Rosetta Code/Count examples/Full list/Tier 4

Revision as of 20:58, 4 December 2022 by Thundergnat (talk | contribs) (Update full list output)

Fourth tier of languages sorted by number of examples completed.

See Rosetta_Code/Rank_languages_by_popularity/Full_list for a full language/task completion table.

Top tier Second tier Third tier Fourth tier
Fourth ten programming languages by number of task examples completed:
    ㉛ Lua           ㉜ ALGOL_68      ㉝ PicoLisp      ㉞ F_Sharp       ㉟ AutoHotkey   
    ㊱ Ring          ㊲ JavaScript    ㊳ Common_Lisp   ㊴ AWK           ㊵ PureBasic    
As of 2022-12-04T20:56:17Z :: Tasks: 1202 :: Draft Tasks:389 :: Total Tasks: 1591 :: Total Examples: 88765
Count Task
543 Hello world/Text
360 99 bottles of beer
350 FizzBuzz
335 100 doors
314 Fibonacci sequence
297 Comments
284 Factorial
283 A+B
280 Empty program
246 Loops/Infinite
240 Arrays
238 Ackermann function
238 Reverse a string
235 Function definition
232 Loops/For
223 Conditional structures
223 Loops/While
209 Greatest element of a list
208 Arithmetic/Integer
208 Array concatenation
197 Repeat a string
196 Integer comparison
195 Greatest common divisor
194 Increment a numerical string
193 Averages/Arithmetic mean
192 Even or odd
192 Sieve of Eratosthenes
188 Hello world/Graphical
187 Array length
187 Copy a string
183 Binary digits
183 String concatenation
182 Boolean values
182 Loops/Downward for
180 Towers of Hanoi
179 Character codes
179 Sum and product of an array
178 Apply a callback to an array
177 Hello world/Newline omission
176 Integer sequence
176 Rot-13
175 Generic swap
175 String length
174 Empty string
174 Tokenize a string
173 Loops/Do-while
172 Loops/For with a specified step
172 Loops/N plus one half
172 Palindrome detection
171 Loops/Foreach
169 Loops/Break
169 String case
168 Sum of a series
167 Dot product
167 Logical operations
167 Quine
164 Sum of squares
162 Hailstone sequence
160 Associative array/Creation
160 Filter
156 Remove duplicate elements
156 Sort an integer array
154 Caesar cipher
154 Execute a system command
153 Loop over multiple arrays simultaneously
153 System time
152 Luhn test of credit card numbers
152 Sorting algorithms/Quicksort
151 Higher-order functions
151 Leap year
150 Stack
149 Determine if a string is numeric
149 Generate lower case ASCII alphabet
149 Guess the number
148 Command-line arguments
148 Primality by trial division
147 Factors of an integer
147 User input/Text
146 Day of the week
146 Substring
146 Zero to the zero power
144 Bitwise operations
144 Read entire file
143 Check that file exists
143 Create a file
143 Hello world/Standard error
143 Sorting algorithms/Bubble sort
142 Least common multiple
142 Loops/Continue
142 Mutual recursion
140 Roman numerals/Encode
139 ABC problem
139 Balanced brackets
138 Sleep
137 File input/output
137 Variables
136 Ethiopian multiplication
136 Literals/String
136 Pascal's triangle
135 Date format
135 Program termination
134 Count in octal
134 Flatten a list
134 Happy numbers
132 Compound data type
132 Include a file O
132 Roman numerals/Decode
131 Knuth shuffle
131 Literals/Integer
130 Function composition
130 Mandelbrot set
129 N-queens problem
128 Count occurrences of a substring
128 Loops/Nested
128 Null object
127 Pick random element
127 Read a file line by line
127 Real constants and functions
127 String matching
126 Anagrams
126 Associative array/Iteration
126 Detect division by zero O
126 Letter frequency
126 Matrix transposition
126 Sorting algorithms/Insertion sort
125 Align columns
125 Averages/Root mean square
125 Strip a set of characters from a string
124 Case-sensitivity of identifiers
124 Return multiple values
123 Binary search
123 Guess the number/With feedback
123 Hash from two arrays
123 Matrix multiplication
122 Conway's Game of Life
122 Haversine formula
122 Identity matrix
121 Babbage problem
121 Delete a file
121 Environment variables
121 Input loop
121 Look-and-say sequence
121 Permutations
120 Assertions
120 Averages/Median
120 Classes O
120 File size
120 Perfect numbers
120 String interpolation (included)
119 Call a function
119 Find limit of recursion
118 Sierpinski triangle
117 Catalan numbers
116 HTTP
116 Pangram checker
116 String append
115 Arithmetic/Complex
115 Infinity
115 Temperature conversion
114 Hostname
114 Multiplication tables
114 Rename a file
114 Search a list
114 Variadic function
113 Anonymous recursion O
113 Bulls and cows
113 Harshad or Niven series
113 Horner's rule for polynomial evaluation
113 Levenshtein distance
113 Reverse words in a string
113 Substring/Top and tail
112 Evaluate binomial coefficients
112 Formatted numeric output
112 Run-length encoding
112 Strip whitespace from a string/Top and tail
111 Accumulator factory
111 Arithmetic-geometric mean
111 Ordered words
110 Comma quibbling
110 Program name
110 Sum multiples of 3 and 5
110 The Twelve Days of Christmas
109 Averages/Pythagorean means
109 Create a two-dimensional array at runtime
109 N'th
108 Exceptions
108 Sorting algorithms/Merge sort
108 Zig-zag matrix
107 Prime decomposition
107 Queue/Definition
107 Random numbers
107 String prepend
107 Trigonometric functions
107 Vector products
106 Combinations
106 Digital root
106 Middle three digits
106 Sum digits of an integer
105 Arbitrary-precision integers (included) O O
105 Enumerations
105 Regular expressions
105 Sequence of non-squares
