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Rosetta Code/Count examples/Full list/Tier 4

From Rosetta Code

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 Scala         ㉜ Delphi        ㉝ Lua           ㉞ XPL0          ㉟ EasyLang     
    ㊱ F_Sharp       ㊲ PicoLisp      ㊳ Ring          ㊴ AutoHotkey    ㊵ JavaScript   
As of 2024-11-25T22:58:31Z :: Tasks: 1304 :: Draft Tasks:383 :: Total Tasks: 1687 :: Total Examples: 99186
Count Task
603 Hello world/Text
392 FizzBuzz
383 99 bottles of beer
359 100 doors
315 Comments
313 Factorial
313 Fibonacci sequence
307 A+B
296 Empty program
257 Reverse a string
252 Loops/Infinite
250 Ackermann function
248 Arrays
248 Function definition
243 Loops/For
237 Conditional structures
236 Loops/While
228 Array concatenation
222 Arithmetic/Integer
218 Greatest element of a list
212 Greatest common divisor
211 Repeat a string
209 Even or odd
207 Increment a numerical string
207 Sieve of Eratosthenes
206 Array length
203 Binary digits
200 Averages/Arithmetic mean
199 Hello world/Graphical
199 String concatenation
198 Copy a string
198 Towers of Hanoi
196 Rot-13
193 Loops/Downward for
193 Sum and product of an array
191 Boolean values
191 Hello world/Newline omission
191 Integer comparison
191 Palindrome detection
190 Character codes
189 Apply a callback to an array
188 Integer sequence
187 String length
186 Loops/For with a specified step
186 Tokenize a string
185 String case
183 Loops/Break
183 Sum of a series
182 Empty string
182 Loops/Foreach
180 Quine
179 Sum of squares
177 Logical operations
176 Dot product
175 Filter
175 Hailstone sequence
174 Loops/Do-while
168 Loops/N plus one half
166 Generic swap
166 Leap year
165 Caesar cipher
164 Associative array/Creation
163 Sort an integer array
161 Determine if a string is numeric
161 Generate lower case ASCII alphabet
161 Luhn test of credit card numbers
159 Command-line arguments O
159 User input/Text
158 Stack
158 System time
157 Zero to the zero power
156 ABC problem
156 Execute a system command O
156 Factors of an integer
156 Hello world/Standard error O
156 Loop over multiple arrays simultaneously
155 Higher-order functions
155 Loops/Continue O
154 Primality by trial division
153 Mutual recursion
153 Sorting algorithms/Quicksort
152 Bitwise operations
152 Sorting algorithms/Bubble sort
150 Check that file exists O
150 Guess the number
150 Least common multiple
150 Read entire file
150 Remove duplicate elements
148 Balanced brackets
148 Create a file O
147 Count in octal
147 Day of the week
146 Ethiopian multiplication
146 File input/output O
146 Roman numerals/Encode
145 Happy numbers
145 Sleep
144 Count occurrences of a substring
144 Date format
144 Mandelbrot set
144 Substring
143 Pascal's triangle
142 Literals/String
142 Program termination
140 Literals/Integer
140 Strip a set of characters from a string
140 Variables
138 Compound data type
138 Function composition
138 Knuth shuffle
137 Babbage problem
137 Pick random element
136 Letter frequency
136 Loops/Nested
136 N-queens problem
135 Include a file O
135 Matrix transposition
135 Null object
135 String matching
134 Averages/Median
134 Averages/Root mean square
134 Sorting algorithms/Insertion sort
132 Align columns
132 Anagrams
132 Detect division by zero
132 Read a file line by line
132 Return multiple values
131 Binary search
131 File size O
131 Hash from two arrays
131 Look-and-say sequence
131 Matrix multiplication
130 Associative array/Iteration
130 Flatten a list
130 String append
129 Conway's Game of Life
129 Identity matrix
128 Delete a file O
128 Find limit of recursion
128 Sierpinski triangle
127 Guess the number/With feedback
127 Harshad or Niven series
127 Perfect numbers
126 Comma quibbling
126 Environment variables
126 Input loop
126 Levenshtein distance
125 Case-sensitivity of identifiers
125 Haversine formula
125 Real constants and functions
125 Roman numerals/Decode
124 Call a function
124 Ordered words
124 Run-length encoding
124 String interpolation (included)
124 Substring/Top and tail
123 Classes
123 Reverse words in a string
123 Strip whitespace from a string/Top and tail
122 Assertions
122 Bulls and cows
121 Arithmetic/Complex
121 Formatted numeric output
121 Multiplication tables
121 Pangram checker
121 Search a list
121 Variadic function
120 Rename a file O
119 Averages/Pythagorean means
119 Combinations
119 Create a two-dimensional array at runtime
119 Evaluate binomial coefficients
119 HTTP O
119 Sum digits of an integer
119 Sum multiples of 3 and 5
118 Horner's rule for polynomial evaluation
117 Anonymous recursion
117 Calculating the value of e
117 Hostname
117 Infinity
117 Permutations
117 The Twelve Days of Christmas
116 Accumulator factory
116 Program name O
116 Temperature conversion
115 Digital root
115 Random numbers
115 String prepend
115 Zig-zag matrix
114 Sequence of non-squares
113 24 game
113 Catalan numbers
113 Queue/Definition
113 Sorting algorithms/Merge sort
113 Vector products
112 Evolutionary algorithm
112 Exceptions
112 Middle three digits
112 Trigonometric functions
111 Amicable pairs
111 Arbitrary-precision integers (included) O
111 Arithmetic-geometric mean
111 Time a function
110 Shell one-liner O
109 Abundant, deficient and perfect number classifications
109 Enumerations
109 N'th
109 Prime decomposition
109 Regular expressions O
109 Short-circuit evaluation
108 Symmetric difference
107 Hello world/Newbie
106 Averages/Mode
106 Floyd's triangle
106 Show ASCII table
106 Split a character string based on change of character
106 Tree traversal
105 Hofstadter Q sequence
105 Power set
104 Collections
104 Create an HTML table
104 Sorting algorithms/Selection sort
