Rosetta Code/Count examples/Full list/Tier 4

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Revision as of 20:41, 1 October 2023 by Thundergnat (talk | contribs) (Update full list output - (After a several week hiatus))

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 Rust          ㉜ Lua           ㉝ Scala         ㉞ F_Sharp       ㉟ PicoLisp     
    ㊱ XPL0          ㊲ AutoHotkey    ㊳ Ring          ㊴ JavaScript    ㊵ Arturo       
As of 2023-10-01T20:28:18Z :: Tasks: 1236 :: Draft Tasks:421 :: Total Tasks: 1657 :: Total Examples: 93676
Count Task
579 Hello world/Text
374 99 bottles of beer
374 FizzBuzz
352 100 doors
304 Comments
301 Factorial
301 Fibonacci sequence
294 A+B
287 Empty program
255 Loops/Infinite
248 Reverse a string
244 Arrays
244 Function definition
241 Ackermann function
235 Loops/For
231 Loops/While
227 Conditional structures
220 Array concatenation
214 Arithmetic/Integer
214 Greatest element of a list
204 Increment a numerical string
203 Even or odd
202 Greatest common divisor
201 Repeat a string
199 Sieve of Eratosthenes
197 Array length
197 Averages/Arithmetic mean
193 Hello world/Graphical
192 Copy a string
191 Binary digits
191 String concatenation
190 Towers of Hanoi
189 Sum and product of an array
188 Loops/Downward for
187 Integer comparison
186 Boolean values
186 Integer sequence
185 Hello world/Newline omission
184 Apply a callback to an array
184 Rot-13
183 Character codes
182 Loops/For with a specified step
181 Palindrome detection
181 String length
180 Tokenize a string
179 String case
177 Loops/Break
177 Loops/Foreach
176 Empty string
176 Sum of a series
175 Quine
173 Sum of squares
172 Dot product
172 Filter
171 Logical operations
168 Loops/Do-while
164 Hailstone sequence
162 Associative array/Creation
162 Generic swap
161 Loops/N plus one half
161 Sorting algorithms/Quicksort
159 Caesar cipher
158 Sort an integer array
157 Leap year
156 Generate lower case ASCII alphabet
155 Command-line arguments
155 Execute a system command
155 Luhn test of credit card numbers
155 System time
154 Determine if a string is numeric
153 User input/Text
152 Factors of an integer
152 Higher-order functions
152 Stack
152 Zero to the zero power
151 Loops/Continue
150 ABC problem
150 Hello world/Standard error
149 Guess the number
149 Loop over multiple arrays simultaneously
148 Bitwise operations
148 Sorting algorithms/Bubble sort
147 Primality by trial division
147 Read entire file
146 Create a file
146 Remove duplicate elements
145 Check that file exists
145 Mutual recursion
144 Ethiopian multiplication
144 Least common multiple
144 Roman numerals/Encode
144 Sleep
143 Count in octal
142 Balanced brackets
142 Mandelbrot set
141 Program termination
140 Day of the week
140 Happy numbers
140 Literals/String
139 File input/output
138 Date format
138 Literals/Integer
138 Substring
138 Variables
137 Pascal's triangle
136 Count occurrences of a substring
135 Compound data type
134 Loops/Nested
133 Function composition
133 Include a file O
133 Knuth shuffle
133 Pick random element
132 Sorting algorithms/Insertion sort
131 Matrix transposition
131 String matching
130 Detect division by zero
130 Letter frequency
130 N-queens problem
130 Null object
130 Real constants and functions
129 Averages/Median
129 Averages/Root mean square
129 File size
129 Strip a set of characters from a string
128 Babbage problem
128 Read a file line by line
127 Align columns
127 Associative array/Iteration
127 Delete a file
127 Guess the number/With feedback
127 Return multiple values
126 Binary search
126 Look-and-say sequence
126 Matrix multiplication
126 Perfect numbers
125 Anagrams
125 Flatten a list
125 Hash from two arrays
125 Identity matrix
125 String append
124 Conway's Game of Life
124 Input loop
122 Case-sensitivity of identifiers
122 Haversine formula
121 Call a function
121 Environment variables
121 Harshad or Niven series
121 Roman numerals/Decode
120 Assertions
120 Classes
120 Pangram checker
120 Sierpinski triangle
119 Find limit of recursion
119 String interpolation (included)
119 Substring/Top and tail
118 HTTP
118 Rename a file
118 Variadic function
117 Arithmetic/Complex
117 Multiplication tables
117 Run-length encoding
117 Search a list
116 Bulls and cows
116 Formatted numeric output
116 Horner's rule for polynomial evaluation
116 Levenshtein distance
116 Strip whitespace from a string/Top and tail
116 The Twelve Days of Christmas
115 Comma quibbling
115 Hostname
115 Infinity
114 Anonymous recursion
114 Evaluate binomial coefficients
114 Ordered words
114 Reverse words in a string
113 Accumulator factory
113 Create a two-dimensional array at runtime
113 Permutations
113 Program name
113 Sum multiples of 3 and 5
112 Averages/Pythagorean means
112 String prepend
112 Zig-zag matrix
111 Catalan numbers
111 Combinations
111 Sum digits of an integer
110 Calculating the value of e
110 Digital root
110 Exceptions
110 Middle three digits
110 Queue/Definition
110 Random numbers
110 Sequence of non-squares
110 Sorting algorithms/Merge sort
110 Trigonometric functions
109 Temperature conversion
108 Amicable pairs
108 Shell one-liner O
108 Short-circuit evaluation
108 Time a function
108 Vector products
107 Abundant, deficient and perfect number classifications
107 Arbitrary-precision integers (included) O
107 Arithmetic-geometric mean
106 24 game
106 Enumerations
106 Prime decomposition
105 Hello world/Newbie
105 Regular expressions
105 Show ASCII table