105 Sorting algorithms/Selection sort
104 24 game
104 Calculating the value of e
103 Amicable pairs
103 Shell one-liner O
102 Abundant, deficient and perfect number classifications
102 Power set
102 Short-circuit evaluation
102 Walk a directory/Non-recursively O
101 Evolutionary algorithm
101 Execute Brain****
101 Sorting algorithms/Gnome sort
100 Almost prime
100 Collections
100 Range extraction
100 Time a function
100 Y combinator O
99 Create an HTML table
99 Range expansion
98 Interactive programming (repl) O O O
98 MD5
98 Sort using a custom comparator
98 Symmetric difference
97 Averages/Mode
97 Exponentiation operator
97 Hello world/Newbie
97 Map range
97 Nth root
97 One-dimensional cellular automata
97 Random number generator (included)
97 Sorting algorithms/Cocktail sort
97 String comparison
96 Hofstadter Q sequence
96 Langton's ant
96 Sorting algorithms/Heapsort
95 First-class functions O O
95 Hamming numbers
95 Monty Hall problem
95 Number reversal game
94 Entropy
94 Inheritance/Single O O
94 Number names
94 Sierpinski carpet
93 Averages/Simple moving average
93 Catamorphism
93 Forward difference
93 Gray code
93 JSON
93 Price fraction
93 Sorting algorithms/Bogosort
93 Tree traversal
92 Address of a variable O O
92 CSV data manipulation
92 Cumulative standard deviation
92 Last Friday of each month
92 Show ASCII table
92 Simple windowed application O
92 Split a character string based on change of character
91 Abstract type O O O
91 Compare a list of strings
91 Menu
91 Terminal control/Clear the screen
90 Five weekends
90 Greatest subsequential sum
90 Josephus problem
90 Repeat
89 Box the compass
89 Floyd's triangle
89 URL decoding
89 Window creation
88 CSV to HTML translation
88 Count in factors
88 Literals/Floating point
88 Set
88 Sort an array of composite structures
87 Find the last Sunday of each month
87 Hello world/Line printer
87 Non-decimal radices/Convert
87 Proper divisors
87 Queue/Usage
87 Walk a directory/Recursively
86 Department numbers
86 Here document
86 Modular inverse
86 Munchausen numbers
86 Order two numerical lists
86 SEDOLs
86 Top rank per group
86 URL encoding
86 Word wrap
85 Bitmap O
85 Operator precedence
85 Playing cards
85 Read a specific line from a file
85 Singly-linked list/Traversal
85 Sorting algorithms/Shell sort
85 Strip comments from a string
84 CRC-32
84 Closures/Value capture O
84 Count the coins
84 Extend your language O
84 File modification time
84 Find common directory path
84 Find the missing permutation
84 Jump anywhere O O
83 Concurrent computing O
83 Introspection
83 Knapsack problem/0-1
83 Lucas-Lehmer test
83 Population count
83 Pythagorean triples
83 Spiral matrix
83 Terminal control/Ringing the terminal bell
82 Anti-primes
82 Kaprekar numbers
82 Long multiplication
82 Multifactorial
82 Show the epoch O
82 Sockets
82 Sorting algorithms/Counting sort
81 Anagrams/Deranged anagrams
81 Animation O
81 Call a foreign-language function
81 Dragon curve O
81 Dynamic variable names O O
81 Fibonacci n-step number sequences
81 Man or boy test
81 Priority queue
81 Soundex
81 Web scraping
80 100 prisoners
80 15 puzzle game
80 Angle difference between two bearings
80 Call an object method O
80 Empty directory
80 Keyboard input/Obtain a Y or N response
80 Linear congruential generator
80 Magic squares of odd order
80 Monte Carlo methods
80 Pi
80 Rock-paper-scissors
80 Sorting algorithms/Comb sort
80 Special characters
80 Take notes on the command line
80 XML/Input
79 Convert seconds to compound duration
79 Date manipulation
79 Equilibrium index
79 Gamma function
79 Jensen's Device
79 Old lady swallowed a fly
79 Parsing/RPN calculator algorithm
79 Phrase reversals
79 SHA-1
79 Semordnilap
79 Singly-linked list/Element definition
79 Thue-Morse
79 Unicode variable names O
79 Write entire file
78 Execute HQ9+
78 Guess the number/With feedback (player)
78 Hello world/Web server
78 List comprehensions
78 Sort disjoint sublist
78 Sudoku
78 Zeckendorf number representation
77 Averages/Mean angle
77 Calendar
77 Non-decimal radices/Output
77 Read a configuration file
77 Rep-string
77 Vigenère cipher
76 Combinations with repetitions
76 Currying
76 Enforced immutability O
76 Euler's sum of powers conjecture
76 Flow-control structures
76 Quaternion type
76 SHA-256
76 Write float arrays to a text file
75 AKS test for primes
75 Additive primes
75 Benford's law
75 Draw a sphere
75 Four bit adder
75 Multiple distinct objects
75 Pernicious numbers
75 Sort three variables
75 Unix/ls
74 Attractive numbers
74 Damm algorithm
74 Fractal tree
74 Jewels and stones
74 Largest int from concatenated ints
74 Roots of unity
74 Special variables
74 Stair-climbing puzzle
73 Barnsley fern
73 Bitmap/Bresenham's line algorithm O
73 Constrained random points on a circle
73 Exceptions/Catch an exception thrown in a nested call
73 General FizzBuzz
73 I before E except after C
73 Longest common subsequence
73 Sequence of primes by trial division
73 Van der Corput sequence
72 Arithmetic/Rational
72 Chinese remainder theorem
72 Fast Fourier transform
72 Horizontal sundial calculations
72 IBAN
72 Maze generation
72 Named parameters O
72 Sorting algorithms/Stooge sort
72 Yin and yang
71 Amb
71 Catalan numbers/Pascal's triangle
71 Closest-pair problem
71 Exponentiation order
71 Fork O O
71 Get system command output
71 Nested function
71 Numerical integration
71 Polymorphism