104 Walk a directory/Non-recursively
103 Execute Brain****
103 Hamming numbers
103 Range expansion
103 String comparison
103 Y combinator
102 Entropy
102 Exponentiation operator
102 Map range
102 Nth root
101 Catamorphism
101 Interactive programming (repl) O O
101 MD5
101 Sort using a custom comparator
100 Address of a variable O
100 Forward difference
100 Last Friday of each month
99 Compare a list of strings
99 First-class functions
99 Gray code
99 Modular inverse
99 Number reversal game
99 Random number generator (included)
99 Sorting algorithms/Cocktail sort
98 CSV data manipulation
98 Langton's ant
98 Range extraction
98 Sorting algorithms/Bogosort
98 Sorting algorithms/Heapsort
98 Terminal control/Clear the screen
97 Cumulative standard deviation
97 Greatest subsequential sum
97 Inheritance/Single
97 JSON
97 Menu
97 Monty Hall problem
97 Repeat
97 Sierpinski carpet
97 Sorting algorithms/Gnome sort
96 Averages/Simple moving average
96 Find the last Sunday of each month
96 One-dimensional cellular automata
95 Abstract type O
95 Anti-primes
95 Five weekends
95 Number names
94 Additive primes
94 Almost prime
94 Box the compass
94 Department numbers
94 Munchausen numbers
94 Population count
94 Simple windowed application O
93 Count in factors
93 Count the coins
93 Find common directory path
93 Here document O
93 Literals/Floating point
93 Non-decimal radices/Convert
93 Operator precedence
93 Playing cards
93 Set
93 Strip comments from a string
93 URL decoding
92 CRC-32
92 CSV to HTML translation
92 Multifactorial
92 Read a specific line from a file
92 Sort an array of composite structures
92 Window creation O
91 Hello world/Line printer
91 Order two numerical lists
91 Queue/Usage
91 Thue-Morse
91 Top rank per group
91 Word wrap
90 100 prisoners
90 Benford's law
90 Bitmap
90 Closures/Value capture
90 Long multiplication
90 Proper divisors
90 SEDOLs
90 Terminal control/Ringing the terminal bell
89 15 puzzle game
89 Dynamic variable names
89 Josephus problem
89 Price fraction
89 Take notes on the command line O
89 Walk a directory/Recursively
88 Find the missing permutation
88 URL encoding
87 Angle difference between two bearings
87 Call an object method
87 Convert seconds to compound duration
87 Extend your language
87 File modification time O
87 Introspection
87 Jump anywhere O
87 Keyboard input/Obtain a Y or N response
87 Pi
87 Rep-string
87 Special characters
87 Spiral matrix
86 Attractive numbers
86 Fibonacci n-step number sequences
86 ISBN13 check digit
86 Jewels and stones
86 Knapsack problem/0-1
86 Lucas-Lehmer test
86 Pythagorean triples
86 Show the epoch O
86 Singly-linked list/Traversal
86 Sorting algorithms/Shell sort
86 XML/Input
85 Averages/Mean angle
85 Gamma function
85 Kaprekar numbers
85 Man or boy test
85 Monte Carlo methods
85 Old lady swallowed a fly
85 Priority queue
85 Semordnilap
85 Sort disjoint sublist
85 Sorting algorithms/Counting sort
84 Date manipulation
84 Dragon curve
84 Equilibrium index
84 Linear congruential generator
84 Sequence of primes by trial division
84 Sockets
84 Soundex
84 Unicode variable names O
83 Concurrent computing
83 I before E except after C
83 Pernicious numbers
83 Phrase reversals
83 Vigenère cipher
83 Write entire file
82 Animation
82 Calendar
82 Call a foreign-language function
82 Currying
82 Flow-control structures
82 List comprehensions
82 Quaternion type
82 Rock-paper-scissors
82 Singly-linked list/Element definition
82 Sorting algorithms/Comb sort
82 Web scraping
81 Anagrams/Deranged anagrams
81 Empty directory
81 Euler method
81 Exponentiation order
81 Fractal tree
81 Jensen's Device
81 Narcissistic decimal number
81 Sort three variables
81 Sudoku
81 Zeckendorf number representation
80 AKS test for primes
80 Chinese remainder theorem
80 Damm algorithm
80 General FizzBuzz
80 Guess the number/With feedback (player)
80 Read a configuration file
80 Square but not cube
80 Stern-Brocot sequence
80 Strip control codes and extended characters from a string
79 Draw a sphere
79 Four bit adder
79 Hello world/Web server
79 Maze generation
79 McNuggets problem
79 Non-decimal radices/Output
79 SHA-1
79 Self-describing numbers
79 Trabb Pardo–Knuth algorithm
79 Van Eck sequence
78 Bitmap/Bresenham's line algorithm
78 Exceptions/Catch an exception thrown in a nested call
78 Execute HQ9+
78 Largest int from concatenated ints
78 Probabilistic choice
78 Semiprime
78 Sorting algorithms/Stooge sort
78 Write float arrays to a text file
77 Barnsley fern
77 Catalan numbers/Pascal's triangle
77 Determine if a string is collapsible
77 Dutch national flag problem
77 Enforced immutability O
77 Longest common prefix
77 Roots of unity
77 Special variables
77 Stair-climbing puzzle
77 Unix/ls
77 Van der Corput sequence
77 Word frequency
77 Yin and yang
76 Combinations with repetitions
76 Constrained random points on a circle
76 Continued fraction
76 IBAN
76 Longest common subsequence
76 Magic 8-ball
76 Multiple distinct objects
76 Nested function
76 Parsing/RPN calculator algorithm
76 Remove vowels from a string
76 SHA-256
75 Amb
75 Binary strings
75 Cartesian product of two or more lists
75 Chinese zodiac
75 Polymorphism
75 Tau function
74 4-rings or 4-squares puzzle
74 Arithmetic/Rational
74 Compile-time calculation O O
74 Determine if a string has all the same characters
74 Fast Fourier transform
74 Get system command output
74 Magic squares of odd order
74 Morse code
74 Numerical integration
74 RPG attributes generator
74 Runtime evaluation
74 Sorting algorithms/Pancake sort
74 Variable size/Get O
73 Base64 decode data
73 Closest-pair problem
73 Draw a cuboid
73 Extract file extension