105 Sorting algorithms/Selection sort
104 Evolutionary algorithm
104 Power set
103 Walk a directory/Non-recursively
102 Averages/Mode
102 Collections
102 Gray code
102 Symmetric difference
101 Exponentiation operator
101 Hofstadter Q sequence
101 Interactive programming (repl) O
101 Map range
101 N'th
101 Sorting algorithms/Gnome sort
101 Tree traversal
100 Create an HTML table
100 One-dimensional cellular automata
99 Hamming numbers
99 Modular inverse
99 Monty Hall problem
99 Nth root
99 Range expansion
99 Sort using a custom comparator
99 String comparison
99 Y combinator
98 First-class functions
98 MD5
98 Random number generator (included)
97 Address of a variable O
97 Entropy
97 Langton's ant
97 Sorting algorithms/Cocktail sort
97 Sorting algorithms/Heapsort
96 Forward difference
96 Menu
96 Number reversal game
96 Sierpinski carpet
95 Catamorphism
95 Compare a list of strings
95 Execute Brain****
95 Inheritance/Single
95 Range extraction
95 Sorting algorithms/Bogosort
95 Terminal control/Clear the screen
94 Cumulative standard deviation
94 JSON
94 Last Friday of each month
94 Number names
94 Split a character string based on change of character
93 Abstract type O
93 Anti-primes
93 Averages/Simple moving average
93 CSV data manipulation
93 Floyd's triangle
93 Greatest subsequential sum
93 Repeat
93 Simple windowed application
92 Five weekends
92 Literals/Floating point
91 Almost prime
91 Box the compass
91 Count in factors
91 Non-decimal radices/Convert
91 Set
90 Hello world/Line printer
90 Munchausen numbers
90 Operator precedence
90 URL decoding
90 Window creation
89 CSV to HTML translation
89 Department numbers
89 Long multiplication
89 Playing cards
89 Queue/Usage
89 Sort an array of composite structures
88 Find the last Sunday of each month
88 Order two numerical lists
88 Population count
88 Price fraction
88 Proper divisors
88 SEDOLs
88 Strip comments from a string
88 Top rank per group
88 Walk a directory/Recursively
88 Word wrap
87 Bitmap
87 CRC-32
87 Closures/Value capture
87 Find common directory path
87 Here document
87 Josephus problem
87 Read a specific line from a file
87 Terminal control/Ringing the terminal bell
87 URL encoding
86 File modification time
86 Jump anywhere O
86 Singly-linked list/Traversal
85 Count the coins
85 Extend your language
85 Jensen's Device
85 Knapsack problem/0-1
85 Lucas-Lehmer test
85 Multifactorial
85 Sorting algorithms/Shell sort
85 Thue-Morse
84 15 puzzle game
84 Additive primes
84 Angle difference between two bearings
84 Call an object method
84 Convert seconds to compound duration
84 Dynamic variable names O
84 Find the missing permutation
84 Introspection
84 Monte Carlo methods
84 Priority queue
84 Pythagorean triples
84 Spiral matrix
83 100 prisoners
83 Attractive numbers
83 Dragon curve
83 Fibonacci n-step number sequences
83 Kaprekar numbers
83 Keyboard input/Obtain a Y or N response
83 Sequence of primes by trial division
83 Show the epoch O
83 Sockets
82 Concurrent computing
82 Linear congruential generator
82 Magic squares of odd order
82 Man or boy test
82 Old lady swallowed a fly
82 Pernicious numbers
82 Pi
82 Sorting algorithms/Counting sort
82 Special characters
82 Take notes on the command line
82 Web scraping
82 XML/Input
81 Anagrams/Deranged anagrams
81 Animation
81 Benford's law
81 Call a foreign-language function
81 Date manipulation
81 Empty directory
81 Equilibrium index
81 Gamma function
81 Phrase reversals
81 Sorting algorithms/Comb sort
81 Soundex
81 Vigenère cipher
81 Write entire file
80 Currying
80 Flow-control structures
80 Quaternion type
80 Rock-paper-scissors
80 Semordnilap
80 Singly-linked list/Element definition
80 Sort disjoint sublist
80 Unicode variable names
79 AKS test for primes
79 Averages/Mean angle
79 Calendar
79 Draw a sphere
79 Fractal tree
79 Guess the number/With feedback (player)
79 Hello world/Web server
79 List comprehensions
79 Non-decimal radices/Output
79 Rep-string
79 SHA-1
79 Sudoku
78 Chinese remainder theorem
78 Jewels and stones
78 Read a configuration file
78 Semiprime
77 Damm algorithm
77 Enforced immutability
77 Execute HQ9+
77 Four bit adder
77 Self-describing numbers
77 Unix/ls
77 Van der Corput sequence
76 Combinations with repetitions
76 Euler method
76 Exceptions/Catch an exception thrown in a nested call
76 Exponentiation order
76 General FizzBuzz
76 Largest int from concatenated ints
76 Roots of unity
76 Sort three variables
76 Van Eck sequence
76 Write float arrays to a text file
75 Bitmap/Bresenham's line algorithm
75 Catalan numbers/Pascal's triangle
75 I before E except after C
75 Maze generation
75 Multiple distinct objects
75 Parsing/RPN calculator algorithm
75 SHA-256
75 Sorting algorithms/Stooge sort
75 Special variables
75 Stair-climbing puzzle
75 Stern-Brocot sequence
75 Strip control codes and extended characters from a string
75 Yin and yang
75 Zeckendorf number representation
74 Amb
74 Continued fraction
74 ISBN13 check digit
74 Narcissistic decimal number
74 Nested function
74 Numerical integration
74 Runtime evaluation
74 Square but not cube
74 Trabb Pardo–Knuth algorithm
73 4-rings or 4-squares puzzle
73 Barnsley fern
73 Constrained random points on a circle
73 Longest common subsequence
73 Named parameters O
73 Polymorphism
73 Variable size/Get O
72 Arithmetic/Rational
72 Compile-time calculation O O
72 Fast Fourier transform
72 IBAN
72 Leonardo numbers
72 Magic 8-ball
72 Probabilistic choice
72 Sorting algorithms/Pancake sort