71 Probabilistic choice
71 Runtime evaluation O
71 Self-describing numbers
71 Sorting algorithms/Pancake sort
71 Square but not cube
71 Strip control codes and extended characters from a string
71 Text processing/Max licenses in use
71 Trabb Pardo–Knuth algorithm
71 Variable size/Get O O
70 Host introspection O
70 Morse code
70 Singly-linked list/Element insertion
70 Stern-Brocot sequence
70 Tic-tac-toe
70 Van Eck sequence
70 Word frequency
69 Abundant odd numbers
69 Binary strings
69 Euler method
69 Memory allocation O O
69 One of n lines in a file
69 RPG attributes generator
69 Semiprime
68 Best shuffle
68 Circles of given radius through two points
68 Continued fraction
68 Extract file extension
68 ISBN13 check digit
68 Narcissistic decimal number
68 Remove lines from a file
68 Roots of a function
68 Sort stability
68 Sorting algorithms/Sleep sort
68 Write language name in 3D ASCII
67 9 billion names of God the integer
67 Animate a pendulum
67 CUSIP
67 Determine if a string is collapsible
67 Documentation
67 Factors of a Mersenne number
67 Gapful numbers
67 Integer overflow
67 Isqrt (integer square root) of X
67 McNuggets problem
67 Optional parameters
67 Plot coordinate pairs
67 Reduced row echelon form
67 Roots of a quadratic function
67 Undefined values
67 XML/Output
66 4-rings or 4-squares puzzle
66 Cholesky decomposition
66 Dutch national flag problem
66 HTTPS
66 Hofstadter-Conway $10,000 sequence
66 Inheritance/Multiple O O
66 Magic 8-ball
66 Modular exponentiation
66 Subleq
66 Two sum
65 Compile-time calculation O O O
65 Draw a clock
65 Globally replace text in several files
65 Knight's tour
65 Mouse position O
65 Non-decimal radices/Input
65 Runge-Kutta method
65 Terminal control/Display an extended character
65 Test a function
64 Averages/Mean time of day
64 Base64 decode data
64 Bitmap/Write a PPM file
64 Cartesian product of two or more lists
64 Chinese zodiac
64 Determine if a string has all the same characters
64 Knapsack problem/Continuous
64 Leonardo numbers
64 Long year
64 Ludic numbers
64 Miller–Rabin primality test
64 Quickselect algorithm
64 Smith numbers
63 24 game/Solve
63 Arithmetic evaluation
63 Base64 encode data
63 Copy stdin to stdout
63 DNS query
63 Draw a pixel
63 Emirp primes
63 Generator/Exponential
63 Huffman coding
63 JortSort
63 Longest common prefix
63 Partial function application
63 Two identical strings
62 2048
62 Draw a cuboid
62 Knapsack problem/Unbounded
62 Mad Libs
62 Pascal matrix generation
62 Ternary logic
62 Truncatable primes
61 Add a variable to a class instance at runtime O O O O
61 Brownian tree
61 Cantor set
61 Define a primitive data type O
61 Kernighans large earthquake problem
61 Remove vowels from a string
61 Sattolo cycle
61 Scope modifiers O
61 Sorting algorithms/Bead sort
61 Tau function
61 Topological sort
61 Truncate a file
61 Unicode strings
61 User input/Graphical O
61 Vector
60 Dijkstra's algorithm
60 FASTA format
60 Fibonacci word
60 Grayscale image O
60 LZW compression
60 Left factorials
60 Matrix-exponentiation operator
60 Nim game
60 Random number generator (device)
60 Singleton O
60 Stem-and-leaf plot
60 Terminal control/Coloured text
59 Deal cards for FreeCell
59 Doubly-linked list/Element definition
59 Hash join
59 Keyboard input/Keypress check
59 Multisplit
59 Odd word problem
59 Pointers and references O
59 Tokenize a string with escaping
59 Universal Turing machine
58 Associative array/Merging
58 Bernoulli numbers
58 Call a function in a shared library
58 Delegates O
58 Dinesman's multiple-dwelling problem
58 Discordian date
58 Farey sequence
58 Forest fire
58 Fusc sequence
58 Iterated digits squaring
58 Longest common substring
58 Maximum triangle path sum
58 Perfect shuffle
58 Sorting algorithms/Permutation sort
58 Unbias a random generator
57 Abbreviations, automatic
57 Chaos game
57 Convert decimal number to rational
57 Handle a signal
57 Inverted syntax O O O
57 Largest proper divisor of n
57 Loops/Increment loop index within loop body
57 Loops/With multiple ranges
57 Primality by Wilson's theorem
57 Rosetta Code/Rank languages by popularity
57 Runtime evaluation/In an environment
57 Sum of first n cubes
57 Words containing "the" substring
56 Determine if a string has all unique characters
56 Extreme floating point values
56 First-class functions/Use numbers analogously O O
56 Modulinos
56 Naming conventions
56 Password generator
56 Perfect totient numbers
56 Pig the dice game
56 Sort numbers lexicographically
56 Stack traces O
56 Statistics/Basic
56 Sum of divisors
56 Validate International Securities Identification Number
56 XML/XPath
55 Archimedean spiral
55 Bell numbers
55 Find the intersection of two lines
55 Greyscale bars/Display
55 Non-continuous subsequences
55 Search a list of records
55 Send email O
55 Seven-sided dice from five-sided dice
55 Shoelace formula for polygonal area
55 Strip block comments
55 Synchronous concurrency O
55 Tau number
55 Terminal control/Cursor positioning
55 Water collected between towers
55 XML/DOM serialization
54 Days between dates
54 Holidays related to Easter
54 Longest increasing subsequence
54 Move-to-front algorithm
54 Polynomial regression
54 Rate counter
54 Recaman's sequence
54 Text processing/2
54 Wireworld
53 Determine if a string is squeezable
53 Dining philosophers
53 Doubly-linked list/Element insertion
53 Egyptian division
53 Fractran
53 Gaussian elimination