73 Isqrt (integer square root) of X
73 Modular exponentiation
73 Named parameters
73 Smith numbers
73 Subleq
73 Text processing/Max licenses in use
73 Two sum
72 Abundant odd numbers
72 Best shuffle
72 Disarium numbers
72 Euler's sum of powers conjecture
72 Factors of a Mersenne number
72 Host introspection O
72 Long year
72 Singly-linked list/Element insertion
72 Two identical strings
71 Base64 encode data
71 CUSIP
71 Circles of given radius through two points
71 Emirp primes
71 Leonardo numbers
71 Memory allocation O
71 Mouse position
71 One of n lines in a file
71 Primality by Wilson's theorem
71 Remove lines from a file
71 Roots of a function
70 9 billion names of God the integer
70 Cholesky decomposition
70 Documentation
70 Fork O
70 HTTPS O
70 Reduced row echelon form
70 Sort stability
70 Tic-tac-toe
70 Write language name in 3D ASCII
69 Animate a pendulum
69 Arithmetic evaluation
69 Averages/Mean time of day
69 Draw a clock
69 Draw a pixel
69 Hofstadter-Conway $10,000 sequence
69 Integer overflow
69 Loops/Increment loop index within loop body
69 Miller–Rabin primality test
69 Non-decimal radices/Input
69 Plot coordinate pairs
69 Runge-Kutta method
69 Tau number
69 Test a function
69 Undefined values
69 XML/Output
68 Copy stdin to stdout
68 Gapful numbers
68 Globally replace text in several files
68 Longest common substring
68 Optional parameters
68 Roots of a quadratic function
68 Sorting algorithms/Sleep sort
68 Terminal control/Display an extended character
67 2048
67 Code Golf: Code Golf
67 FASTA format
67 Farey sequence
67 Inheritance/Multiple O
67 Knight's tour
67 Pascal matrix generation
67 Quickselect algorithm
67 Ternary logic
67 Truncatable primes
67 Unicode strings
67 Vector
67 Words containing "the" substring
66 Bitmap/Write a PPM file
66 Cantor set
66 Deal cards for FreeCell
66 Dinesman's multiple-dwelling problem
66 Fusc sequence
66 Generator/Exponential
66 JortSort
66 Knapsack problem/Continuous
66 Knapsack problem/Unbounded
66 Left factorials
66 Ludic numbers
66 Maximum triangle path sum
66 Smallest square that begins with n
66 Totient function
65 24 game/Solve
65 Archimedean spiral
65 Brownian tree
65 DNS query
65 Days between dates
65 Fibonacci word
65 Nim game
65 Sort numbers lexicographically
65 Sorting algorithms/Permutation sort
64 Add a variable to a class instance at runtime O O
64 Convert decimal number to rational
64 Define a primitive data type
64 Discordian date
64 Horizontal sundial calculations
64 Huffman coding
64 Loops/With multiple ranges
64 Matrix-exponentiation operator
64 Multisplit
64 Random number generator (device)
64 Sattolo cycle
64 Scope modifiers
64 Sum of divisors
64 Sum of first n cubes
64 Truncate a file
64 User input/Graphical
63 ABC words
63 Associative array/Merging
63 Dijkstra's algorithm
63 Find the intersection of two lines
63 Halt and catch fire
63 Iterated digits squaring
63 Odd word problem
63 Partial function application
63 Strip block comments
63 Terminal control/Coloured text
63 Validate International Securities Identification Number
62 Abbreviations, automatic
62 Bernoulli numbers
62 Compare length of two strings
62 Doubly-linked list/Element definition
62 Extreme floating point values
62 Find words which contains more than 3 e vowels
62 Grayscale image
62 Hash join
62 Kernighans large earthquake problem
62 LZW compression
62 Largest proper divisor of n
62 Mad Libs
62 Password generator
62 Pointers and references O
62 Stem-and-leaf plot
62 Topological sort
61 Determine if a string has all unique characters
61 Inverted syntax O O O
61 Keyboard input/Keypress check
61 Pig the dice game
61 Search a list of records
61 Sierpinski triangle/Graphical
61 Sorting algorithms/Bead sort
61 Unbias a random generator
61 Universal Turing machine
61 Water collected between towers
60 Bell numbers
60 Chaos game
60 First-class functions/Use numbers analogously
60 Forest fire
60 Fractran
60 Perfect shuffle
60 Runtime evaluation/In an environment
60 Shoelace formula for polygonal area
60 Singleton
60 Statistics/Basic
60 Tokenize a string with escaping
59 Bioinformatics/base count
59 Call a function in a shared library O
59 Delegates
59 Egyptian division
59 Handle a signal
59 Heronian triangles
59 Hofstadter Figure-Figure sequences
59 Holidays related to Easter
59 Kronecker product
59 Longest increasing subsequence
59 Modulinos
59 Naming conventions
59 Non-continuous subsequences
59 Perfect totient numbers
59 Rosetta Code/Rank languages by popularity
59 Set consolidation
59 Stack traces
59 Wireworld
58 Determinant and permanent
58 Gaussian elimination
58 Generate Chess960 starting position
58 Rate counter
58 Recaman's sequence
58 Seven-sided dice from five-sided dice
58 Strange plus numbers
58 Sum of the digits of n is substring of n
58 Text between
58 XML/XPath
57 Average loop length
57 Determine if a string is squeezable
57 Extensible prime generator
57 Jaro similarity
57 Longest string challenge
57 Matrix with two diagonals
57 Odd and square numbers
57 Polynomial regression
57 The Name Game
57 XML/DOM serialization
57 Zebra puzzle
56 10001th prime
56 Casting out nines
56 Currency
56 Find words which contains all the vowels
56 Idiomatically determine all the lowercase and uppercase letters
56 Move-to-front algorithm
56 Munching squares
56 Numbers divisible by their individual digits, but not by the product of their digits.
56 Send email O
56 Show the (decimal) value of a number of 1s appended with a 3, then squared
56 Spinning rod animation/Text
56 Stable marriage problem
56 Substitution cipher
56 Synchronous concurrency
56 Terminal control/Cursor positioning
56 Text processing/2
56 Ulam spiral (for primes)