72 Text processing/Max licenses in use
72 Word frequency
71 Abundant odd numbers
71 Determine if a string is collapsible
71 Euler's sum of powers conjecture
71 Get system command output
71 Isqrt (integer square root) of X
71 Modular exponentiation
71 Morse code
71 RPG attributes generator
71 Two sum
70 Best shuffle
70 Binary strings
70 Circles of given radius through two points
70 Closest-pair problem
70 Dutch national flag problem
70 Host introspection O
70 Memory allocation O
70 One of n lines in a file
70 Remove lines from a file
70 Roots of a function
70 Singly-linked list/Element insertion
70 Sort stability
70 Subleq
69 Animate a pendulum
69 Cartesian product of two or more lists
69 Chinese zodiac
69 Cholesky decomposition
69 Extract file extension
69 Fork O
69 Integer overflow
69 McNuggets problem
69 Reduced row echelon form
69 Write language name in 3D ASCII
68 Arithmetic evaluation
68 Documentation
68 Draw a cuboid
68 Emirp primes
68 Factors of a Mersenne number
68 Long year
68 Miller–Rabin primality test
68 Mouse position
68 Non-decimal radices/Input
68 Plot coordinate pairs
68 Runge-Kutta method
68 Sorting algorithms/Sleep sort
68 Tau function
68 Two identical strings
68 XML/Output
67 9 billion names of God the integer
67 Base64 decode data
67 CUSIP
67 Globally replace text in several files
67 HTTPS
67 Optional parameters
67 Quickselect algorithm
67 Remove vowels from a string
67 Roots of a quadratic function
67 Smith numbers
67 Undefined values
66 Averages/Mean time of day
66 Determine if a string has all the same characters
66 Draw a clock
66 Draw a pixel
66 Hofstadter-Conway $10,000 sequence
66 Inheritance/Multiple O
66 Longest common prefix
66 Terminal control/Display an extended character
66 Test a function
66 Tic-tac-toe
66 Vector
65 Base64 encode data
65 Bitmap/Write a PPM file
65 Cantor set
65 Knapsack problem/Continuous
65 Knight's tour
65 Ludic numbers
65 Pascal matrix generation
65 Ternary logic
65 Totient function
64 2048
64 24 game/Solve
64 Copy stdin to stdout
64 DNS query
64 Disarium numbers
64 FASTA format
64 Farey sequence
64 Gapful numbers
64 Generator/Exponential
64 Huffman coding
64 JortSort
64 Knapsack problem/Unbounded
64 Primality by Wilson's theorem
64 Truncatable primes
64 Unicode strings
63 Brownian tree
63 Horizontal sundial calculations
63 Left factorials
63 Longest common substring
63 Loops/Increment loop index within loop body
63 Maximum triangle path sum
63 Sattolo cycle
62 Discordian date
62 Fusc sequence
62 Iterated digits squaring
62 Kernighans large earthquake problem
62 Mad Libs
62 Matrix-exponentiation operator
62 Nim game
62 Odd word problem
62 Partial function application
62 Sum of first n cubes
62 Tau number
62 Terminal control/Coloured text
61 Add a variable to a class instance at runtime O O
61 Archimedean spiral
61 Code Golf: Code Golf
61 Define a primitive data type
61 Dinesman's multiple-dwelling problem
61 Doubly-linked list/Element definition
61 Grayscale image
61 LZW compression
61 Loops/With multiple ranges
61 Random number generator (device)
61 Scope modifiers
61 Sorting algorithms/Bead sort
61 Sum of divisors
61 Topological sort
61 Truncate a file
61 User input/Graphical
60 Bernoulli numbers
60 Convert decimal number to rational
60 Fibonacci word
60 Hash join
60 Inverted syntax O O
60 Keyboard input/Keypress check
60 Multisplit
60 Pointers and references O
60 Stem-and-leaf plot
60 Unbias a random generator
59 Bell numbers
59 Call a function in a shared library
59 Days between dates
59 Deal cards for FreeCell
59 Determine if a string has all unique characters
59 Dijkstra's algorithm
59 Find the intersection of two lines
59 Forest fire
59 Holidays related to Easter
59 Runtime evaluation/In an environment
59 Shoelace formula for polygonal area
59 Singleton
59 Sorting algorithms/Permutation sort
59 Tokenize a string with escaping
59 Universal Turing machine
59 Words containing "the" substring
58 Associative array/Merging
58 Chaos game
58 Delegates
58 First-class functions/Use numbers analogously
58 Modulinos
58 Perfect shuffle
58 Rosetta Code/Rank languages by popularity
58 Seven-sided dice from five-sided dice
58 Stack traces
57 Abbreviations, automatic
57 Extreme floating point values
57 Handle a signal
57 Kronecker product
57 Largest proper divisor of n
57 Naming conventions
57 Password generator
57 Perfect totient numbers
57 Search a list of records
57 Sierpinski triangle/Graphical
57 Sort numbers lexicographically
57 Validate International Securities Identification Number
57 XML/XPath
56 Bioinformatics/base count
56 Compare length of two strings
56 Fractran
56 Heronian triangles
56 Non-continuous subsequences
56 Pig the dice game
56 Rate counter
56 Recaman's sequence
56 Statistics/Basic
56 Strange plus numbers
56 Strip block comments
56 Water collected between towers
55 Egyptian division
55 Extensible prime generator
55 Halt and catch fire
55 Longest increasing subsequence
55 Move-to-front algorithm
55 Munching squares
55 Polynomial regression
55 Send email O
55 Synchronous concurrency
55 Terminal control/Cursor positioning
55 Wireworld
55 XML/DOM serialization
54 Doubly-linked list/Element insertion
54 Gaussian elimination
54 Greyscale bars/Display
54 Hofstadter Figure-Figure sequences
54 Idiomatically determine all the lowercase and uppercase letters
54 Jaro similarity
54 Smallest square that begins with n
54 Spinning rod animation/Text
54 Text processing/2
54 The Name Game