53 Heronian triangles
53 Hofstadter Figure-Figure sequences
53 Jaro similarity
53 Kronecker product
53 Longest string challenge
53 Make directory path
53 Sierpinski triangle/Graphical
53 Strange plus numbers
53 Zebra puzzle
52 Average loop length
52 Convex hull
52 Determinant and permanent
52 Doubly-linked list/Traversal
52 Execute a Markov algorithm
52 Extensible prime generator
52 GUI component interaction O
52 Metaprogramming O O
52 Text processing/1
51 Aliquot sequence classifications
51 Append a record to the end of a text file
51 Halt and catch fire
51 Musical scale
51 Respond to an unknown method call O O O
51 Text between
50 ABC words
50 Bioinformatics/base count
50 Bitmap/Flood fill O
50 Colour bars/Display
50 Digital root/Multiplicative digital root
50 Echo server
50 Elementary cellular automaton
50 Floyd-Warshall algorithm
50 Last letter-first letter
50 Mertens function
50 Polymorphic copy O O
50 Sparkline in unicode
50 Stable marriage problem
50 Taxicab numbers
50 Totient function
50 Visualize a tree
49 21 game
49 Abbreviations, easy
49 Chowla numbers
49 Colour pinstripe/Display O
49 Doubly-linked list/Definition
49 Element-wise operations
49 Generate Chess960 starting position
49 Hilbert curve
49 History variables O
49 Image noise O
49 MAC vendor lookup
49 Munching squares
49 OpenGL O
49 Polynomial long division
49 Send an unknown method call
49 Smallest square that begins with n
49 Sorting algorithms/Radix sort
49 Spinning rod animation/Text
49 The Name Game
49 Ulam spiral (for primes)
49 Verify distribution uniformity/Naive
48 Active object O
48 Approximate equality
48 Determine if only one instance is running
48 GUI/Maximum window dimensions O
48 Numbers divisible by their individual digits, but not by the product of their digits.
48 Set consolidation
48 Start from a main routine O
48 Sum of the digits of n is substring of n
48 Variable size/Set O O
47 Bitmap/Midpoint circle algorithm O
47 Bitmap/Read a PPM file O
47 Casting out nines
47 Color of a screen pixel O
47 Currency
47 Deepcopy
47 Knapsack problem/Bounded
47 Narcissist
47 Permutations/Derangements
47 Problem of Apollonius
47 Speech synthesis
47 Sum to 100
47 UTF-8 encode and decode
46 Abbreviations, simple
46 Bulls and cows/Player
46 Compiler/lexical analyzer
46 Fivenum
46 Flipping bits game
46 Keyboard input/Flush the keyboard buffer
46 Loops/Wrong ranges
46 Parsing/Shunting-yard algorithm
46 Permutations by swapping
46 Rosetta Code/Count examples
46 Sorting Algorithms/Circle Sort
46 Substitution cipher
46 Subtractive generator
46 Sutherland-Hodgman polygon clipping
46 Terminal control/Dimensions
46 Twelve statements
45 Atomic updates O O
45 Base 16 numbers needing a to f
45 Brazilian numbers
45 Carmichael 3 strong pseudoprimes
45 Compare length of two strings
45 Find words which contains more than 3 e vowels
45 MD5/Implementation
45 Read a file character by character/UTF8 O
45 Sailors, coconuts and a monkey problem
45 Secure temporary file
45 Sort a list of object identifiers
45 Sorting algorithms/Patience sort
45 Strange numbers
45 Truth table
45 Type detection
44 Balanced ternary
44 Brace expansion
44 Coprimes
44 Cycle detection
44 File extension is in extensions list
44 Hickerson series of almost integers
44 Humble numbers
44 Idiomatically determine all the lowercase and uppercase letters
44 Input/Output for pairs of numbers
44 Julia set
44 Largest number divisible by its digits
44 Long primes
44 Pascal's triangle/Puzzle
44 Percentage difference between images O
44 Primorial numbers
44 Ranking methods
44 S-expressions
44 Special divisors
44 Summarize and say sequence
44 Voronoi diagram
44 Yellowstone sequence
43 Calendar - for "REAL" programmers
43 Combinations and permutations
43 Cramer's rule
43 Disarium numbers
43 Euler's identity
43 Feigenbaum constant calculation
43 GUI enabling/disabling of controls O
43 Input/Output for lines of text
43 Inverted index
43 Lah numbers
43 Prime conspiracy
43 Product of divisors
43 Pythagorean quadruples
43 Safe primes and unsafe primes
43 Sequence: smallest number with exactly n divisors
43 Table creation/Postal addresses
43 Terminal control/Inverse video
42 Count how many vowels and consonants occur in a string
42 Factorions
42 Find the intersection of a line with a plane
42 Find words which contains all the vowels
42 Four is magic
42 Function prototype O O O
42 Kahan summation
42 Magic squares of doubly even order
42 Nice primes
42 Palindrome dates
42 Parallel calculations O O
42 Penney's game
42 Permutations with repetitions
42 Scope/Function names and labels
42 Statistics/Normal distribution
42 Topswops
42 Triplet of three numbers
42 Variable-length quantity
41 Bitwise IO O
41 Cheryl's birthday
41 Create a file on magnetic tape O
41 Display a linear combination
41 Integer roots
41 Knuth's algorithm S
41 Maze solving
41 Metered concurrency
41 Parametric polymorphism O
41 Permutation test
41 Primes whose sum of digits is 25
41 Ray-casting algorithm
41 Rosetta Code/Find bare lang tags
41 Sorting algorithms/Strand sort
41 Terminal control/Hiding the cursor
41 Unique characters
41 Vampire number
40 Break OO privacy O
40 Cousin primes
40 Cuban primes
40 Dice game probabilities
40 Extra primes
40 Fibonacci word/fractal
40 Find palindromic numbers in both binary and ternary bases
40 Find prime numbers of the form n*n*n+2
40 Frobenius numbers
40 Koch curve
40 LU decomposition