55 Digital root/Multiplicative digital root
55 Doubly-linked list/Element insertion
55 Execute a Markov algorithm
55 Hilbert curve
55 Mertens function
54 21 game
54 Aliquot sequence classifications
54 Append a record to the end of a text file O
54 Chowla numbers
54 Convex hull
54 Count how many vowels and consonants occur in a string
54 Dining philosophers
54 Doubly-linked list/Traversal
54 Elementary cellular automaton
54 Greyscale bars/Display
54 MAC vendor lookup O
54 Musical scale
54 Text processing/1
53 Colour bars/Display
53 Find prime n such that reversed n is also prime
53 Floyd-Warshall algorithm
53 GUI component interaction
53 Image noise
53 Make directory path
53 Permutations/Derangements
53 Problem of Apollonius
53 Start from a main routine O
53 Taxicab numbers
52 Approximate equality
52 Doubly-linked list/Definition
52 Find words whose first and last three letters are equal
52 History variables
52 Last letter-first letter
52 Metaprogramming O
52 Polymorphic copy
52 Polynomial long division
52 Pseudo-random numbers/Middle-square method
52 Respond to an unknown method call O
52 Send an unknown method call
52 Strange numbers
52 Sudan function
52 UTF-8 encode and decode
52 Unique characters
52 Variable size/Set O
52 Verify distribution uniformity/Naive
51 Abbreviations, easy
51 Append numbers at same position in strings
51 Ascending primes
51 Base 16 numbers needing a to f
51 Bitmap/Flood fill
51 Brazilian numbers
51 Combinations and permutations
51 Humble numbers
51 Nice primes
51 Product of divisors
51 Shift list elements to left by 3
51 Sorting algorithms/Radix sort
51 Visualize a tree
50 Bitmap/Midpoint circle algorithm
50 Bitmap/Read a PPM file
50 Bulls and cows/Player
50 Colour pinstripe/Display
50 Continued fraction/Arithmetic/Construct from rational number
50 Coprimes
50 Deepcopy
50 Element-wise operations
50 Feigenbaum constant calculation
50 Find prime numbers of the form n*n*n+2
50 Fivenum
50 Flipping bits game
50 Golden ratio/Convergence
50 Lah numbers
50 Parsing/Shunting-yard algorithm
50 Permutations by swapping
50 Sequence: smallest number with exactly n divisors
50 Sorting Algorithms/Circle Sort
50 Sparkline in unicode
50 Special divisors
50 Subtractive generator
50 Sum to 100
50 Truth table
50 Twelve statements
50 Yellowstone sequence
49 Active object
49 Arithmetic numbers
49 Arithmetic-geometric mean/Calculate Pi
49 Cheryl's birthday
49 Color of a screen pixel O
49 Cycle detection
49 Determine if only one instance is running
49 Display a linear combination
49 File extension is in extensions list
49 Find square difference
49 Find words with alternating vowels and consonants
49 Knapsack problem/Bounded
49 Long primes
49 Loops/Wrong ranges
49 Magnanimous numbers
49 Narcissist
49 OpenGL
49 Palindrome dates
49 Sailors, coconuts and a monkey problem
49 Sort a list of object identifiers
49 Steady squares
49 Table creation/Postal addresses
49 Terminal control/Dimensions
48 Abbreviations, simple
48 Alternade words
48 Balanced ternary
48 Brace expansion
48 Cousin primes
48 Eban numbers
48 Euler's identity
48 Factorions
48 GUI/Maximum window dimensions
48 Input/Output for pairs of numbers
48 Julia set
48 Keyboard input/Flush the keyboard buffer
48 Mersenne primes
48 Safe primes and unsafe primes
48 Secure temporary file
48 Sorting algorithms/Patience sort
48 Speech synthesis
47 Echo server
47 Extra primes
47 Fairshare between two and more
47 Find squares n where n+1 is prime
47 Find the intersection of a line with a plane
47 Hickerson series of almost integers
47 Honaker primes
47 Largest number divisible by its digits
47 MD5/Implementation
47 Numbers with prime digits whose sum is 13
47 Pascal's triangle/Puzzle
47 Primorial numbers
47 Pythagorean quadruples
47 Read a file character by character/UTF8
47 Rosetta Code/Count examples
47 Scope/Function names and labels
47 Sutherland-Hodgman polygon clipping
47 Terminal control/Hiding the cursor
47 Triplet of three numbers
47 Type detection
46 Atomic updates O
46 Bitwise IO
46 Carmichael 3 strong pseudoprimes
46 Chaocipher
46 Compiler/lexical analyzer
46 Cuban primes
46 Frobenius numbers
46 Integer roots
46 Koch curve
46 Longest common suffix
46 Numerical integration/Adaptive Simpson's method
46 Partition an integer x into n primes
46 Permutations with repetitions
46 Primes whose sum of digits is 25
46 Sequence: smallest number greater than previous term with exactly n divisors
46 Summarize and say sequence
45 Church numerals
45 Common list elements
45 Cramer's rule
45 Digit fifth powers
45 Find palindromic numbers in both binary and ternary bases
45 First 9 prime Fibonacci number
45 Four is magic
45 Input/Output for lines of text
45 Inverted index
45 Kahan summation
45 Magic squares of doubly even order
45 Maximum difference between adjacent elements of list
45 Numbers with same digit set in base 10 and base 16
45 Parallel calculations O
45 Parametric polymorphism O
45 Percentage difference between images
45 Prime conspiracy
45 Ranking methods
45 S-expressions
45 Solve the no connection puzzle
45 Sorting algorithms/Strand sort
45 Sum of elements below main diagonal of matrix
45 Terminal control/Inverse video
45 Test integerness
45 Vampire number
45 Variable-length quantity
45 Voronoi diagram
44 Abelian sandpile model
44 Calendar - for "REAL" programmers
44 Check output device is a terminal
44 Circular primes
44 Function prototype O O
44 Harmonic series
44 Implicit type conversion
44 Maze solving
44 Modular arithmetic
44 Numbers in base-16 representation that cannot be written with decimal digits
44 Palindromic primes
44 Penney's game
44 Pinstripe/Display
44 Sort the letters of string in alphabetical order