54 Ulam spiral (for primes)
54 Zebra puzzle
53 21 game
53 Aliquot sequence classifications
53 Average loop length
53 Determine if a string is squeezable
53 Digital root/Multiplicative digital root
53 Dining philosophers
53 Doubly-linked list/Traversal
53 Generate Chess960 starting position
53 Hilbert curve
53 Longest string challenge
53 Make directory path
53 Mertens function
53 Musical scale
53 Odd and square numbers
53 Sum of the digits of n is substring of n
52 Append a record to the end of a text file
52 Convex hull
52 Determinant and permanent
52 Elementary cellular automaton
52 Execute a Markov algorithm
52 GUI component interaction
52 Metaprogramming O
52 Numbers divisible by their individual digits, but not by the product of their digits.
52 Stable marriage problem
52 Text processing/1
51 Chowla numbers
51 Doubly-linked list/Definition
51 History variables
51 Image noise
51 Permutations/Derangements
51 Respond to an unknown method call O O
51 Strange numbers
51 Taxicab numbers
51 Text between
50 ABC words
50 Approximate equality
50 Bitmap/Flood fill
50 Bitmap/Midpoint circle algorithm
50 Casting out nines
50 Colour bars/Display
50 Currency
50 Find words which contains more than 3 e vowels
50 Floyd-Warshall algorithm
50 Last letter-first letter
50 MAC vendor lookup
50 Polymorphic copy
50 Polynomial long division
50 Send an unknown method call O
50 Sparkline in unicode
50 Start from a main routine O O
50 Substitution cipher
50 Verify distribution uniformity/Naive
50 Visualize a tree
49 Abbreviations, easy
49 Active object
49 Bitmap/Read a PPM file
49 Brazilian numbers
49 Colour pinstripe/Display
49 Coprimes
49 Element-wise operations
49 Find square difference
49 Matrix with two diagonals
49 OpenGL
49 Problem of Apollonius
49 Set consolidation
49 Sorting algorithms/Radix sort
49 UTF-8 encode and decode
49 Variable size/Set O
48 Color of a screen pixel
48 Continued fraction/Arithmetic/Construct from rational number
48 Deepcopy
48 Determine if only one instance is running
48 File extension is in extensions list
48 GUI/Maximum window dimensions
48 Humble numbers
48 Julia set
48 Narcissist
48 Parsing/Shunting-yard algorithm
48 Secure temporary file
48 Sorting Algorithms/Circle Sort
48 Special divisors
48 TL;DR
48 Twelve statements
47 Bulls and cows/Player
47 Count how many vowels and consonants occur in a string
47 Echo server
47 Factorions
47 Feigenbaum constant calculation
47 Fivenum
47 Flipping bits game
47 Knapsack problem/Bounded
47 Lah numbers
47 Loops/Wrong ranges
47 Nice primes
47 Permutations by swapping
47 Sequence: smallest number with exactly n divisors
47 Shift list elements to left by 3
47 Speech synthesis
47 Sum to 100
47 Sutherland-Hodgman polygon clipping
47 Terminal control/Dimensions
47 Type detection
46 Abbreviations, simple
46 Ascending primes
46 Atomic updates O
46 Combinations and permutations
46 Compiler/lexical analyzer
46 Extra primes
46 Find the intersection of a line with a plane
46 Find words which contains all the vowels
46 Keyboard input/Flush the keyboard buffer
46 Largest number divisible by its digits
46 Palindrome dates
46 Pascal's triangle/Puzzle
46 Product of divisors
46 Rosetta Code/Count examples
46 Sort a list of object identifiers
46 Sorting algorithms/Patience sort
46 Subtractive generator
46 Sudan function
46 Triplet of three numbers
46 Truth table
45 10001th prime
45 Balanced ternary
45 Base 16 numbers needing a to f
45 Cycle detection
45 Digit fifth powers
45 Display a linear combination
45 Euler's identity
45 Find prime numbers of the form n*n*n+2
45 Input/Output for pairs of numbers
45 Long primes
45 MD5/Implementation
45 Primorial numbers
45 Pseudo-random numbers/Middle-square method
45 Pythagorean quadruples
45 Ranking methods
45 Read a file character by character/UTF8
45 S-expressions
45 Safe primes and unsafe primes
45 Sailors, coconuts and a monkey problem
45 Terminal control/Hiding the cursor
45 Variable-length quantity
45 Yellowstone sequence
44 Arithmetic-geometric mean/Calculate Pi
44 Brace expansion
44 Carmichael 3 strong pseudoprimes
44 Cramer's rule
44 Fairshare between two and more
44 Find squares n where n+1 is prime
44 Frobenius numbers
44 Golden ratio/Convergence
44 Hickerson series of almost integers
44 Input/Output for lines of text
44 Integer roots
44 Koch curve
44 Magnanimous numbers
44 Mersenne primes
44 Numerical integration/Adaptive Simpson's method
44 Percentage difference between images
44 Scope/Function names and labels
44 Sorting algorithms/Strand sort
44 Summarize and say sequence
44 Terminal control/Inverse video
44 Unique characters
44 Voronoi diagram
43 Chaocipher
43 Church numerals
43 Find prime n such that reversed n is also prime
43 Find words whose first and last three letters are equal
43 Four is magic
43 Function prototype O O
43 GUI enabling/disabling of controls
43 Implicit type conversion
43 Inverted index
43 Kahan summation
43 Modular arithmetic
43 Permutations with repetitions
43 Prime conspiracy
43 Primes whose sum of digits is 25
43 Sequence: smallest number greater than previous term with exactly n divisors
43 Sort the letters of string in alphabetical order
43 Table creation/Postal addresses
43 Topswops
42 Calendar - for "REAL" programmers
42 Cheryl's birthday
42 Circular primes
42 Cousin primes
42 Eban numbers
42 Fibonacci word/fractal
42 Find palindromic numbers in both binary and ternary bases
42 Knuth's algorithm S
42 Magic squares of doubly even order