40 Lychrel numbers
40 Matrix with two diagonals
40 Multiple regression
40 Pathological floating point problems
40 Pentagram
40 Pythagoras tree
40 QR decomposition
40 Sequence: smallest number greater than previous term with exactly n divisors
40 Shift list elements to left by 3
40 Solve the no connection puzzle
40 Test integerness
39 Apply a digital filter (direct form II transposed)
39 Arithmetic-geometric mean/Calculate Pi
39 Check output device is a terminal
39 Church numerals
39 Constrained genericity O O O
39 Digit fifth powers
39 Events
39 Find prime n such that reversed n is also prime
39 Implicit type conversion
39 Mersenne primes
39 Metronome
39 Minesweeper game
39 Multi-dimensional array O
39 Mutex
39 Order disjoint list items
39 Parsing/RPN to infix conversion
39 Pinstripe/Display
39 Sort the letters of string in alphabetical order
39 Terminal control/Unicode output
38 Algebraic data types
38 Alternade words
38 Bitmap/Bézier curves/Cubic O
38 Change e letters to i in words
38 Continued fraction/Arithmetic/Construct from rational number
38 Create an object at a given address O O
38 Determine if two triangles overlap
38 Draw a rotating cube
38 Eban numbers
38 Entropy/Narcissist
38 Find words whose first and last three letters are equal
38 Find words with alternating vowels and consonants
38 Length of an arc between two angles
38 Longest common suffix
38 Machine code
38 Multiline shebang
38 Numerical integration/Gauss-Legendre Quadrature
38 Object serialization O O
38 Odd and square numbers
38 RSA code
38 Square-free integers
38 Strong and weak primes
38 Subset sum problem
38 Sum of elements below main diagonal of matrix
38 Zumkeller numbers
37 AVL tree
37 Bacon cipher
37 Chaocipher
37 Circular primes
37 Conjugate transpose
37 Diversity prediction theorem
37 MD4
37 Negative base numbers
37 Numbers which binary and ternary digit sum are prime
37 Old Russian measure of length
37 Ordered partitions
37 RIPEMD-160
37 Smarandache prime-digital sequence
37 Successive prime differences
37 Word wheel
36 Egyptian fractions
36 Faulhaber's triangle
36 First power of 2 that has leading decimal digits of 12
36 Gauss-Jordan matrix inversion
36 Minimum number of cells after, before, above and below NxN squares
36 Modular arithmetic
36 Numbers with equal rises and falls
36 Parameterized SQL statement
36 Pell's equation
36 Perlin noise
36 Poker hand analyser
36 Polyspiral
36 Terminal control/Preserve screen
36 Twin primes
36 URL parser
35 10001th prime
35 Angles (geometric), normalization and conversion
35 Ascending primes
35 Bitmap/Bézier curves/Quadratic O
35 Check input device is a terminal
35 Code Golf: Code Golf
35 Death Star O
35 Decimal floating point number to binary
35 FTP
35 Find first and last set bit of a long integer
35 Galton box animation
35 Minimum positive multiple in base 10 using only 0 and 1
35 Numbers in base-16 representation that cannot be written with decimal digits
35 Partition an integer x into n primes
35 Partition function P
35 Peano curve
35 Pseudo-random numbers/Middle-square method
35 Reflection/List properties
35 Rosetta Code/Find unimplemented tasks
35 Set puzzle
35 Sexy primes
35 Solve a Hidato puzzle
35 Sorting algorithms/Cycle sort
35 Superellipse
35 Textonyms
35 Topic variable
35 Use another language to call a function
35 Zhang-Suen thinning algorithm
34 Bitmap/Histogram O
34 Burrows–Wheeler transform
34 Calkin-Wilf sequence
34 Chebyshev coefficients
34 Color wheel
34 Esthetic numbers
34 Executable library
34 Find first missing positive
34 Find if a point is within a triangle
34 Jacobi symbol
34 Law of cosines - triples
34 Mian-Chowla sequence
34 Multiplicative order
34 Möbius function
34 Numbers with prime digits whose sum is 13
34 Parallel brute force
34 Parse command-line arguments
34 Simple database
34 Straddling checkerboard
34 Strange unique prime triplets
34 Terminal control/Cursor movement
34 Unprimeable numbers
34 Weird numbers
34 Wieferich primes
34 Word break problem
34 Write to Windows event log
34 Xiaolin Wu's line algorithm
33 Bin given limits
33 Bitcoin/address validation
33 Chat server O
33 Checkpoint synchronization
33 Chemical calculator
33 Common list elements
33 Decision tables
33 Fairshare between two and more
33 Find square difference
33 Long literals, with continuations
33 Mayan numerals
33 Numbers with same digit set in base 10 and base 16
33 Pierpont primes
33 Pragmatic directives O
33 Primes with digits in nondecreasing order
33 Range consolidation
33 Resistor mesh
33 Set of real numbers
33 Show the (decimal) value of a number of 1s appended with a 3, then squared
33 Summarize primes
33 Super-d numbers
33 Unique characters in each string
33 Words from neighbour ones
32 Canonicalize CIDR
32 Common sorted list
32 Deconvolution/1D
32 Doomsday rule
32 Execute SNUSP
32 Faulhaber's formula
32 Find words which contain the most consonants
32 Finite state machine
32 Generate random chess position
32 Generate random numbers without repeating a value
32 Go Fish
32 Keyboard macros
32 Memory layout of a data structure O O O
32 Minimum numbers of three lists
32 Nonoblock
32 Numeric error propagation
32 Rosetta Code/Fix code tags
32 Steady squares
32 Stirling numbers of the second kind
32 Sum and product puzzle
32 Verify distribution uniformity/Chi-squared test
32 Video display modes
32 Window creation/X11 O O O
31 A* search algorithm