44 Statistics/Normal distribution
44 Topswops
43 Bitmap/Bézier curves/Cubic
43 Change e letters to i in words
43 Dice game probabilities
43 Doomsday rule
43 Fibonacci word/fractal
43 GUI enabling/disabling of controls
43 Knuth's algorithm S
43 LU decomposition
43 Machine code
43 Metronome
43 Minimum multiple of m where digital sum equals m
43 Mosaic matrix
43 Multiple regression
43 Numbers whose binary and ternary digit sums are prime
43 O'Halloran numbers
43 Pathological floating point problems
43 Pythagoras tree
43 QR decomposition
43 Ray-casting algorithm
43 Rosetta Code/Find bare lang tags
43 Word wheel
43 Xiaolin Wu's line algorithm
42 Determine if two triangles overlap
42 Diversity prediction theorem
42 Draw a rotating cube
42 Events
42 Exactly three adjacent 3 in lists
42 Find first missing positive
42 Find if a point is within a triangle
42 Find minimum number of coins that make a given value
42 Length of an arc between two angles
42 Multi-dimensional array O
42 Numerical integration/Gauss-Legendre Quadrature
42 Old Russian measure of length
42 Order disjoint list items
42 Parsing/RPN to infix conversion
42 Permutation test
42 Poker hand analyser
42 Safe and Sophie Germain primes
42 Smarandache prime-digital sequence
42 Strange unique prime triplets
42 Unique characters in each string
41 AVL tree
41 Angles (geometric), normalization and conversion
41 Apply a digital filter (direct form II transposed)
41 Break OO privacy
41 Calkin-Wilf sequence
41 Canonicalize CIDR
41 Common sorted list
41 Constrained genericity O O
41 Create a file on magnetic tape
41 Deceptive numbers
41 Entropy/Narcissist
41 First power of 2 that has leading decimal digits of 12
41 Lychrel numbers
41 Metered concurrency
41 Minimum number of cells after, before, above and below NxN squares
41 Minimum numbers of three lists
41 Möbius function
41 Object serialization
41 Perlin noise
41 Positive decimal integers with the digit 1 occurring exactly twice
41 Set puzzle
41 Solve a Hidato puzzle
41 Square-free integers
41 Subset sum problem
41 Successive prime differences
41 Twin primes
41 Weird numbers
41 Words from neighbour ones
41 Zumkeller numbers
40 Algebraic data types
40 Bin given limits
40 Changeable words
40 Conjugate transpose
40 Create an object at a given address O
40 Cullen and Woodall numbers
40 Four sides of square
40 Gauss-Jordan matrix inversion
40 Jacobi symbol
40 Mayan numerals
40 Motzkin numbers
40 Negative base numbers
40 Neighbour primes
40 Numbers in base 10 that are palindromic in bases 2, 4, and 16
40 Numbers with equal rises and falls
40 Polyspiral
40 Product of min and max prime factors
40 Strong and weak primes
40 Summarize primes
40 Textonyms
39 Biorhythms
39 Bitmap/Bézier curves/Quadratic
39 Burrows–Wheeler transform
39 Color wheel
39 Erdős-primes
39 Esthetic numbers
39 Find first and last set bit of a long integer
39 First perfect square in base n with n unique digits
39 Giuga numbers
39 Jacobsthal numbers
39 Long literals, with continuations
39 Minesweeper game
39 Multiline shebang
39 Mutex
39 Odd words
39 Parse command-line arguments
39 Peano curve
39 Pragmatic directives
39 RIPEMD-160
39 RSA code
39 Reflection/List properties
39 Rosetta Code/Find unimplemented tasks
39 Sorting algorithms/Cycle sort
39 Superellipse
39 Terminal control/Unicode output
38 Arithmetic derivative
38 Check input device is a terminal
38 Day of the week of Christmas and New Year
38 Death Star
38 Deconvolution/1D
38 Descending primes
38 Distinct power numbers
38 Euler's constant 0.5772...
38 Faulhaber's triangle
38 Find words which contain the most consonants
38 Galton box animation
38 Greedy algorithm for Egyptian fractions
38 Largest prime factor
38 MD4
38 Mian-Chowla sequence
38 Ordered partitions
38 Padovan sequence
38 Partition function P
38 Pentagram
38 Primes with digits in nondecreasing order
38 Ramer-Douglas-Peucker line simplification
38 Range consolidation
38 Sum and product puzzle
38 Terminal control/Cursor movement
38 Wieferich primes
37 Bacon cipher
37 Chemical calculator
37 Concatenate two primes is also prime
37 Decimal floating point number to binary
37 Deming's funnel
37 Determine sentence type
37 Factorial primes
37 Generate random numbers without repeating a value
37 Law of cosines - triples
37 Monads/Maybe monad
37 Next highest int from digits
37 Numbers which are the cube roots of the product of their proper divisors
37 Parameterized SQL statement
37 Pell's equation
37 Piprimes
37 Pseudo-random numbers/PCG32
37 Sexy primes
37 Simple database
37 Sleeping Beauty problem
37 Sylvester's sequence
37 Terminal control/Preserve screen
37 Topic variable O
37 Two's complement
37 URL parser
37 Word break problem
36 Anadromes
36 Bitmap/Histogram
36 Chebyshev coefficients
36 De Bruijn sequences
36 Decision tables
36 Faulhaber's formula
36 Idiomatically determine all the characters that can be used for symbols
36 Increasing gaps between consecutive Niven numbers
36 Odd squarefree semiprimes
36 Prime triplets
36 Random Latin squares
36 Resistor mesh
36 Selectively replace multiple instances of a character within a string
36 Smallest multiple
36 Super-d numbers
36 Use another language to call a function
36 Verify distribution uniformity/Chi-squared test
36 Write to Windows event log
35 Almkvist-Giullera formula for pi
35 Bioinformatics/Sequence mutation
35 Cistercian numerals
35 Curzon numbers
35 Duffinian numbers
35 Executable library
35 FTP
35 HTTPS/Authenticated O
35 Hex words
35 Klarner-Rado sequence
35 Last list item
35 Memory layout of a data structure O
35 Mind boggling card trick
35 Minimum positive multiple in base 10 using only 0 and 1
