a function
107 Arbitrary-precision integers (included)
107 Arithmetic-geometric mean
107 Hello world/Newbie
106 Enumerations
106 Symmetric difference
105 Regular expressions
105 Show ASCII table
104 Power set
104 Sorting algorithms/Selection sort
104 Tree traversal
103 Averages/Mode
103 Gray code
103 Hofstadter Q sequence
103 Walk a directory/Non-recursively
102 Collections
102 Exponentiation operator
102 Floyd's triangle
102 N'th
101 Execute Brain****
101 Hamming numbers
101 Interactive programming (repl) O O O
101 Map range
101 Nth root
101 Y combinator
100 Create an HTML table
100 Entropy
100 Sort using a custom comparator
99 MD5
99 Modular inverse
99 Monty Hall problem
99 Range expansion
99 String comparison
98 Catamorphism
98 First-class functions
98 Number reversal game
98 Random number generator (included)
97 Address of a variable O O
97 Langton's ant
97 Sorting algorithms/Bogosort
97 Sorting algorithms/Cocktail sort
97 Sorting algorithms/Heapsort
97 Split a character string based on change of character
96 Compare a list of strings
96 Forward difference
96 Last Friday of each month
96 Menu
96 Range extraction
96 Sierpinski carpet
95 Inheritance/Single O
95 JSON
95 Sorting algorithms/Gnome sort
95 Terminal control/Clear the screen
94 Abstract type O O
94 Almost prime
94 Averages/Simple moving average
94 Cumulative standard deviation
94 Number names
94 One-dimensional cellular automata
93 Anti-primes
93 Box the compass
93 CSV data manipulation
93 Greatest subsequential sum
93 Repeat
93 Simple windowed application
92 Count in factors
92 Five weekends
92 Literals/Floating point
92 Multifactorial
92 Non-decimal radices/Convert
91 Department numbers
91 Munchausen numbers
91 Population count
91 Set
90 Count the coins
90 Find the last Sunday of each month
90 Hello world/Line printer
90 Long multiplication
90 Operator precedence
90 Order two numerical lists
90 Playing cards
90 Queue/Usage
90 URL decoding
90 Window creation
89 CSV to HTML translation
89 Price fraction
89 Proper divisors
89 Sort an array of composite structures
89 Thue-Morse
89 Word wrap
88 Additive primes
88 Benford's law
88 Bitmap
88 CRC-32
88 Find common directory path
88 Here document O
88 Josephus problem
88 SEDOLs
88 Strip comments from a string
88 Terminal control/Ringing the terminal bell
88 Top rank per group
88 Walk a directory/Recursively
87 100 prisoners
87 Closures/Value capture
87 Introspection
87 Read a specific line from a file
87 URL encoding
86 15 puzzle game
86 Angle difference between two bearings
86 Attractive numbers
86 File modification time
86 Jump anywhere
86 Knapsack problem/0-1
86 Lucas-Lehmer test
86 Pythagorean triples
86 Singly-linked list/Traversal
86 Spiral matrix
85 Call an object method
85 Convert seconds to compound duration
85 Extend your language O
85 Find the missing permutation
85 Jensen's Device
85 Priority queue
85 Sorting algorithms/Shell sort
84 Dynamic variable names O O
84 Kaprekar numbers
84 Monte Carlo methods
84 Rep-string
84 Show the epoch
84 Sockets
84 Take notes on the command line
83 Dragon curve
83 Fibonacci n-step number sequences
83 Gamma function
83 Keyboard input/Obtain a Y or N response
83 Linear congruential generator
83 Man or boy test
83 Old lady swallowed a fly
83 Pernicious numbers
83 Pi
83 Sequence of primes by trial division
83 Sorting algorithms/Counting sort
83 Soundex
83 Special characters
83 XML/Input
82 Animation
82 Concurrent computing
82 Currying
82 Damm algorithm
82 Date manipulation
82 Equilibrium index
82 Jewels and stones
82 Quaternion type
82 Sort disjoint sublist
82 Unicode variable names
82 Web scraping
82 Write entire file
81 Anagrams/Deranged anagrams
81 Calendar
81 Call a foreign-language function
81 Empty directory
81 Flow-control structures
81 Singly-linked list/Element definition
81 Sorting algorithms/Comb sort
81 Vigenère cipher
81 Zeckendorf number representation
80 Averages/Mean angle
80 Exponentiation order
80 Fractal tree
80 Narcissistic decimal number
80 Rock-paper-scissors
80 Semordnilap
79 AKS test for primes
79 Chinese remainder theorem
79 Draw a sphere
79 Euler method
79 Four bit adder
79 Guess the number/With feedback (player)
79 Hello world/Web server
79 List comprehensions
79 Non-decimal radices/Output
79 SHA-1
79 Sort three variables
79 Sudoku
79 Van Eck sequence
78 Execute HQ9+
78 Read a configuration file
78 Semiprime
78 Stern-Brocot sequence
77 Bitmap/Bresenham's line algorithm
77 Catalan numbers/Pascal's triangle
77 Enforced immutability
77 I before E except after C
77 McNuggets problem
77 Roots of unity
77 Self-describing numbers
77 Unix/ls
77 Van der Corput sequence
77 Write float arrays to a text file
77 Yin and yang
76 Combinations with repetitions
76 Exceptions/Catch an exception thrown in a nested call
76 General FizzBuzz
76 Largest int from concatenated ints
76 Multiple distinct objects
76 Phrase reversals
76 Sorting algorithms/Stooge sort
76 Trabb Pardo–Knuth algorithm
75 Constrained random points on a circle