42 Multi-dimensional array O
42 Multiple regression
42 Parallel calculations O
42 Pathological floating point problems
42 Penney's game
42 Permutation test
42 Pythagoras tree
42 QR decomposition
42 Rosetta Code/Find bare lang tags
42 Statistics/Normal distribution
42 Steady squares
42 Test integerness
41 Apply a digital filter (direct form II transposed)
41 Bitmap/Bézier curves/Cubic
41 Bitwise IO
41 Create a file on magnetic tape
41 Cuban primes
41 Draw a rotating cube
41 LU decomposition
41 Maze solving
41 Metered concurrency
41 Metronome
41 Numbers whose binary and ternary digit sums are prime
41 Numbers with prime digits whose sum is 13
41 Old Russian measure of length
41 Parametric polymorphism O
41 Pinstripe/Display
41 Ray-casting algorithm
41 Solve the no connection puzzle
41 Sum of elements below main diagonal of matrix
41 Vampire number
41 Xiaolin Wu's line algorithm
40 Alternade words
40 Break OO privacy O
40 Determine if two triangles overlap
40 Dice game probabilities
40 Events
40 Find words with alternating vowels and consonants
40 Length of an arc between two angles
40 Longest common suffix
40 Lychrel numbers
40 Minimum number of cells after, before, above and below NxN squares
40 Numbers in base-16 representation that cannot be written with decimal digits
40 Numbers with equal rises and falls
40 Numerical integration/Gauss-Legendre Quadrature
40 Parsing/RPN to infix conversion
40 Polyspiral
40 Show the (decimal) value of a number of 1s appended with a 3, then squared
40 Smarandache prime-digital sequence
40 Square-free integers
40 Word wheel
39 AVL tree
39 Arithmetic numbers
39 Change e letters to i in words
39 Check output device is a terminal
39 Conjugate transpose
39 Constrained genericity O O
39 Diversity prediction theorem
39 Entropy/Narcissist
39 Find first missing positive
39 First 9 prime Fibonacci number
39 First power of 2 that has leading decimal digits of 12
39 Machine code
39 Minesweeper game
39 Mutex
39 Order disjoint list items
39 RIPEMD-160
39 RSA code
39 Strange unique prime triplets
39 Strong and weak primes
39 Terminal control/Unicode output
38 Abelian sandpile model
38 Algebraic data types
38 Bitmap/Bézier curves/Quadratic
38 Calkin-Wilf sequence
38 Create an object at a given address O
38 Esthetic numbers
38 Faulhaber's triangle
38 Find first and last set bit of a long integer
38 Find if a point is within a triangle
38 Greedy algorithm for Egyptian fractions
38 Harmonic series
38 MD4
38 Multiline shebang
38 Negative base numbers
38 Object serialization
38 Ordered partitions
38 Parse command-line arguments
38 Pentagram
38 Perlin noise
38 Sorting algorithms/Cycle sort
38 Subset sum problem
38 Successive prime differences
38 Superellipse
38 Twin primes
38 Zumkeller numbers
37 Bacon cipher
37 Deceptive numbers
37 Gauss-Jordan matrix inversion
37 Maximum difference between adjacent elements of list
37 Mosaic matrix
37 Motzkin numbers
37 Möbius function
37 Numbers with same digit set in base 10 and base 16
37 Peano curve
37 Pell's equation
37 Poker hand analyser
37 Set puzzle
37 Summarize primes
37 Terminal control/Cursor movement
37 Textonyms
36 Angles (geometric), normalization and conversion
36 Burrows–Wheeler transform
36 Canonicalize CIDR
36 Color wheel
36 Common list elements
36 Death Star
36 Decimal floating point number to binary
36 Find words which contain the most consonants
36 Galton box animation
36 Law of cosines - triples
36 Long literals, with continuations
36 Minimum multiple of m where digital sum equals m
36 Minimum numbers of three lists
36 Neighbour primes
36 Partition function P
36 Positive decimal integers with the digit 1 occurring exactly twice
36 Pragmatic directives
36 Rosetta Code/Find unimplemented tasks
36 Sexy primes
36 Sylvester's sequence
36 Terminal control/Preserve screen
36 URL parser
36 Weird numbers
36 Words from neighbour ones
35 Append numbers at same position in strings
35 Bitmap/Histogram
35 Chemical calculator
35 Common sorted list
35 Decision tables
35 Distinct power numbers
35 Exactly three adjacent 3 in lists
35 Faulhaber's formula
35 Four sides of square
35 Generate random numbers without repeating a value
35 Jacobi symbol
35 Jacobsthal numbers
35 Largest prime factor
35 Mayan numerals
35 Memory layout of a data structure O
35 Mian-Chowla sequence
35 Minimum positive multiple in base 10 using only 0 and 1
35 Numbers which are the cube roots of the product of their proper divisors
35 Odd words
35 Parameterized SQL statement
35 Partition an integer x into n primes
35 Primes with digits in nondecreasing order
35 Product of min and max prime factors
35 Reflection/List properties O
35 Resistor mesh
35 Simple database
35 Solve a Hidato puzzle
35 Sum and product puzzle
35 Topic variable O
35 Unprimeable numbers
35 Use another language to call a function
35 Wieferich primes
35 Word break problem
34 Chebyshev coefficients
34 Check input device is a terminal
34 Cullen and Woodall numbers
34 Day of the week of Christmas and New Year
34 Deconvolution/1D
34 Descending primes
34 Doomsday rule
34 Executable library
34 FTP
34 Monads/Maybe monad
34 Multiplicative order
34 N-smooth numbers
34 Numbers in base 10 that are palindromic in bases 2, 4, and 16
34 Odd squarefree semiprimes
34 Parallel brute force
34 Pierpont primes
34 Straddling checkerboard
34 Unique characters in each string
34 Verify distribution uniformity/Chi-squared test
34 Video display modes
34 Write to Windows event log