35 Multiplicative order
35 N-smooth numbers
35 Nonoblock
35 Parallel brute force
35 Pierpont primes
35 Prime numbers which contain 123
35 Set of real numbers
35 Sierpinski arrowhead curve
35 Sierpinski pentagon
35 Stirling numbers of the first kind
35 Stirling numbers of the second kind
35 Straddling checkerboard
35 Summation of primes
35 Unprimeable numbers
35 Window creation/X11 O
34 Bitcoin/address validation
34 Brilliant numbers
34 Collect and sort square numbers in ascending order from three lists
34 Coprime triplets
34 Cut a rectangle
34 Execute SNUSP
34 Fermat numbers
34 Finite state machine
34 First class environments
34 Generate random chess position
34 Hunt the Wumpus
34 Idoneal numbers
34 Kronecker product based fractals
34 Largest five adjacent number
34 Merge and aggregate datasets
34 N-grams
34 Prime words
34 Reflection/List methods
34 Riordan numbers
34 Special neighbor primes
34 State name puzzle
34 Sum of primes in odd positions is prime
34 Sum of square and cube digits of an integer are primes
34 Teacup rim text
34 Total circles area
34 Video display modes
34 Zhang-Suen thinning algorithm
33 Checkpoint synchronization
33 Compiler/virtual machine interpreter
33 Decorate-sort-undecorate idiom
33 Euclidean rhythm
33 Find adjacent primes which differ by a square integer
33 Go Fish
33 Honeycombs
33 Legendre prime counting function
33 Numbers whose count of divisors is prime
33 Own digits power sum
33 Plasma effect
33 Quadrat special primes
33 Sorting algorithms/Cocktail sort with shifting bounds
33 Table creation
33 Update a configuration file
32 15 puzzle solver
32 Arena storage pool
32 Birthday problem
32 Chat server O
32 Cubic special primes
32 Cyclops numbers
32 Find largest left truncatable prime in a given base
32 Keyboard macros
32 Monads/List monad
32 Natural sorting
32 Numeric error propagation
32 Numeric separator syntax
32 Pancake numbers
32 Play recorded sounds
32 Primes which contain only one odd digit
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 Solve a Holy Knight's tour
32 Stream merge
32 Sunflower fractal
32 Thiele's interpolation formula
32 UPC
31 A* search algorithm
31 Audio alarm
31 Bifid cipher
31 Check Machin-like formulas
31 Colorful numbers
31 Conjugate a Latin verb
31 Consecutive primes with ascending or descending differences
31 De Polignac numbers
31 Euclid-Mullin sequence
31 Formal power series
31 Inventory sequence
31 Longest substrings without repeating characters
31 Magic constant
31 Magic squares of singly even order
31 Next special primes
31 Orbital elements
31 Order by pair comparisons
31 Palindromic gapful numbers
31 Palindromic primes in base 16
31 Pseudo-random numbers/Splitmix64
31 Safe addition
31 Same fringe
31 Shortest common supersequence
31 Snake and ladder
31 Spelling of ordinal numbers
31 Superpermutation minimisation
31 The ISAAC cipher
31 Tonelli-Shanks algorithm
31 Ulam numbers
31 Wordle comparison
31 World Cup group stage
30 Abelian sandpile model/Identity
30 Active Directory/Connect
30 Card shuffles
30 Composite numbers k with no single digit factors whose factors are all substrings of k
30 Continued fraction/Arithmetic/G(matrix ng, continued fraction n)
30 EKG sequence convergence
30 Elementary cellular automaton/Random number generator
30 Exponentiation with infix operators in (or operating on) the base
30 Fixed length records
30 Fraction reduction
30 Function frequency
30 Getting the number of decimal places
30 Intersecting number wheels
30 Matrix chain multiplication
30 Parse an IP Address
30 Percolation/Mean run density
30 Primes whose first and last number is 3
30 Reverse the gender of a string
30 Smallest power of 6 whose decimal expansion contains n
30 Solve a Numbrix puzzle
30 Sum data type
30 Sum of two adjacent numbers are primes
29 Base58Check encoding
29 Blum integer
29 Calmo numbers
29 Camel case and snake case
29 Commatizing numbers
29 Distributed programming
29 File size distribution
29 Image convolution
29 Kolakoski sequence
29 Kosaraju
29 Largest difference between adjacent primes
29 Levenshtein distance/Alignment
29 Linux CPU utilization
29 List rooted trees
29 Lucky and even lucky numbers
29 Make a backup file
29 Nautical bell
29 Padovan n-step number sequences
29 Paraffins
29 Permutations/Rank of a permutation
29 Permuted multiples
29 Rare numbers
29 Record sound
29 Self numbers
29 Sequence of primorial primes
29 Snake
29 Soloway's recurring rainfall
29 Sort primes from list to a list
29 Wagstaff primes
29 Welch's t-test
29 Wilson primes of order n
28 ABC correlation
28 ASCII art diagram converter
28 Achilles numbers
28 Cipolla's algorithm
28 Elliptic curve arithmetic
28 Goldbach's comet
28 K-means++ clustering
28 Markov chain text generator
28 N-body problem
28 Pisano period
28 Playfair cipher
28 Print itself O
28 Pseudo-random numbers/Xorshift star
28 RCRPG
28 Round-robin tournament schedule
28 Sine wave
28 Solve triangle solitaire puzzle
28 The sieve of Sundaram
28 Vogel's approximation method
28 Yahoo! search interface O
28 Zeckendorf arithmetic
27 K-d tree
27 Largest product in a grid
27 Main step of GOST 28147-89
27 Metallic ratios
27 Modified random distribution
27 Monads/Writer monad
27 Nested templated data
27 Permutations with some identical elements
27 Prime numbers p for which the sum of primes less than or equal to p is prime
27 Radical of an integer
27 Safe mode
27 Sierpinski curve
27 Sierpinski square curve
27 Simulate input/Keyboard
27 Solve a Hopido puzzle
27 Special factorials
27 Vigenère cipher/Cryptanalysis
27 Word ladder
26 Assertions in design by contract
26 Double Twin Primes
26 Hough transform
26 Inconsummate numbers in base 10