75 ISBN13 check digit
75 Magic 8-ball
75 Maze generation
75 Parsing/RPN calculator algorithm
75 SHA-256
75 Special variables
75 Square but not cube
75 Stair-climbing puzzle
75 Strip control codes and extended characters from a string
74 4-rings or 4-squares puzzle
74 Amb
74 Continued fraction
74 Longest common subsequence
74 Nested function
74 Numerical integration
74 Runtime evaluation O
73 Barnsley fern
73 Determine if a string is collapsible
73 Isqrt (integer square root) of X
73 Magic squares of odd order
73 Named parameters O O
73 Polymorphism
73 Probabilistic choice
73 Tau function
73 Variable size/Get
72 Abundant odd numbers
72 Arithmetic/Rational
72 Closest-pair problem
72 Compile-time calculation
72 Fast Fourier transform
72 Get system command output
72 IBAN
72 Leonardo numbers
72 Morse code
72 RPG attributes generator
72 Smith numbers
72 Sorting algorithms/Pancake sort
72 Subleq
72 Text processing/Max licenses in use
72 Word frequency
71 Best shuffle
71 Circles of given radius through two points
71 Dutch national flag problem
71 Euler's sum of powers conjecture
71 Modular exponentiation
71 One of n lines in a file
71 Primality by Wilson's theorem
71 Roots of a function
71 Singly-linked list/Element insertion
71 Two sum
70 Binary strings
70 Cartesian product of two or more lists
70 Chinese zodiac
70 Disarium numbers
70 Host introspection
70 Long year
70 Memory allocation
70 Reduced row echelon form
70 Remove lines from a file
70 Sort stability
70 Two identical strings
70 Write language name in 3D ASCII
69 Animate a pendulum
69 Arithmetic evaluation
69 CUSIP
69 Cholesky decomposition
69 Documentation
69 Emirp primes
69 Extract file extension
69 Fork
69 Integer overflow
69 Mouse position
69 Remove vowels from a string
69 Runge-Kutta method
68 9 billion names of God the integer
68 Base64 decode data
68 Determine if a string has all the same characters
68 Draw a clock
68 Draw a cuboid
68 Factors of a Mersenne number
68 Hofstadter-Conway $10,000 sequence
68 Longest common substring
68 Miller–Rabin primality test
68 Non-decimal radices/Input
68 Plot coordinate pairs
68 Roots of a quadratic function
68 Sorting algorithms/Sleep sort
68 Undefined values
68 XML/Output
67 Averages/Mean time of day
67 Cantor set
67 Draw a pixel
67 FASTA format
67 Globally replace text in several files
67 HTTPS
67 Optional parameters
67 Quickselect algorithm
67 Tau number
67 Ternary logic
67 Test a function
67 Tic-tac-toe
67 Vector
66 Farey sequence
66 Gapful numbers
66 Inheritance/Multiple
66 Longest common prefix
66 Maximum triangle path sum
66 Pascal matrix generation
66 Terminal control/Display an extended character
66 Totient function
65 2048
65 Base64 encode data
65 Bitmap/Write a PPM file
65 Copy stdin to stdout
65 Knapsack problem/Continuous
65 Knapsack problem/Unbounded
65 Knight's tour
65 Ludic numbers
65 Truncatable primes
65 Unicode strings
64 24 game/Solve
64 Code Golf: Code Golf
64 DNS query
64 Fusc sequence
64 Generator/Exponential
64 Huffman coding
64 JortSort
64 Loops/Increment loop index within loop body
64 Sum of first n cubes
63 Archimedean spiral
63 Brownian tree
63 Discordian date
63 Horizontal sundial calculations
63 Left factorials
63 Odd word problem
63 Partial function application
63 Sattolo cycle
63 Sum of divisors
62 Add a variable to a class instance at runtime O O O
62 Convert decimal number to rational
62 Days between dates
62 Dijkstra's algorithm
62 Dinesman's multiple-dwelling problem
62 Fibonacci word
62 Grayscale image
62 Iterated digits squaring
62 Kernighans large earthquake problem
62 Mad Libs
62 Matrix-exponentiation operator
62 Nim game
62 Terminal control/Coloured text
62 Truncate a file
62 Validate International Securities Identification Number
61 Deal cards for FreeCell
61 Define a primitive data type
61 Doubly-linked list/Element definition
61 Find the intersection of two lines
61 LZW compression
61 Largest proper divisor of n
61 Loops/With multiple ranges
61 Pig the dice game
61 Random number generator (device)
61 Scope modifiers
61 Smallest square that begins with n
61 Sort numbers lexicographically
61 Sorting algorithms/Bead sort
61 Topological sort
61 Unbias a random generator
61 User input/Graphical
61 Words containing "the" substring
60 Bell numbers
60 Bernoulli numbers
60 Extreme floating point values
60 Hash join
60 Inverted syntax O O
60 Keyboard input/Keypress check
60 Multisplit
60 Perfect shuffle
60 Pointers and references
60 Shoelace formula for polygonal area
60 Stem-and-leaf plot
59 Abbreviations, automatic
59 Call a function in a shared library
59 First-class functions/Use numbers analogously
59 Forest fire
59 Holidays related to Easter
59 Password generator
59 Perfect totient numbers
59 Runtime evaluation/In an environment O
59 Singleton
59 Sorting algorithms/Permutation sort
59 Tokenize a string with escaping
59 Universal Turing machine
58 Chaos game
58 Delegates
58 Handle a signal
58 Modulinos
58 Recaman's sequence