34 Zhang-Suen thinning algorithm
33 Bin given limits
33 Biorhythms
33 Bitcoin/address validation
33 Checkpoint synchronization
33 Find minimum number of coins that make a given value
33 First perfect square in base n with n unique digits
33 HTTPS/Authenticated
33 Increasing gaps between consecutive Niven numbers
33 Largest five adjacent number
33 Last list item
33 Next highest int from digits
33 Piprimes
33 Prime numbers which contain 123
33 Random Latin squares
33 Range consolidation
33 Set of real numbers
33 Sierpinski arrowhead curve
33 Sierpinski pentagon
33 Sorting algorithms/Cocktail sort with shifting bounds
33 Stirling numbers of the first kind
33 Stirling numbers of the second kind
33 Sum of primes in odd positions is prime
33 Summation of primes
33 Super-d numbers
32 Bioinformatics/Sequence mutation
32 Chat server O
32 Curzon numbers
32 Duffinian numbers
32 Erdős-primes
32 Euler's constant 0.5772...
32 Execute SNUSP
32 Finite state machine
32 First class environments
32 Generate random chess position
32 Go Fish
32 Hunt the Wumpus
32 Idiomatically determine all the characters that can be used for symbols
32 Keyboard macros
32 Kronecker product based fractals
32 Nonoblock
32 Numeric error propagation
32 Plasma effect
32 Ramsey's theorem
32 Rosetta Code/Fix code tags
32 Selectively replace multiple instances of a character within a string
32 State name puzzle
32 Sum of square and cube digits of an integer are primes
32 Sunflower fractal
32 Window creation/X11 O
31 A* search algorithm
31 Arena storage pool
31 Check Machin-like formulas
31 Compiler/virtual machine interpreter
31 Cut a rectangle
31 Honeycombs
31 Legendre prime counting function
31 Merge and aggregate datasets
31 Monads/List monad
31 Numeric separator syntax
31 Reflection/List methods O
31 Reverse the order of lines in a text file while preserving the contents of each line
31 Sleeping Beauty problem
31 Stream merge
31 Teacup rim text
31 The ISAAC cipher
31 Tonelli-Shanks algorithm
31 Update a configuration file
30 Almkvist-Giullera formula for pi
30 Birthday problem
30 Cistercian numerals
30 De Bruijn sequences
30 Deming's funnel
30 Fermat numbers
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 Giuga numbers
30 Mind boggling card trick
30 Natural sorting
30 Palindromic gapful numbers
30 Palindromic primes
30 Percolation/Mean run density
30 Play recorded sounds
30 Prime triplets
30 Quadrat special primes
30 Same fringe
30 Smallest multiple
30 Snake and ladder
30 Special neighbor primes
30 Superpermutation minimisation
30 Table creation
29 Active Directory/Connect
29 Audio alarm
29 Card shuffles
29 Changeable words
29 Concatenate two primes is also prime
29 Consecutive primes with ascending or descending differences
29 Continued fraction/Arithmetic/G(matrix ng, continued fraction n)
29 Coprime triplets
29 Factorial primes
29 Fraction reduction
29 Nautical bell
29 Numbers whose count of divisors is prime
29 Order by pair comparisons
29 Own digits power sum
29 Paraffins
29 Prime words
29 Pseudo-random numbers/PCG32
29 Safe addition
29 Sequence of primorial primes
29 Shortest common supersequence
29 Smallest power of 6 whose decimal expansion contains n
29 Solve a Holy Knight's tour
29 Sum of two adjacent numbers are primes
29 Thiele's interpolation formula
29 Total circles area
29 Two's complement
29 UPC
29 Ulam numbers
29 World Cup group stage
28 Abelian sandpile model/Identity
28 Base58Check encoding
28 Brilliant numbers
28 Cipolla's algorithm
28 Collect and sort square numbers in ascending order from three lists
28 Distributed programming
28 Elliptic curve arithmetic
28 Exponentiation with infix operators in (or operating on) the base
28 Function frequency
28 Honaker primes
28 Image convolution
28 Intersecting number wheels
28 K-means++ clustering
28 Matrix chain multiplication
28 Padovan sequence
28 Palindromic primes in base 16
28 Permutations/Rank of a permutation
28 Permuted multiples
28 Playfair cipher
28 Pseudo-random numbers/Splitmix64
28 Ramer-Douglas-Peucker line simplification
28 Rare numbers
28 Snake
28 Spelling of ordinal numbers
28 Welch's t-test
28 Yahoo! search interface
27 15 puzzle solver
27 Colorful numbers
27 Commatizing numbers
27 EKG sequence convergence
27 Elementary cellular automaton/Random number generator
27 File size distribution
27 Getting the number of decimal places
27 Kolakoski sequence
27 Kosaraju
27 Linux CPU utilization
27 Longest substrings without repeating characters
27 Lucky and even lucky numbers
27 Magic constant
27 Magic squares of singly even order
27 Make a backup file
27 Next special primes
27 Parse an IP Address
27 Primes whose first and last number is 3
27 Print itself
27 RCRPG
27 Reverse the gender of a string
27 Self numbers
27 Sierpinski curve
27 Simulate input/Keyboard
27 Wagstaff primes
26 ASCII art diagram converter
26 Assertions in design by contract
26 Cubic special primes
26 Cyclops numbers
26 Determine sentence type
26 Euclid-Mullin sequence
26 Hough transform
26 Idoneal numbers
26 List rooted trees
26 Markov chain text generator
26 Mastermind
26 Orbital elements
26 Padovan n-step number sequences
26 Primes which contain only one odd digit
26 Print debugging statement
26 Record sound
26 Soloway's recurring rainfall
26 Substring primes
26 Sum data type
26 The sieve of Sundaram
25 Compiler/code generator
25 Continued fraction/Arithmetic/G(matrix ng, continued fraction n1, continued fraction n2)
25 Goldbach's comet