26 Index finite lists of positive integers
26 Mastermind
26 Median filter
26 Meissel–Mertens constant
26 Names to numbers
26 Ormiston pairs
26 Periodic table
26 Print debugging statement
26 SOAP
26 Sphenic numbers
26 Substring primes
26 Variable declaration reset
26 Vibrating rectangles
25 Active Directory/Search for a user
25 Addition chains
25 Bilinear interpolation
25 Bitcoin/public point to address
25 Compare sorting algorithms' performance
25 Continued fraction/Arithmetic/G(matrix ng, continued fraction n1, continued fraction n2)
25 Create an object/Native demonstration O
25 Eertree
25 Erdős-Nicolas numbers
25 Find duplicate files
25 Iccanobif primes
25 Jordan-Pólya numbers
25 Joystick position
25 Largest palindrome product
25 Line circle intersection
25 Matrix digital rain
25 Minimum primes
25 Native shebang
25 Pandigital prime
25 Perceptron
25 Pig the dice game/Player
25 Polynomial synthetic division
25 Practical numbers
25 Quoting constructs
25 Reflection/Get source
25 Sequence: nth number with exactly n divisors
25 Set right-adjacent bits
25 Singly-linked list/Element removal
25 Untrusted environment
25 Useless instructions
24 Air mass
24 Compiler/code generator
24 Compiler/syntax analyzer
24 Draw pixel 2
24 Elementary cellular automaton/Infinite length
24 Equal prime and composite sums
24 Extreme primes
24 Fortunate numbers
24 Jaro-Winkler distance
24 Juggler sequence
24 Latin Squares in reduced form
24 Nonogram solver
24 Numbers which are not the sum of distinct squares
24 Peaceful chess queen armies
24 Pseudo-random numbers/Combined recursive generator MRG32k3a
24 Separate the house number from the street name
24 Smallest numbers
24 Sokoban
24 Special pythagorean triplet
24 Upside-down numbers
23 Binomial transform
23 Geohash
23 Knuth's power tree
23 Long stairs
23 Longest palindromic substrings
23 Montgomery reduction
23 Multiplicatively perfect numbers
23 Pairs with common factors
23 Percolation/Mean cluster density
23 Percolation/Site percolation
23 Primes - allocate descendants to their ancestors
23 Ruth-Aaron numbers
23 Solve hanging lantern problem
23 Sub-unit squares
23 Tarjan
23 Two bullet roulette
23 Window management
22 Bernstein basis polynomials
22 Centre and radius of a circle passing through 3 points in a plane
22 Color quantization
22 Curve that touches three points
22 Cyclotomic polynomial
22 Data Encryption Standard
22 Distribution of 0 digits in factorial series
22 Find URI in text
22 Forbidden numbers
22 Imaginary base numbers
22 Just in time processing on a character stream
22 Logistic curve fitting in epidemiology
22 Nimber arithmetic
22 P-value correction
22 Pell numbers
22 Penta-power prime seeds
22 Readline interface
22 Repunit primes
22 Rhonda numbers
22 Selective file copy
22 Self-hosting compiler
22 Simulate input/Mouse
22 Wolstenholme numbers
22 XXXX redacted
21 ASCII control characters
21 Arithmetic coding/As a generalized change of radix
21 Aspect oriented programming
21 Bitmap/Read an image through a pipe
21 Bézier curves/Intersections
21 Free polyominoes enumeration
21 Gradient descent
21 HTTPS/Client-authenticated O
21 Iterators
21 Minimal steps down to 1
21 Most frequent k chars distance
21 Penrose tiling
21 Pseudorandom number generator image
21 Quad-power prime seeds
21 Rendezvous O
21 SEND + MORE = MONEY
21 Simulated annealing
21 Steffensen's method
21 Three word location
21 Transportation problem
21 Tree from nesting levels
21 Ultra useful primes
21 XML validation
20 ADFGVX cipher
20 Binary coded decimal
20 Bitmap/PPM conversion through a pipe
20 Chernick's Carmichael numbers
20 Code segment unload
20 Compiler/AST interpreter
20 Count the coins/0-1
20 Execute Computer/Zero
20 Gaussian primes
20 Jaccard index
20 NYSIIS
20 Non-transitive dice
20 OpenWebNet password
20 Ormiston triples
20 Percolation/Bond percolation
20 Polynomial derivative
20 Prime triangle
20 Primes: n*2^m+1
20 Proof O
20 Retrieve and search chat history
20 SQL-based authentication
20 Shape-Machine
20 Square root by hand
20 Terminal control/Positional read
20 Topological sort/Extracted top item
20 Walsh matrix
20 War card game
20 Word search
20 Zsigmondy numbers
19 Anaprimes
19 Banker's algorithm
19 Boustrophedon transform
19 CORDIC
19 CalmoSoft primes
19 Earliest difference between prime gaps
19 Factorial base numbers indexing permutations of a collection
19 Functional coverage tree
19 Home primes
19 Mayan calendar
19 Minkowski question-mark function
19 Particle swarm optimization
19 Rodrigues’ rotation formula
19 SHA-256 Merkle tree
19 Tropical algebra overloading
19 Unescape a string
19 VList
18 Audio frequency generator O
18 Bioinformatics/Subsequence
18 Canny edge detector
18 Even numbers which cannot be expressed as the sum of two twin primes
18 Fermat pseudoprimes
18 Find Chess960 starting position identifier
18 Geometric algebra
18 Greatest prime dividing the n-th cubefree number
18 Hex dump
18 Isograms and heterograms
18 Magic numbers
18 One-two primes
18 Overloaded operators
18 Pan base non-primes
18 Pentomino tiling
18 Prime numbers whose neighboring pairs are tetraprimes
18 Rainbow
18 Ramanujan primes
18 Ramanujan's constant
18 Search in paragraph's text
18 Sisyphus sequence
18 Sorting algorithms/Tree sort on a linked list
18 Square form factorization
18 Suffix tree
18 Triangular numbers
18 Wordiff
17 Apéry's constant
17 Check if two polygons overlap
17 Display an outline as a nested table
17 Distinct palindromes within decimal numbers
17 Faces from a mesh
17 Four is the number of letters in the ...
17 Gotchas
17 Graph colouring
17 Multi-base primes
17 Penholodigital squares
17 Prime reciprocal sum