58 Rosetta Code/Rank languages by popularity
58 Seven-sided dice from five-sided dice
58 Stack traces
58 Statistics/Basic
58 Wireworld
57 Associative array/Merging
57 Bioinformatics/base count
57 Compare length of two strings
57 Determine if a string has all unique characters
57 Egyptian division
57 Fractran
57 Generate Chess960 starting position
57 Halt and catch fire
57 Heronian triangles
57 Hofstadter Figure-Figure sequences
57 Kronecker product
57 Longest string challenge
57 Naming conventions
57 Rate counter
57 Search a list of records
57 Sierpinski triangle/Graphical
57 Strange plus numbers
57 Water collected between towers
57 XML/XPath
56 Extensible prime generator
56 Gaussian elimination
56 Jaro similarity
56 Non-continuous subsequences
56 Polynomial regression
56 Send email O
56 Strip block comments
56 Ulam spiral (for primes)
55 Longest increasing subsequence
55 Mertens function
55 Move-to-front algorithm
55 Munching squares
55 Spinning rod animation/Text
55 Synchronous concurrency
55 Terminal control/Cursor positioning
55 Text processing/2
55 XML/DOM serialization
54 21 game
54 Aliquot sequence classifications
54 Average loop length
54 Determinant and permanent
54 Determine if a string is squeezable
54 Doubly-linked list/Element insertion
54 Elementary cellular automaton
54 Execute a Markov algorithm
54 Greyscale bars/Display
54 Hilbert curve
54 Idiomatically determine all the lowercase and uppercase letters
54 Odd and square numbers
54 Text between
54 The Name Game
54 Zebra puzzle
53 Append a record to the end of a text file
53 Chowla numbers
53 Convex hull
53 Digital root/Multiplicative digital root
53 Dining philosophers
53 Doubly-linked list/Traversal
53 Image noise
53 MAC vendor lookup
53 Make directory path
53 Musical scale
53 Sum of the digits of n is substring of n
52 Casting out nines
52 Currency
52 Find words which contains more than 3 e vowels
52 Floyd-Warshall algorithm
52 GUI component interaction
52 Matrix with two diagonals
52 Metaprogramming
52 Numbers divisible by their individual digits, but not by the product of their digits.
52 Polynomial long division
52 Stable marriage problem
52 Start from a main routine O O
52 Substitution cipher
52 Text processing/1
51 ABC words
51 Abbreviations, easy
51 Bitmap/Flood fill
51 Colour bars/Display
51 Colour pinstripe/Display
51 Doubly-linked list/Definition
51 History variables
51 Permutations/Derangements
51 Respond to an unknown method call
51 Set consolidation
51 Strange numbers
51 Taxicab numbers
51 Variable size/Set
51 Verify distribution uniformity/Naive
50 Approximate equality
50 Bitmap/Midpoint circle algorithm
50 Bitmap/Read a PPM file
50 Brazilian numbers
50 Combinations and permutations
50 Humble numbers
50 Lah numbers
50 Last letter-first letter
50 Polymorphic copy
50 Problem of Apollonius
50 Send an unknown method call
50 Sequence: smallest number with exactly n divisors
50 Sorting algorithms/Radix sort
50 Sparkline in unicode
50 Twelve statements
50 Visualize a tree
49 Active object
49 Coprimes
49 Deepcopy
49 Element-wise operations
49 File extension is in extensions list
49 Find square difference
49 Magnanimous numbers
49 Narcissist
49 Nice primes
49 OpenGL
49 Parsing/Shunting-yard algorithm
49 Permutations by swapping
49 UTF-8 encode and decode
48 10001th prime
48 Balanced ternary
48 Bulls and cows/Player
48 Color of a screen pixel
48 Continued fraction/Arithmetic/Construct from rational number
48 Determine if only one instance is running
48 Feigenbaum constant calculation
48 Find prime n such that reversed n is also prime
48 Flipping bits game
48 GUI/Maximum window dimensions
48 Golden ratio/Convergence
48 Julia set
48 Long primes
48 Palindrome dates
48 Product of divisors
48 Pseudo-random numbers/Middle-square method
48 Secure temporary file
48 Shift list elements to left by 3
48 Sorting Algorithms/Circle Sort
48 Special divisors
48 Speech synthesis O
48 Subtractive generator
48 Sum to 100
48 Truth table
48 Yellowstone sequence
47 Ascending primes
47 Base 16 numbers needing a to f
47 Count how many vowels and consonants occur in a string
47 Echo server
47 Factorions
47 Find words which contains all the vowels
47 Fivenum
47 Input/Output for pairs of numbers
47 Keyboard input/Flush the keyboard buffer
47 Knapsack problem/Bounded
47 Loops/Wrong ranges
47 Mersenne primes
47 Show the (decimal) value of a number of 1s appended with a 3, then squared
47 Sudan function
47 Sutherland-Hodgman polygon clipping
47 Table creation/Postal addresses
47 Terminal control/Dimensions
47 Triplet of three numbers
47 Type detection
46 Abbreviations, simple
46 Atomic updates
46 Carmichael 3 strong pseudoprimes
46 Compiler/lexical analyzer
46 Extra primes
46 Find the intersection of a line with a plane
46 Hickerson series of almost integers
46 Largest number divisible by its digits
46 Pascal's triangle/Puzzle
46 Primorial numbers
46 Pythagorean quadruples
46 Rosetta Code/Count examples