31 Abelian sandpile model
31 Arena storage pool
31 Bioinformatics/Sequence mutation
31 Check Machin-like formulas
31 Compiler/virtual machine interpreter
31 First 9 prime Fibonacci number
31 First class environments
31 HTTPS/Authenticated
31 Hunt the Wumpus
31 Increasing gaps between consecutive Niven numbers
31 Magnanimous numbers
31 Plasma effect
31 Ramsey's theorem
31 Random Latin squares
31 State name puzzle
31 Stirling numbers of the first kind
31 Stream merge
31 Sylvester's sequence
31 The ISAAC cipher
31 Update a configuration file
30 Birthday problem
30 Day of the week of Christmas and New Year
30 De Bruijn sequences
30 Distinct power numbers
30 Fermat numbers
30 Find minimum number of coins that make a given value
30 Formal power series
30 Harmonic series
30 Honeycombs O
30 Kronecker product based fractals
30 Largest prime factor
30 Maximum difference between adjacent elements of list
30 Motzkin numbers
30 N-smooth numbers
30 Natural sorting
30 Numbers in base 10 that are palindromic in bases 2, 4, and 16
30 Product of min and max prime factors
30 Reflection/List methods
30 Sierpinski pentagon
30 Sorting algorithms/Cocktail sort with shifting bounds
30 Table creation
30 Teacup rim text
29 Active Directory/Connect O
29 Audio alarm
29 Biorhythms
29 Cut a rectangle
29 Find largest left truncatable prime in a given base
29 First perfect square in base n with n unique digits
29 Fixed length records
29 Fraction reduction
29 Largest five adjacent number
29 Merge and aggregate datasets
29 Monads/Maybe monad
29 Next highest int from digits
29 Odd words
29 Positive decimal integers with the digit 1 occurring exactly twice
29 Safe addition
29 Same fringe
29 Shortest common supersequence
29 Sleeping Beauty problem
29 Snake and ladder
29 Solve a Holy Knight's tour
29 Sunflower fractal
29 Superpermutation minimisation
29 Thiele's interpolation formula
29 World Cup group stage
28 Almkvist-Giullera formula for pi
28 Append numbers at same position in strings
28 Card shuffles
28 Changeable words
28 Cipolla's algorithm
28 Cistercian numerals
28 Coprime triplets
28 Distributed programming
28 Find squares n where n+1 is prime
28 Idiomatically determine all the characters that can be used for symbols
28 Image convolution
28 Intersecting number wheels
28 Last list item
28 Minimum multiple of m where digital sum equals m
28 Mosaic matrix
28 Nautical bell
28 Numeric separator syntax
28 Order by pair comparisons
28 Palindromic gapful numbers
28 Paraffins
28 Piprimes
28 Play recorded sounds
28 Playfair cipher
28 Pseudo-random numbers/PCG32
28 Reverse the order of lines in a text file while preserving the contents of each line
28 Sequence of primorial primes
28 Sierpinski arrowhead curve
28 Sudan function
28 Summation of primes
28 Tonelli-Shanks algorithm
28 Total circles area
28 UPC
28 Welch's t-test
28 Yahoo! search interface
27 Arithmetic numbers
27 Base58Check encoding
27 Elliptic curve arithmetic
27 Erdős-primes
27 Exactly three adjacent 3 in lists
27 Find adjacent primes which differ by a square integer
27 Function frequency
27 Kolakoski sequence
27 Legendre prime counting function
27 Linux CPU utilization
27 Make a backup file
27 Matrix chain multiplication
27 Mind boggling card trick
27 Monads/List monad
27 Neighbour primes
27 Parse an IP Address
27 Percolation/Mean run density
27 Permutations/Rank of a permutation
27 Prime numbers which contain 123
27 Prime words
27 RCRPG
27 Ramer-Douglas-Peucker line simplification
27 Self numbers
27 Simulate input/Keyboard
27 Sum of primes in odd positions is prime
27 Sum of square and cube digits of an integer are primes
26 Commatizing numbers
26 Consecutive primes with ascending or descending differences
26 Deming's funnel
26 Descending primes
26 Exponentiation with infix operators in (or operating on) the base
26 Hough transform
26 K-means++ clustering
26 Kosaraju
26 List rooted trees
26 Lucky and even lucky numbers
26 Magic squares of singly even order
26 Markov chain text generator
26 Orbital elements
26 Padovan sequence
26 Palindromic primes
26 Permuted multiples
26 Reverse the gender of a string
26 Snake
26 Special neighbor primes
26 Spelling of ordinal numbers
26 Ulam numbers
25 15 puzzle solver
25 ASCII art diagram converter
25 Abelian sandpile model/Identity
25 Assertions in design by contract
25 Compiler/code generator
25 Create an object/Native demonstration O O O
25 EKG sequence convergence
25 Elementary cellular automaton/Random number generator
25 File size distribution
25 Four sides of square
25 Index finite lists of positive integers
25 Joystick position O
25 Mastermind
25 Next special primes
25 Odd squarefree semiprimes
25 Palindromic primes in base 16
25 Prime triplets
25 Pseudo-random numbers/Xorshift star
25 Record sound O
25 Reflection/Get source
25 SOAP
25 Sine wave
25 Smallest multiple
25 Smallest power of 6 whose decimal expansion contains n
25 Solve a Hopido puzzle
25 Solve a Numbrix puzzle
25 Sum data type
24 Active Directory/Search for a user O
24 Addition chains
24 Bilinear interpolation
24 Compiler/syntax analyzer
24 Find duplicate files
24 Jacobsthal numbers
24 Levenshtein distance/Alignment
24 Longest substrings without repeating characters
24 Main step of GOST 28147-89
24 Native shebang
24 Perceptron
24 Print debugging statement
24 Pseudo-random numbers/Splitmix64
24 Quadrat special primes
24 Rare numbers