17 Super-Poulet numbers
17 Tetris
17 Tree datastructures
17 Unit testing
17 Untouchable numbers
17 Verhoeff algorithm
16 16 puzzle game
16 Boyer-Moore string search
16 Deconvolution/2D+
16 Distance and Bearing
16 Erdös-Selfridge categorization of primes
16 Interactive help
16 L-system
16 Railway circuit
16 Ramanujan primes/twins
16 Run as a daemon or service
16 Set, the card game
16 Simple turtle graphics
16 Smarandache-Wellin primes
16 Text completion
16 Tupper's self-referential formula
16 Twin primes whose sum is square number
16 Undulating numbers
15 Babylonian spiral
15 Brzozowski algebraic method
15 Catmull–Clark subdivision surface
15 Centroid of a set of N-dimensional points
15 Check if a polygon overlaps with a rectangle
15 Combinations with repetitions/Square digit chain
15 Engel expansion
15 Factorize string into Lyndon words
15 Fibonacci matrix-exponentiation
15 French Republican calendar
15 Greed
15 Hourglass puzzle
15 Least m such that n! + m is prime
15 One-time pad
15 Resistance calculator
15 Sieve of Pritchard
15 Singly-linked list/Reversal
15 Singular value decomposition
15 Solve equations with substitution method
15 Suffixation of decimal numbers
15 Text to HTML
15 Time-based one-time password algorithm
15 Transliterate English text using the Greek alphabet
15 Using a speech engine to highlight words O
14 Checksumcolor
14 Colour pinstripe/Printer
14 Countdown
14 Execute CopyPasta Language
14 Generalised floating point addition
14 Knuth-Morris-Pratt string search
14 Launch rocket with countdown and acceleration in stdout
14 McNaughton-Yamada-Thompson algorithm
14 Numerical and alphabetical suffixes
14 Peripheral drift illusion
14 Powerful numbers
14 Range modifications
14 Smallest number k such that k+2^m is composite for all m less than k
14 Sort an outline at every level
14 Sync subtitles
14 Wasteful, equidigital and frugal numbers
14 Worthwhile task shaving
13 Bioinformatics/Global alignment
13 Brace expansion using ranges
13 Decreasing contiguous subsequences
13 Discrete Fourier transform
13 External sort
13 Factor-perfect numbers
13 GSTrans string conversion
13 Lagrange Interpolation
13 Morpion solitaire
13 Particle fountain
13 Pinstripe/Printer
13 Resistance network calculator
13 Rice coding
13 Rosetta Code/Rank languages by number of users
13 Smallest enclosing circle problem
13 Spoof game
13 Terminal control/Restricted width positional input/No wrapping
12 ABC incremental counts
12 Addition-chain exponentiation
12 B-spline
12 Elliptic Curve Digital Signature Algorithm
12 Hashtron inference
12 IPC via named pipe
12 Inner classes
12 Integer long division
12 Multidimensional Newton-Raphson method
12 N-queens minimum and knights and bishops
12 Numbers k such that the last letter of k is the same as the first letter of k+1
12 Parse EBNF
12 Rosetta Code/Tasks without examples
12 Starting a web browser O
12 Strassen's algorithm
12 Terminal control/Restricted width positional input/With wrapping
12 Variadic fixed-point combinator
11 Anagram generator
11 Carmichael lambda function
11 Compiler/Verifying syntax
11 Doubly-linked list/Element removal
11 Eisenstein primes
11 Hierholzer's algorithm
11 I'm a software engineer, get me out of here
11 JSON pointer
11 Lyndon word
11 OpenGL/Utah teapot
11 Pollard's rho algorithm
11 Price list behind API
11 Raster bars
11 Robots
11 Sealed classes and methods
11 Sorensen–Dice coefficient
11 Statistics/Chi-squared distribution
11 Syntax highlighting using Mediawiki formatting
11 URL shortener
11 User defined pipe and redirection operators
10 Black box
10 Consistent overhead byte stuffing
10 Cycles of a permutation
10 English cardinal anagrams
10 Exponential digital sums
10 Goodstein Sequence
10 Latin Squares in reduced form/Randomizing using Jacobson and Matthews' technique
10 Marching squares
10 P-Adic numbers, basic
10 Random sentence from book
10 Roots of a cubic polynomial
10 Rosetta Code/Run examples
10 Tamagotchi emulator
10 Universal Lambda Machine
10 Waveform analysis/Doh ray me O O
9 Audio overlap loop
9 Dating agency
9 Dominoes
9 Fibonacci heap
9 Horse racing
9 OpenGL pixel shader
9 Segmentation fault protection
9 Selection bias in clinical sciences
9 Visitor pattern
8 Autogram checker
8 Boids
8 Compiler/Simple file inclusion pre processor
8 Continued fraction convergents
8 Hexapawn
8 Lucas-Carmichael numbers
8 P-Adic square roots
8 Posit numbers/decoding
8 Posit numbers/encoding
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 Sturmian word
8 Time conventions and conversions
8 Wave function collapse
8 WiktionaryDumps to words
7 CLI-based maze-game
7 Chess player
7 Convert CSV records to TSV
7 Create an executable for a program in an interpreted language
7 Create your own text control codes
7 Divide a rectangle into a number of unequal triangles
7 Erdős–Woods numbers
7 OLE automation O O
7 Process SMIL directives in XML data
7 Red black tree sort
7 Remote agent/Agent interface
7 Solve a Rubik's cube
7 Ukkonen’s suffix tree construction
7 Vidir
6 Extended Straddling Checkerboard
6 Multiton
6 Number triplets game
6 Rosetta Code/List authors of task descriptions
6 Sanitize user input
6 Szymański's algorithm
6 Use a REST API O
6 Waveform analysis/Top and tail O
5 Diophantine linear system solving
5 Generalised floating point multiplication
5 Protecting Memory Secrets
5 Solving coin problems
5 Unicode polynomial equation
5 Uno (card game)
5 Weather routing
4 15 puzzle game in 3D
4 3d turtle graphics
4 Blackjack strategy
4 Color separation
4 Compiler/Preprocessor
4 Cross compilation
4 Elevator simulation
4 IRC gateway
4 WebGL rotating F
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