25 Index finite lists of positive integers
25 Joystick position
25 Largest product in a grid
25 Levenshtein distance/Alignment
25 Median filter
25 Monads/Writer monad
25 Native shebang
25 Perceptron
25 Permutations with some identical elements
25 Pseudo-random numbers/Xorshift star
25 Reflection/Get source O
25 Riordan numbers
25 SOAP
25 Sine wave
25 Solve a Hopido puzzle
25 Solve a Numbrix puzzle
25 Sort primes from list to a list
25 Variable declaration reset
25 Vibrating rectangles
25 Wilson primes of order n
25 Zeckendorf arithmetic
24 Active Directory/Search for a user
24 Addition chains
24 Air mass
24 Bilinear interpolation
24 Compiler/syntax analyzer
24 Composite numbers k with no single digit factors whose factors are all substrings of k
24 Create an object/Native demonstration O
24 Decorate-sort-undecorate idiom
24 Find duplicate files
24 Hex words
24 Largest difference between adjacent primes
24 Main step of GOST 28147-89
24 Metallic ratios
24 N-body problem
24 Periodic table
24 Sequence: nth number with exactly n divisors
24 Sokoban
24 Solve triangle solitare puzzle
24 Special factorials
24 Untrusted environment
24 Vigenère cipher/Cryptanalysis
24 Wordle comparison
23 Achilles numbers
23 Conjugate a Latin verb
23 De Polignac numbers
23 Draw pixel 2
23 Elementary cellular automaton/Infinite length
23 Juggler sequence
23 K-d tree
23 Klarner-Rado sequence
23 Knuth's power tree
23 Latin Squares in reduced form
23 Line circle intersection
23 Matrix digital rain
23 Names to numbers
23 Nested templated data
23 Nonogram solver
23 Pancake numbers
23 Pandigital prime
23 Percolation/Site percolation
23 Pig the dice game/Player
23 Polynomial synthetic division
23 Safe and Sophie Germain primes
23 Singly-linked list/Element removal
23 Special pythagorean triplet
23 Sphenic numbers
23 Useless instructions
23 Vogel's approximation method
22 Anadromes
22 Arithmetic derivative
22 Bitcoin/public point to address
22 Blum integer
22 Camel case and snake case
22 Data Encryption Standard
22 Double Twin Primes
22 Eertree
22 Largest palindrome product
22 Logistic curve fitting in epidemiology
22 Meissel–Mertens constant
22 Minimum primes
22 Modified random distribution
22 Montgomery reduction
22 Ormiston pairs
22 Peaceful chess queen armies
22 Percolation/Mean cluster density
22 Practical numbers
22 Primes - allocate descendants to their ancestors
22 Pseudo-random numbers/Combined recursive generator MRG32k3a
22 Quoting constructs
22 Selective file copy
22 Separate the house number from the street name
22 Simulate input/Mouse
22 Smallest numbers
22 Tarjan
22 Two bullet roulette
22 Window management
21 Arithmetic coding/As a generalized change of radix
21 Aspect oriented programming
21 Calmo numbers
21 Color quantization
21 Compare sorting algorithms' performance
21 Cyclotomic polynomial
21 Fortunate numbers
21 HTTPS/Client-authenticated
21 Imaginary base numbers
21 Jaro-Winkler distance
21 Just in time processing on a character stream
21 Long stairs
21 Nimber arithmetic
21 Prime numbers p for which the sum of primes less than or equal to p is prime
21 Readline interface
21 Transportation problem
21 Word ladder
20 Bitmap/Read an image through a pipe
20 Compiler/AST interpreter
20 Erdős-Nicolas numbers
20 Most frequent k chars distance
20 P-value correction
20 Prime triangle
20 Pseudorandom number generator image
20 Radical of an integer
20 Ruth-Aaron numbers
20 SQL-based authentication
20 Safe mode
20 Self-hosting compiler
20 Sierpinski square curve
20 Square root by hand
20 Terminal control/Positional read
20 Tree from nesting levels
20 Ultra useful primes
20 XML validation
19 Bitmap/PPM conversion through a pipe
19 CalmoSoft primes
19 Chernick's Carmichael numbers
19 Code segment unload
19 Distribution of 0 digits in factorial series
19 Execute Computer/Zero
19 Find URI in text
19 Free polyominoes enumeration
19 Gradient descent
19 Iccanobif primes
19 Inconsummate numbers in base 10
19 Minimal steps down to 1
19 O'Halloran numbers
19 OpenWebNet password
19 Pell numbers
19 Penrose tiling
19 Percolation/Bond percolation
19 Proof O
19 Repunit primes
19 Retrieve and search chat history
19 Rhonda numbers
19 Round-robin tournament schedule
19 SHA-256 Merkle tree
19 Set right-adjacent bits
19 Simulated annealing
19 VList
18 Banker's algorithm
18 Binary coded decimal
18 Bioinformatics/Subsequence
18 Equal prime and composite sums
18 Longest palindromic substrings
18 Minkowski question-mark function
18 NYSIIS
18 Non-transitive dice
18 Numbers which are not the sum of distinct squares
18 Particle swarm optimization
18 Polynomial derivative
18 Ramanujan's constant
18 Rendezvous O
18 SEND + MORE = MONEY
18 Suffix tree
18 Three word location
18 Word search
18 XXXX redacted
17 Bifid cipher
17 Bézier curves/Intersections
17 Canny edge detector
17 Curve that touches three points
17 Earliest difference between prime gaps
17 Extreme primes
17 Forbidden numbers
17 Four is the number of letters in the ...
17 Geohash
17 Geometric algebra
17 Gotchas
17 Iterators
17 Multiplicatively perfect numbers
17 Ormiston triples
17 Overloaded operators
17 Pairs with common factors
17 Pentomino tiling
17 Pisano period
17 Rodrigues’ rotation formula
17 Sorting algorithms/Tree sort on a linked list
17 Steffensen's method
17 Sub-unit squares
17 Topological sort/Extracted top item
17 Tropical algebra overloading
17 Upside-down numbers
17 War card game
17 Wolstenholme numbers
16 Bernstein basis polynomials