46 Safe primes and unsafe primes
46 Sequence: smallest number greater than previous term with exactly n divisors
46 Sort a list of object identifiers
46 Sorting algorithms/Patience sort
46 Steady squares
46 Unique characters
45 Arithmetic-geometric mean/Calculate Pi
45 Cheryl's birthday
45 Church numerals
45 Cycle detection
45 Digit fifth powers
45 Display a linear combination
45 Eban numbers
45 Euler's identity
45 Fairshare between two and more
45 Find prime numbers of the form n*n*n+2
45 Integer roots
45 MD5/Implementation
45 Permutations with repetitions
45 Ranking methods
45 Read a file character by character/UTF8
45 S-expressions
45 Sailors, coconuts and a monkey problem
45 Terminal control/Hiding the cursor
45 Variable-length quantity
45 Voronoi diagram
44 Brace expansion
44 Chaocipher
44 Cramer's rule
44 Cuban primes
44 Find squares n where n+1 is prime
44 Find words whose first and last three letters are equal
44 Four is magic
44 Frobenius numbers
44 Input/Output for lines of text
44 Kahan summation
44 Koch curve
44 Magic squares of doubly even order
44 Modular arithmetic
44 Numerical integration/Adaptive Simpson's method
44 Percentage difference between images
44 Prime conspiracy
44 Primes whose sum of digits is 25
44 Scope/Function names and labels
44 Sorting algorithms/Strand sort
44 Sum of elements below main diagonal of matrix
44 Summarize and say sequence
44 Terminal control/Inverse video
44 Test integerness
44 Topswops
44 Vampire number
43 Arithmetic numbers
43 Bitwise IO
43 Calendar - for "REAL" programmers O O
43 Cousin primes
43 Function prototype O
43 GUI enabling/disabling of controls
43 Implicit type conversion
43 Inverted index
43 Knuth's algorithm S
43 Metronome
43 Numbers with prime digits whose sum is 13
43 Parallel calculations
43 Penney's game
43 Pythagoras tree
43 Ray-casting algorithm
43 Sort the letters of string in alphabetical order
43 Statistics/Normal distribution
43 Xiaolin Wu's line algorithm
42 Bitmap/Bézier curves/Cubic
42 Circular primes
42 Dice game probabilities
42 Fibonacci word/fractal
42 Find palindromic numbers in both binary and ternary bases
42 Maze solving
42 Multi-dimensional array
42 Multiple regression
42 Old Russian measure of length
42 Pathological floating point problems
42 Permutation test
42 QR decomposition
42 Rosetta Code/Find bare lang tags
42 Solve the no connection puzzle
41 Alternade words
41 Apply a digital filter (direct form II transposed)
41 Canonicalize CIDR
41 Create a file on magnetic tape O O
41 Diversity prediction theorem
41 Draw a rotating cube
41 Events
41 Find words with alternating vowels and consonants
41 LU decomposition
41 Length of an arc between two angles
41 Longest common suffix
41 Lychrel numbers
41 Metered concurrency
41 Minimum multiple of m where digital sum equals m
41 Möbius function
41 Numbers in base-16 representation that cannot be written with decimal digits
41 Numbers whose binary and ternary digit sums are prime
41 O'Halloran numbers
41 Parametric polymorphism O O O
41 Parsing/RPN to infix conversion
41 Pinstripe/Display
41 Smarandache prime-digital sequence
41 Strange unique prime triplets
41 Successive prime differences
40 AVL tree
40 Abelian sandpile model
40 Break OO privacy
40 Change e letters to i in words
40 Check output device is a terminal
40 Common list elements
40 Deceptive numbers
40 Determine if two triangles overlap
40 Doomsday rule
40 Entropy/Narcissist
40 Find if a point is within a triangle
40 First 9 prime Fibonacci number
40 First power of 2 that has leading decimal digits of 12
40 Harmonic series
40 Machine code
40 Minimum number of cells after, before, above and below NxN squares
40 Numbers with equal rises and falls
40 Numerical integration/Gauss-Legendre Quadrature
40 Polyspiral
40 Positive decimal integers with the digit 1 occurring exactly twice
40 Square-free integers
40 Strong and weak primes
40 Word wheel
40 Zumkeller numbers
39 Algebraic data types
39 Angles (geometric), normalization and conversion
39 Append numbers at same position in strings
39 Bitmap/Bézier curves/Quadratic
39 Calkin-Wilf sequence
39 Conjugate transpose
39 Constrained genericity O O O
39 Create an object at a given address O
39 Find first and last set bit of a long integer
39 Find first missing positive
39 Find minimum number of coins that make a given value
39 Jacobi symbol
39 Minesweeper game
39 Mosaic matrix
39 Motzkin numbers
39 Multiline shebang
39 Mutex O
39 Object serialization
39 Order disjoint list items
39 Parse command-line arguments
39 Perlin noise
39 RIPEMD-160
39 RSA code
39 Set puzzle
39 Subset sum problem
39 Superellipse
39 Terminal control/Unicode output
39 Textonyms
39 Twin primes
38 Common sorted list
38 Esthetic numbers
38 Faulhaber's triangle
38 Gauss-Jordan matrix inversion
38 Greedy algorithm for Egyptian fractions
38 Jacobsthal numbers
38 MD4
38 Maximum difference between adjacent elements of list
38 Negative base numbers
38 Numbers in base 10 that are palindromic in bases 2, 4, and 16