24 Sequence: nth number with exactly n divisors
24 Sokoban
24 Solve triangle solitare puzzle
24 The sieve of Sundaram
24 Untrusted environment
24 Vigenère cipher/Cryptanalysis
24 Zeckendorf arithmetic
23 Concatenate two primes is also prime
23 Knuth's power tree
23 Latin Squares in reduced form
23 Line circle intersection
23 Median filter
23 N-body problem
23 Names to numbers
23 Nested templated data
23 Nonogram solver
23 Numbers whose count of divisors is prime
23 Permutations with some identical elements
23 Pig the dice game/Player
23 Polynomial synthetic division
23 Sierpinski curve
23 Singly-linked list/Element removal
23 Substring primes
23 Useless instructions
23 Variable declaration reset
23 Vibrating rectangles
23 Vogel's approximation method
23 Wilson primes of order n
22 Bitcoin/public point to address
22 Cubic special primes
22 Cyclops numbers
22 Data Encryption Standard
22 Draw pixel 2
22 Eertree
22 Elementary cellular automaton/Infinite length
22 Getting the number of decimals
22 Matrix digital rain
22 Metallic ratios
22 Monads/Writer monad
22 Montgomery reduction
22 Peaceful chess queen armies
22 Primes whose first and last number is 3
22 Pseudo-random numbers/Combined recursive generator MRG32k3a
22 Selective file copy
22 Simulate input/Mouse O
22 Soloway's recurring rainfall
22 Special factorials
22 Window management O
21 Air mass
21 Arithmetic coding/As a generalized change of radix
21 Brilliant numbers
21 Cullen and Woodall numbers
21 Cyclotomic polynomial
21 Imaginary base numbers
21 Jaro-Winkler distance
21 Juggler sequence
21 Just in time processing on a character stream
21 K-d tree
21 Largest difference between adjacent primes
21 Nimber arithmetic
21 Own digits power sum
21 Padovan n-step number sequences
21 Pancake numbers
21 Percolation/Site percolation
21 Practical numbers
21 Primes - allocate descendants to their ancestors
21 Primes which contain only one odd digit
21 Readline interface
21 Selectively replace multiple instances of a character within a string
21 Separate the house number from the street name
21 Smallest numbers
21 Special pythagorean triplet
21 Transportation problem
21 Word ladder
20 Collect and sort square numbers in ascending order from three lists
20 Color quantization O
20 Compare sorting algorithms' performance
20 Compiler/AST interpreter
20 Euler's constant 0.5772...
20 Logistic curve fitting in epidemiology
20 Most frequent k chars distance
20 P-value correction
20 Percolation/Mean cluster density
20 Print itself
20 Quoting constructs
20 SQL-based authentication
20 Sierpinski square curve
20 Sort primes from list to a list
20 Terminal control/Positional read
20 Word search
20 Wordle comparison
19 Aspect oriented programming
19 Bitmap/Read an image through a pipe
19 Chernick's Carmichael numbers
19 Code segment unload O
19 Curzon numbers
19 Determine sentence type
19 Find URI in text
19 HTTPS/Client-authenticated
19 Largest palindrome product
19 Largest product in a grid
19 Long stairs
19 Magic constant
19 Minimum primes
19 Proof O O O O
19 SHA-256 Merkle tree
19 Self-hosting compiler
19 Simulated annealing
19 Square root by hand
19 Sum of two adjacent numbers are primes
19 Tarjan
19 Two bullet roulette
19 XML validation
18 Anadromes
18 Banker's algorithm
18 Bitmap/PPM conversion through a pipe
18 Deceptive numbers
18 Free polyominoes enumeration
18 Goldbach's comet
18 Longest palindromic substrings
18 Minimal steps down to 1
18 Modified random distribution
18 NYSIIS
18 Non-transitive dice
18 Numerical integration/Adaptive Simpson's method
18 Particle swarm optimization
18 Percolation/Bond percolation
18 Prime numbers p for which the sum of primes less than or equal to p is prime
18 Ramanujan's constant
18 Rendezvous O
18 Retrieve and search chat history
18 Safe and Sophie Germain primes
18 Safe mode
18 Suffix tree
18 Two's complement
18 VList
17 Achilles numbers
17 Bioinformatics/Subsequence
17 Canny edge detector
17 Colorful numbers
17 Conjugate a Latin verb
17 Fortunate numbers
17 Four is the number of letters in the ...
17 Geometric algebra
17 Idoneal numbers
17 Numbers which are the cube roots of the product of their proper divisors
17 Overloaded operators
17 Penrose tiling
17 Pseudorandom number generator image
17 Riordan numbers
17 Sorting algorithms/Tree sort on a linked list
17 Three word location
17 Topological sort/Extracted top item
16 Camel case and snake case
16 Distribution of 0 digits in factorial series
16 Giuga numbers
16 Hex words
16 Honaker primes
16 Interactive help
16 OpenWebNet password
16 Pandigital prime
16 Prime triangle
16 Rodrigues’ rotation formula
16 Run as a daemon or service
16 Text completion
16 Tree from nesting levels
15 Binary coded decimal
15 Composite numbers k with no single digit factors whose factors are all substrings of k
15 Continued fraction/Arithmetic/G(matrix ng, continued fraction n)
15 Curve that touches three points
15 Duffinian numbers
15 Earliest difference between prime gaps
15 Factorial base numbers indexing permutations of a collection
15 Functional coverage tree
15 Geohash
15 Gradient descent
15 Klarner-Rado sequence
15 Minkowski question-mark function
15 Multi-base primes
15 One-time pad
15 Pentomino tiling
15 Periodic table
15 Pisano period
15 Railway circuit
15 Rhonda numbers
15 Ruth-Aaron numbers
15 Tetris
15 Unit testing
15 Untouchable numbers
15 XXXX redacted
14 Audio frequency generator