16 Count the coins/0-1
16 Even numbers which cannot be expressed as the sum of two twin primes
16 Faces from a mesh
16 Find Chess960 starting position identifier
16 Functional coverage tree
16 Home primes
16 Interactive help
16 Isograms and heterograms
16 Jaccard index
16 Jordan-Pólya numbers
16 Multi-base primes
16 Railway circuit
16 Run as a daemon or service
16 Sisyphus sequence
16 Solve hanging lantern problem
16 Square form factorization
16 Tetris
16 Text completion
16 Unit testing
16 Untouchable numbers
16 Verhoeff algorithm
15 ADFGVX cipher
15 ASCII control characters
15 Boyer-Moore string search
15 Distance and Bearing
15 Erdös-Selfridge categorization of primes
15 Factorial base numbers indexing permutations of a collection
15 Graph colouring
15 Mayan calendar
15 One-time pad
15 Penta-power prime seeds
15 Search in paragraph's text
15 Simple turtle graphics
15 Triangular numbers
14 Anaprimes
14 Audio frequency generator O
14 Binomial transform
14 Centroid of a set of N-dimensional points
14 Checksumcolor
14 Colour pinstripe/Printer
14 Deconvolution/2D+
14 Display an outline as a nested table
14 Fibonacci matrix-exponentiation
14 Gaussian primes
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 Magic numbers
14 N-grams
14 Penholodigital squares
14 Powerful numbers
14 Prime numbers whose neighboring pairs are tetraprimes
14 Primes: n*2^m+1
14 Quad-power prime seeds
14 Rainbow
14 Ramanujan primes
14 Sieve of Pritchard
14 Time-based one-time password algorithm
14 Using a speech engine to highlight words
13 16 puzzle game
13 Bioinformatics/Global alignment
13 Catmull–Clark subdivision surface
13 Countdown
13 Execute CopyPasta Language
13 Inventory sequence
13 Pan base non-primes
13 Set, the card game
13 Singular value decomposition
13 Spoof game
13 Tree datastructures
13 Wordiff
13 Zsigmondy numbers
12 CORDIC
12 Combinations with repetitions/Square digit chain
12 Distinct palindromes within decimal numbers
12 Elliptic Curve Digital Signature Algorithm
12 External sort
12 Fermat pseudoprimes
12 French Republican calendar
12 Morpion solitaire
12 One-two primes
12 Peripheral drift illusion
12 Pinstripe/Printer
12 Prime reciprocal sum
12 Ramanujan primes/twins
12 Range modifications
12 Resistance calculator
12 Rosetta Code/Rank languages by number of users
12 Rosetta Code/Tasks without examples
12 Smarandache-Wellin primes
12 Solve equations with substitution method
12 Starting a web browser
12 Suffixation of decimal numbers
12 Super-Poulet numbers
12 Terminal control/Restricted width positional input/No wrapping
11 Addition-chain exponentiation
11 Babylonian spiral
11 Brace expansion using ranges
11 Discrete Fourier transform
11 IPC via named pipe
11 N-queens minimum and knights and bishops
11 Numerical and alphabetical suffixes
11 OpenGL/Utah teapot
11 Parse EBNF
11 Sort an outline at every level
11 Statistics/Chi-squared distribution
11 Terminal control/Restricted width positional input/With wrapping
11 URL shortener
11 Wasteful, equidigital and frugal numbers
10 Compiler/Verifying syntax
10 Integer long division
10 Price list behind API
10 Raster bars
10 Resistance network calculator
10 Robots
10 Singly-linked list/Reversal
10 Smallest number k such that k+2^m is composite for all m less than k
10 Tamagotchi emulator
10 Text to HTML
10 Transliterate English text using the Greek alphabet
10 Tupper's self-referential formula
10 User defined pipe and redirection operators
10 Worthwhile task shaving
9 Apéry's constant
9 B-spline
9 Black box
9 Boustrophedon transform
9 Check if two polygons overlap
9 Doubly-linked list/Element removal
9 Engel expansion
9 Factor-perfect numbers
9 Fibonacci heap
9 I'm a software engineer, get me out of here
9 Least m such that n! + m is prime
9 Marching squares
9 Multidimensional Newton-Raphson method
9 Numbers k such that the last letter of k is the same as the first letter of k+1
9 OpenGL pixel shader
9 Random sentence from book
9 Rosetta Code/Run examples
9 Sealed classes and methods
9 Segmentation fault protection
9 Smallest enclosing circle problem
9 Undulating numbers
9 Walsh matrix
8 Audio overlap loop
8 Check if a polygon overlaps with a rectangle
8 Dating agency
8 Eisenstein primes
8 Hexapawn
8 Horse racing
8 Inner classes
8 JSON pointer
8 P-Adic numbers, basic
8 Particle fountain
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 Sorensen–Dice coefficient
8 Strassen's algorithm
8 Waveform analysis/Doh ray me O 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 Cycles of a permutation
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 Selection bias in clinical sciences
7 Solve a Rubik's cube
7 Wave function collapse
6 Consistent overhead byte stuffing
6 Convert CSV records to TSV
6 Create your own text control codes
6 Divide a rectangle into a number of unequal triangles
6 Lagrange Interpolation
6 OLE automation O O
6 P-Adic square roots
6 Posit numbers/encoding
6 Rosetta Code/List authors of task descriptions
6 Use a REST API
6 Vidir
6 Visitor pattern
5 CLI-based maze-game
5 Diophantine linear system solving
5 Erdős–Woods numbers
5 Generalised floating point multiplication
5 Multiton
5 Number triplets game
5 Posit numbers/decoding
5 Rice coding
5 Solving coin problems
5 Szymański's algorithm
5 Ukkonen’s suffix tree construction
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 Sanitize user input
4 Uno (card game)
4 WebGL rotating F
3 3d turtle graphics
3 Elevator simulation