38 Numbers with same digit set in base 10 and base 16
38 Ordered partitions
38 Pentagram
38 Poker hand analyser
38 Pragmatic directives
38 Sorting algorithms/Cycle sort
38 Sum and product puzzle
38 Unique characters in each string
37 Bacon cipher
37 Bin given limits
37 Burrows–Wheeler transform
37 Color wheel
37 Death Star
37 Find words which contain the most consonants
37 First perfect square in base n with n unique digits
37 Four sides of square
37 Galton box animation
37 Mayan numerals
37 Minimum numbers of three lists
37 Neighbour primes
37 Padovan sequence
37 Peano curve
37 Pell's equation
37 Product of min and max prime factors
37 Rosetta Code/Find unimplemented tasks
37 Sexy primes
37 Summarize primes
37 Sylvester's sequence
37 Terminal control/Cursor movement
37 Terminal control/Preserve screen
37 Wieferich primes
37 Words from neighbour ones
36 Chebyshev coefficients
36 Chemical calculator
36 Cullen and Woodall numbers
36 Decimal floating point number to binary
36 Descending primes
36 Faulhaber's formula
36 Generate random numbers without repeating a value
36 Law of cosines - triples
36 Long literals, with continuations
36 Next highest int from digits
36 Numbers which are the cube roots of the product of their proper divisors
36 Partition an integer x into n primes
36 Partition function P
36 Random Latin squares
36 Solve a Hidato puzzle
36 Super-d numbers
36 URL parser
36 Weird numbers
35 Biorhythms
35 Bitmap/Histogram
35 Check input device is a terminal
35 Day of the week of Christmas and New Year
35 Decision tables
35 Deconvolution/1D
35 Distinct power numbers
35 Exactly three adjacent 3 in lists
35 Giuga numbers
35 Increasing gaps between consecutive Niven numbers
35 Klarner-Rado sequence
35 Largest prime factor
35 Memory layout of a data structure
35 Mian-Chowla sequence
35 Minimum positive multiple in base 10 using only 0 and 1
35 Odd words
35 Parameterized SQL statement O
35 Primes with digits in nondecreasing order
35 Pseudo-random numbers/PCG32
35 Reflection/List properties
35 Resistor mesh
35 Set of real numbers
35 Simple database
35 Stirling numbers of the first kind
35 Topic variable O O O
35 Unprimeable numbers
35 Use another language to call a function
35 Verify distribution uniformity/Chi-squared test
35 Window creation/X11
35 Word break problem
34 Bioinformatics/Sequence mutation
34 Deming's funnel
34 Duffinian numbers
34 Euler's constant 0.5772...
34 Executable library
34 FTP
34 Finite state machine
34 Monads/Maybe monad
34 Multiplicative order
34 N-smooth numbers
34 Odd squarefree semiprimes
34 Parallel brute force
34 Pierpont primes
34 Prime numbers which contain 123
34 Range consolidation
34 Riordan numbers
34 Stirling numbers of the second kind
34 Straddling checkerboard
34 Video display modes O O
34 Write to Windows event log
34 Zhang-Suen thinning algorithm
33 Almkvist-Giullera formula for pi
33 Bitcoin/address validation
33 Checkpoint synchronization
33 Cistercian numerals
33 Concatenate two primes is also prime
33 Curzon numbers
33 Erdős-primes
33 Execute SNUSP
33 HTTPS/Authenticated
33 Honaker primes
33 Hunt the Wumpus
33 Kronecker product based fractals
33 Largest five adjacent number
33 Last list item
33 Legendre prime counting function
33 Mind boggling card trick
33 Piprimes
33 Prime triplets
33 Ramer-Douglas-Peucker line simplification
33 Sierpinski arrowhead curve
33 Sierpinski pentagon
33 Sorting algorithms/Cocktail sort with shifting bounds
33 Sum of primes in odd positions is prime
33 Sum of square and cube digits of an integer are primes
33 Summation of primes
32 Chat server
32 Cut a rectangle
32 De Bruijn sequences
32 First class environments
32 Generate random chess position
32 Go Fish
32 Idiomatically determine all the characters that can be used for symbols
32 Keyboard macros
32 Nonoblock
32 Numbers whose count of divisors is prime
32 Numeric error propagation
32 Own digits power sum
32 Plasma effect
32 Ramsey's theorem
32 Reverse the order of lines in a text file while preserving the contents of each line
32 Rosetta Code/Fix code tags
32 Selectively replace multiple instances of a character within a string
32 Sleeping Beauty problem
32 State name puzzle
32 Stream merge
32 Sunflower fractal
32 Table creation
32 Total circles area
31 A* search algorithm
31 Anadromes
31 Arena storage pool
31 Birthday problem
31 Changeable words
31 Check Machin-like formulas
31 Compiler/virtual machine interpreter
31 De Polignac numbers
31 Factorial primes
31 Fermat numbers
31 Honeycombs
31 Idoneal numbers
31 Merge and aggregate datasets
31 Monads/List monad
31 Numeric separator syntax
31 Reflection/List methods
31 Shortest common supersequence
31 Smallest multiple
31 Snake and ladder
31 Spelling of ordinal numbers
31 Teacup rim text
31 The ISAAC cipher
31 Tonelli-Shanks algorithm
31 Update a configuration file
31 Wordle comparison
30 Active Directory/Connect
30 Audio alarm
30 Collect and sort square numbers in ascending order from three lists