14 Checksumcolor
14 Colour pinstripe/Printer O
14 De Polignac numbers
14 Deconvolution/2D+
14 Display an outline as a nested table
14 Equal prime and composite sums
14 Erdös-Selfridge categorization of primes
14 Generalised floating point addition
14 Gotchas
14 Greed
14 Hourglass puzzle
14 Launch rocket with countdown and acceleration in stdout
14 Set right-adjacent bits
14 Solve hanging lantern problem
14 Tropical algebra overloading
14 Using a speech engine to highlight words
14 Verhoeff algorithm
14 War card game
13 Arithmetic derivative
13 Catmull–Clark subdivision surface
13 Count the coins/0-1
13 Euclid-Mullin sequence
13 Even numbers which cannot be expressed as the sum of two twin primes
13 Execute CopyPasta Language
13 Faces from a mesh
13 Fibonacci matrix-exponentiation
13 Find Chess960 starting position identifier
13 Graph colouring
13 Home primes
13 Iterators
13 Meissel–Mertens constant
13 Polynomial derivative
13 Powerful numbers
13 Round-robin tournament schedule
13 Spoof game
13 Time-based one-time password algorithm
13 Wagstaff primes
12 16 puzzle game
12 ADFGVX cipher
12 Combinations with repetitions/Square digit chain
12 Distance and Bearing
12 Distinct palindromes within decimal numbers
12 External sort
12 Factorial primes
12 French Republican calendar
12 Gaussian primes
12 Inconsummate numbers in base 10
12 Jaccard index
12 Mayan calendar
12 Morpion solitaire
12 Pinstripe/Printer
12 Ramanujan primes
12 Range modifications
12 Repunit primes
12 Rosetta Code/Rank languages by number of users
12 Rosetta Code/Tasks without examples
12 Square form factorization
12 Starting a web browser
12 Suffixation of decimal numbers
12 Terminal control/Restricted width positional input/No wrapping
12 Tree datastructures
12 Wordiff
11 Bioinformatics/Global alignment
11 Brace expansion using ranges
11 Discrete Fourier transform
11 Execute Computer/Zero
11 IPC via named pipe
11 Numerical and alphabetical suffixes
11 OpenGL/Utah teapot
11 Pan base non-primes
11 Parse EBNF
11 Pell numbers
11 Primes: n*2^m+1
11 Resistance calculator
11 Simple turtle graphics
11 Sort an outline at every level
11 Terminal control/Restricted width positional input/With wrapping
11 URL shortener
11 Ultra useful primes
10 Addition-chain exponentiation
10 Countdown
10 Elliptic Curve Digital Signature Algorithm
10 Erdős-Nicolas numbers
10 Integer long division
10 N-queens minimum and knights and bishops
10 Numbers which are not the sum of distinct squares
10 O'Halloran numbers
10 Resistance network calculator
10 Robots
10 Sieve of Pritchard
10 Solve equations with substitution method
10 Tamagotchi emulator
10 Text to HTML
10 User defined pipe and redirection operators
10 Zsigmondy numbers
9 B-spline
9 Black box
9 Boyer-Moore string search
9 Compiler/Verifying syntax
9 Continued fraction/Arithmetic/G(matrix ng, continued fraction n1, continued fraction n2)
9 Doubly-linked list/Element removal
9 Fermat pseudoprimes
9 Fibonacci heap
9 Isograms and heterograms
9 Knuth-Morris-Pratt string search
9 Multidimensional Newton-Raphson method
9 OpenGL pixel shader
9 Price list behind API
9 Ramanujan primes/twins
9 Rosetta Code/Run examples
9 Search in paragraph's text
9 Smallest enclosing circle problem
9 Sub-unit squares
8 Audio overlap loop
8 Babylonian spiral
8 Dating agency
8 Hexapawn
8 Horse racing
8 I'm a software engineer, get me out of here
8 Marching squares
8 P-Adic numbers, basic
8 Pairs with common factors
8 Penta-power prime seeds
8 Peripheral drift illusion
8 Quad-power prime seeds
8 Random sentence from book
8 Raster bars
8 Recursive descent parser generator
8 Remote agent/Agent logic
8 Remote agent/Simulation
8 Segmentation fault protection
8 Strassen's algorithm
8 Super-Poulet numbers
8 Wasteful, equidigital and frugal numbers
8 Waveform analysis/Doh ray me O O
8 WiktionaryDumps to words
7 Bifid cipher
7 Boids
7 Boustrophedon transform
7 Chess player
7 Compiler/Simple file inclusion pre processor
7 Latin Squares in reduced form/Randomizing using Jacobson and Matthews’ Technique
7 Process SMIL directives in XML data
7 Remote agent/Agent interface
7 Smallest number k such that k+2^m is composite for all m less than k
7 Sorensen–Dice coefficient
7 Transliterate English text using the Greek alphabet
7 Worthwhile task shaving
6 Anagram generator
6 Autogram checker
6 Convert CSV records to TSV
6 Create an executable for a program in an interpreted language
6 Create your own text control codes
6 Divide a rectangle into a number of unequal triangles
6 Dominoes
6 Engel expansion
6 Factor-perfect numbers
6 OLE automation O O O
6 P-Adic square roots
6 Particle fountain
6 Red black tree sort
6 Rosetta Code/List authors of task descriptions
6 Selection bias in clinical sciences
6 Solve a Rubik's cube
6 Statistics/Chi-squared distribution
6 Use a REST API
6 Wave function collapse
5 Cycles of a permutation
5 Erdős–Woods numbers
5 Generalised floating point multiplication
5 Multiton
5 Number triplets game
5 Solving coin problems
5 Unicode polynomial equation O
5 Waveform analysis/Top and tail O
5 Weather routing
4 15 puzzle game in 3D
4 Blackjack strategy
4 CLI-based maze-game
4 Compiler/Preprocessor
4 Cross compilation
4 Diophantine linear system solving
4 IRC gateway O
4 Sanitize user input
4 Ukkonen’s suffix tree construction
4 Uno (card game)
4 Vidir
3 3d turtle graphics
3 Elevator simulation
3 WebGL rotating F