30 Consecutive primes with ascending or descending differences
30 Cyclops numbers
30 Decorate-sort-undecorate idiom
30 Find adjacent primes which differ by a square integer
30 Find largest left truncatable prime in a given base
30 Fixed length records
30 Formal power series
30 Function frequency
30 Magic squares of singly even order
30 Natural sorting
30 Orbital elements
30 Order by pair comparisons
30 Palindromic gapful numbers
30 Palindromic primes
30 Percolation/Mean run density
30 Play recorded sounds
30 Prime words
30 Quadrat special primes
30 Safe addition
30 Same fringe
30 Special neighbor primes
30 Sum of two adjacent numbers are primes
30 Superpermutation minimisation
30 Thiele's interpolation formula
29 Base58Check encoding
29 Calmo numbers
29 Card shuffles
29 Continued fraction/Arithmetic/G(matrix ng, continued fraction n)
29 Coprime triplets
29 EKG sequence convergence
29 Euclidean rhythm
29 Exponentiation with infix operators in (or operating on) the base
29 Fraction reduction
29 Intersecting number wheels
29 Longest substrings without repeating characters
29 Magic constant
29 Make a backup file
29 Matrix chain multiplication
29 Nautical bell
29 Next special primes
29 Padovan n-step number sequences
29 Paraffins
29 Parse an IP Address
29 Pseudo-random numbers/Splitmix64
29 Rare numbers
29 Sequence of primorial primes
29 Smallest power of 6 whose decimal expansion contains n
29 Soloway's recurring rainfall
29 Solve a Holy Knight's tour
29 Two's complement
29 UPC
29 Ulam numbers
29 Wilson primes of order n
29 World Cup group stage
28 Abelian sandpile model/Identity
28 Brilliant numbers
28 Cipolla's algorithm
28 Cubic special primes
28 Distributed programming
28 Elementary cellular automaton/Random number generator
28 Elliptic curve arithmetic
28 Euclid-Mullin sequence
28 Image convolution
28 K-means++ clustering
28 Levenshtein distance/Alignment
28 Lucky and even lucky numbers
28 Palindromic primes in base 16
28 Permutations/Rank of a permutation
28 Permuted multiples
28 Playfair cipher
28 Primes which contain only one odd digit
28 Primes whose first and last number is 3
28 Print itself O O
28 Round-robin tournament schedule
28 Self numbers
28 Snake
28 The sieve of Sundaram
28 Wagstaff primes
28 Welch's t-test
28 Yahoo! search interface
27 15 puzzle solver
27 Colorful numbers
27 Commatizing numbers
27 Composite numbers k with no single digit factors whose factors are all substrings of k
27 Determine sentence type
27 File size distribution
27 Getting the number of decimal places
27 Hex words
27 Kolakoski sequence
27 Kosaraju
27 Linux CPU utilization
27 Main step of GOST 28147-89
27 RCRPG
27 Record sound O
27 Reverse the gender of a string
27 Sierpinski curve
27 Simulate input/Keyboard O
27 Special factorials
27 Zeckendorf arithmetic
26 ASCII art diagram converter
26 Achilles numbers
26 Assertions in design by contract
26 Blum integer
26 Camel case and snake case
26 Goldbach's comet
26 Hough transform
26 Inconsummate numbers in base 10
26 Index finite lists of positive integers
26 Largest difference between adjacent primes
26 List rooted trees
26 Markov chain text generator
26 Mastermind
26 Pancake numbers
26 Periodic table
26 Print debugging statement
26 Pseudo-random numbers/Xorshift star
26 Solve a Numbrix puzzle
26 Sort primes from list to a list
26 Sphenic numbers
26 Substring primes
26 Sum data type
25 Active Directory/Search for a user
25 Arithmetic derivative
25 Compiler/code generator
25 Continued fraction/Arithmetic/G(matrix ng, continued fraction n1, continued fraction n2)
25 Eertree
25 Joystick position O O
25 Largest product in a grid
25 Median filter
25 Metallic ratios
25 Modified random distribution
25 Monads/Writer monad
25 N-body problem
25 Native shebang
25 Ormiston pairs
25 Perceptron
25 Permutations with some identical elements
25 Practical numbers
25 Radical of an integer
25 Reflection/Get source
25 SOAP
25 Sequence: nth number with exactly n divisors
25 Sine wave
25 Solve a Hopido puzzle
25 Untrusted environment
25 Variable declaration reset
25 Vibrating rectangles
24 Addition chains
24 Air mass
24 Bilinear interpolation
24 Compiler/syntax analyzer
24 Conjugate a Latin verb
24 Create an object/Native demonstration
24 Erdős-Nicolas numbers
24 Find duplicate files
24 Juggler sequence
24 K-d tree
24 Line circle intersection
24 Matrix digital rain
24 Meissel–Mertens constant
24 Minimum primes
24 Pandigital prime
24 Pisano period
24 Polynomial synthetic division
24 Prime numbers p for which the sum of primes less than or equal to p is prime
24 Quoting constructs
24 Set right-adjacent bits
24 Singly-linked list/Element removal
24 Sokoban
24 Solve triangle solitare puzzle
24 Vigenère cipher/Cryptanalysis
23 Double Twin Primes
23 Draw pixel 2
23 Elementary cellular automaton/Infinite length
23 Fortunate numbers
23 Jordan-Pólya numbers
23 Knuth's power tree
23 Largest palindrome product
23 Latin Squares in reduced form
23 Long stairs
23 Montgomery reduction
23 Names to numbers
23 Nested templated data
23 Nonogram solver
23 Numbers which are not the sum of distinct squares
23 Pairs with common factors
23 Peaceful chess queen armies
23 Percolation/Site percolation
23 Pig the dice game/Player
23 Safe and Sophie Germain primes
23 Smallest numbers
23 Special pythagorean triplet
23 Sub-unit squares
23 Two bullet roulette
23 Useless instructions
23 Vogel's approximation method
22 Bifid cipher
22 Bitcoin/public point to address
22 Compare sorting algorithms' performance
22 Data Encryption Standard
22 Equal prime and composite sums
22 Iccanobif primes
22 Logistic curve fitting in epidemiology
22 Nimber arithmetic
22 Percolation/Mean cluster density
22 Primes - allocate descendants to their ancestors
22 Pseudo-random numbers/Combined recursive generator MRG32k3a
22 Safe mode
22 Selective file copy
22 Separate the house number from the street name
22 Sierpinski square curve
22 Simulate input/Mouse O
22 Tarjan
22 Window management
21 Arithmetic coding/As a generalized change of radix
21 Aspect oriented programming
21 Color quantization
21 Cyclotomic polynomial
21 HTTPS/Client-authenticated
21 Imaginary base numbers
21 Jaro-Winkler distance
21 Just in time processing on a character stream
21 Pseudorandom number generator image
21 Readline interface
21 Repunit primes
21 Rhonda numbers
21 Ruth-Aaron numbers
21 Self-hosting compiler
21 Transportation problem
21 Word ladder
20 Bitmap/Read an image through a pipe
20 Bézier curves/Intersections
20 Code segment unload
20 Compiler/AST interpreter
20 Distribution of 0 digits in factorial series
20 Execute Computer/Zero
20 Minimal steps down to 1
20 Most frequent k chars distance
20 OpenWebNet password
20 Ormiston triples
20 P-value correction
20 Pell numbers
20 Penta-power prime seeds
20 Prime triangle
20 Proof O O
20 SQL-based authentication
20 Simulated annealing
20 Square root by hand
20 Terminal control/Positional read O
20 Tree from nesting levels
20 Ultra useful primes
20 XML validation
19 Banker's algorithm
19 Bernstein basis polynomials
19 Bitmap/PPM conversion through a pipe
19 CalmoSoft primes
19 Chernick's Carmichael numbers
19 Curve that touches three points
19 Find URI in text
19 Forbidden numbers
19 Free polyominoes enumeration
19 Geohash
19 Gradient descent
19 Home primes
19 Longest palindromic substrings
19 Minkowski question-mark function
19 Penrose tiling
19 Percolation/Bond percolation
19 Quad-power prime seeds
19 Retrieve and search chat history
19 SEND + MORE = MONEY
19 SHA-256 Merkle tree
19 Steffensen's method
19 VList O
19 Wolstenholme numbers
18 Binary coded decimal
18 Bioinformatics/Subsequence
18 Earliest difference between prime gaps
18 Geometric algebra
18 Jaccard index
18 Multiplicatively perfect numbers
18 NYSIIS
18 Non-transitive dice
18 Particle swarm optimization
18 Polynomial derivative
18 Primes: n*2^m+1
18 Ramanujan primes
18 Ramanujan's constant
18 Rendezvous
18 Sorting algorithms/Tree sort on a linked list
18 Square form factorization
18 Suffix tree
18 Three word location
18 Triangular numbers
18 Tropical algebra overloading
18 War card game
18 Word search
18 XXXX redacted
18 Zsigmondy numbers
17 ADFGVX cipher
17 Audio frequency generator O
17 Canny edge detector
17 Even numbers which cannot be expressed as the sum of two twin primes
17 Extreme primes
17 Four is the number of letters in the ...
17 Gotchas
17 Iterators
17 Multi-base primes
17 Overloaded operators
17 Pentomino tiling
17 Rodrigues’ rotation formula
17 Tetris
17 Topological sort/Extracted top item
17 Unit testing
17 Upside-down numbers
17 Walsh matrix
16 Boyer-Moore string search
16 CORDIC
16 Count the coins/0-1
16 Distance and Bearing
16 Faces from a mesh
16 Factorial base numbers indexing permutations of a collection
16 Find Chess960 starting position identifier
16 Functional coverage tree
16 Gaussian primes
16 Graph colouring
16 Interactive help
16 Isograms and heterograms
16 Pan base non-primes
16 Railway circuit
16 Rainbow
16 Ramanujan primes/twins
16 Run as a daemon or service
16 Search in paragraph's text
16 Simple turtle graphics
16 Sisyphus sequence
16 Solve hanging lantern problem
16 Text completion
16 Untouchable numbers
16 Verhoeff algorithm
16 Wordiff
15 ASCII control characters
15 Anaprimes
15 Boustrophedon transform
15 Centroid of a set of N-dimensional points
15 Erdös-Selfridge categorization of primes
15 Inventory sequence
15 Magic numbers
15 Mayan calendar
15 One-time pad
15 Penholodigital squares
15 Prime numbers whose neighboring pairs are tetraprimes
15 Set, the card game
15 Sieve of Pritchard
15 Smarandache-Wellin primes
14 16 puzzle game
14 Binomial transform
14 Checksumcolor
14 Colour pinstripe/Printer O
14 Deconvolution/2D+
14 Display an outline as a nested table
14 Fermat pseudoprimes
14 Fibonacci matrix-exponentiation
14 Generalised floating point addition
14 Greed
14 Hourglass puzzle
14 Knuth-Morris-Pratt string search
14 Launch rocket with countdown and acceleration in stdout
14 N-grams
14 Powerful numbers
14 Suffixation of decimal numbers
14 Super-Poulet numbers
14 Time-based one-time password algorithm
14 Tree datastructures
14 Tupper's self-referential formula
14 Using a speech engine to highlight words
13 Apéry's constant
13 Bioinformatics/Global alignment
13 Catmull–Clark subdivision surface
13 Centre and radius of a circle passing through 3 points in a plane
13 Check if two polygons overlap
13 Countdown
13 Execute CopyPasta Language
13 Factorize string into Lyndon words
13 Least m such that n! + m is prime
13 One-two primes
13 Prime reciprocal sum
13 Range modifications
13 Resistance calculator
13 Singly-linked list/Reversal
13 Singular value decomposition
13 Solve equations with substitution method
13 Spoof game
13 Terminal control/Restricted width positional input/No wrapping
13 Undulating numbers
13 Wasteful, equidigital and frugal numbers
12 Babylonian spiral
12 Brace expansion using ranges
12 Combinations with repetitions/Square digit chain
12 Distinct palindromes within decimal numbers
12 Elliptic Curve Digital Signature Algorithm
12 External sort
12 French Republican calendar
12 Morpion solitaire
12 Parse EBNF
12 Particle fountain
12 Peripheral drift illusion
12 Pinstripe/Printer O
12 Rosetta Code/Rank languages by number of users
12 Rosetta Code/Tasks without examples
12 Starting a web browser
12 Terminal control/Restricted width positional input/With wrapping
12 Transliterate English text using the Greek alphabet
11 Addition-chain exponentiation
11 Check if a polygon overlaps with a rectangle
11 Discrete Fourier transform
11 GSTrans string conversion
11 IPC via named pipe
11 Integer long division
11 N-queens minimum and knights and bishops
11 Numerical and alphabetical suffixes
11 OpenGL/Utah teapot
11 Rice coding
11 Smallest enclosing circle problem
11 Sorensen–Dice coefficient
11 Sort an outline at every level
11 Statistics/Chi-squared distribution
11 URL shortener
11 Worthwhile task shaving
10 Compiler/Verifying syntax
10 Cycles of a permutation
10 Factor-perfect numbers
10 Hex dump
10 Numbers k such that the last letter of k is the same as the first letter of k+1
10 Price list behind API
10 Raster bars
10 Resistance network calculator
10 Robots
10 Smallest number k such that k+2^m is composite for all m less than k
10 Strassen's algorithm
10 Tamagotchi emulator
10 Text to HTML
10 Universal Lambda Machine
10 User defined pipe and redirection operators
9 Audio overlap loop
9 B-spline
9 Black box
9 Consistent overhead byte stuffing
9 Doubly-linked list/Element removal
9 Eisenstein primes
9 Engel expansion
9 Fibonacci heap
9 Greatest prime dividing the n-th cubefree number
9 I'm a software engineer, get me out of here
9 Marching squares
9 Multidimensional Newton-Raphson method
9 OpenGL pixel shader
9 Random sentence from book
9 Rosetta Code/Run examples
9 Sealed classes and methods
9 Segmentation fault protection
8 Dating agency
8 Hexapawn
8 Horse racing
8 Inner classes
8 JSON pointer
8 Lagrange Interpolation
8 Lucas-Carmichael numbers
8 P-Adic numbers, basic
8 Recursive descent parser generator
8 Remote agent/Agent logic
8 Remote agent/Simulation
8 Simulated optics experiment/Data analysis
8 Simulated optics experiment/Simulator
8 Syntax highlighting using Mediawiki formatting
8 Variadic fixed-point combinator
8 Waveform analysis/Doh ray me O
8 WiktionaryDumps to words
7 Anagram generator
7 Autogram checker
7 Boids
7 Chess player
7 Compiler/Simple file inclusion pre processor
7 Create an executable for a program in an interpreted language
7 Dominoes
7 English cardinal anagrams
7 Exponential digital sums
7 Latin Squares in reduced form/Randomizing using Jacobson and Matthews' technique
7 Process SMIL directives in XML data
7 Red black tree sort
7 Remote agent/Agent interface
7 Roots of a cubic polynomial
7 Selection bias in clinical sciences
7 Solve a Rubik's cube
7 Wave function collapse
6 CLI-based maze-game
6 Convert CSV records to TSV
6 Create your own text control codes
6 Divide a rectangle into a number of unequal triangles
6 Erdős–Woods numbers
6 Goodstein Sequence
6 Lyndon word
6 Multiton
6 OLE automation O
6 P-Adic square roots
6 Posit numbers/encoding
6 Rosetta Code/List authors of task descriptions
6 Szymański's algorithm
6 Ukkonen’s suffix tree construction
6 Use a REST API
6 Vidir
6 Visitor pattern
5 Carmichael lambda function
5 Continued fraction convergents
5 Diophantine linear system solving
5 Generalised floating point multiplication
5 Number triplets game
5 Posit numbers/decoding
5 Sanitize user input
5 Solving coin problems
5 Sturmian word
5 Unicode polynomial equation
5 Waveform analysis/Top and tail O
5 Weather routing
4 15 puzzle game in 3D
4 Blackjack strategy
4 Color separation
4 Compiler/Preprocessor
4 Cross compilation
4 IRC gateway
4 Protecting Memory Secrets
4 Uno (card game)
4 WebGL rotating F
3 3d turtle graphics
3 Elevator simulation