Rosetta Code/Count examples/Full list/Tier 4

Revision as of 21:02, 6 March 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 Jq            ㉜ Lua           ㉝ Ring          ㉞ F_Sharp       ㉟ ALGOL_68     
    ㊱ AutoHotkey    ㊲ JavaScript    ㊳ Common_Lisp   ㊴ AWK           ㊵ Delphi       
As of 2022-03-06T20:51:53Z :: Tasks: 1148 :: Draft Tasks:371 :: Total Tasks: 1519 :: Total Examples: 84425
Count Task
518 Hello world/Text
343 99 bottles of beer
333 FizzBuzz
324 100 doors
305 Fibonacci sequence
299 Factorial
287 Comments
274 Empty program
273 A+B
249 Function definition
240 Loops/Infinite
235 Reverse a string
233 Arrays
231 Ackermann function
231 Loops/While
220 Loops/For
213 Greatest common divisor
212 Conditional structures
206 Arithmetic/Integer
204 Greatest element of a list
199 Array concatenation
199 Even or odd
193 Repeat a string
192 Integer comparison
189 Averages/Arithmetic mean
187 Increment a numerical string
185 Copy a string
185 Sieve of Eratosthenes
183 Hello world/Graphical
176 Binary digits
176 Boolean values
175 Array length
174 Loops/Downward for
174 Towers of Hanoi
172 Character codes
172 Sum and product of an array
171 Integer sequence
170 Apply a callback to an array
170 String concatenation
169 Hello world/Newline omission
169 Rot-13
169 String length
168 Loops/Do-while
168 Loops/For with a specified step
168 Loops/N plus one half
168 Palindrome detection
168 Tokenize a string
167 Loops/Foreach
165 Sum of a series
164 Empty string
164 Generic swap
164 Loops/Break
164 String case
163 Sum of squares
162 Quine
160 Leap year
159 Dot product
159 Logical operations
158 Hailstone sequence
156 Filter
155 Sorting algorithms/Bubble sort
154 Associative array/Creation
154 Factors of an integer
153 Caesar cipher
153 Sort an integer array
152 Roman numerals/Encode
150 Execute a system command
150 System time
148 Remove duplicate elements
147 Higher-order functions
147 Loop over multiple arrays simultaneously
146 Determine if a string is numeric
146 Guess the number
146 Stack
145 Sorting algorithms/Quicksort
144 Primality by trial division
144 Zero to the zero power
143 File input/output
143 Luhn test of credit card numbers
142 Bitwise operations
142 User input/Text
141 Command-line arguments
141 Generate lower case ASCII alphabet
140 Happy numbers
140 Hello world/Standard error
140 Read entire file
139 Mutual recursion
139 Substring
137 Check that file exists
137 Day of the week
136 Loops/Continue
135 Create a file
135 Least common multiple
134 Pascal's triangle
134 Sleep
133 ABC problem
133 Balanced brackets
132 Ethiopian multiplication
132 Literals/String
131 Date format
131 Program termination
131 Variables
130 Flatten a list
129 Binary search
128 Include a file O
128 Knuth shuffle
127 Compound data type
127 Literals/Integer
127 N-queens problem
126 Loops/Nested
126 Roman numerals/Decode
125 Count in octal
125 Detect division by zero O
125 Function composition
125 Read a file line by line
125 Sorting algorithms/Insertion sort
124 Count occurrences of a substring
124 Formatted numeric output
124 Mandelbrot set
124 Matrix transposition
124 Multiplication tables
123 Matrix multiplication
123 Pick random element
122 Associative array/Iteration
122 Averages/Root mean square
122 Null object
122 Real constants and functions
121 Case-sensitivity of identifiers
121 Letter frequency
121 Return multiple values
120 Align columns
120 Anagrams
120 Guess the number/With feedback
120 Haversine formula
120 Identity matrix
120 Search a list
118 Averages/Median
118 Classes O
118 Environment variables
118 Hash from two arrays
118 Look-and-say sequence
118 Perfect numbers
118 String matching
117 Assertions
117 Delete a file
117 File size
117 Find limit of recursion
117 Pangram checker
116 Babbage problem
115 HTTP
115 Input loop
114 Sierpinski triangle
113 Arithmetic/Complex
113 Conway's Game of Life
113 Rename a file
112 Catalan numbers
112 Random numbers
111 Accumulator factory
111 Evaluate binomial coefficients
111 Hostname
111 Infinity
111 Levenshtein distance
111 Strip a set of characters from a string
111 Temperature conversion
110 Anonymous recursion
110 Permutations
110 Substring/Top and tail
110 Variadic function
109 Arithmetic-geometric mean
109 Harshad or Niven series
109 Horner's rule for polynomial evaluation
109 Reverse words in a string
109 Run-length encoding
109 String append
108 Averages/Pythagorean means
108 Call a function
108 String interpolation (included)
108 Zig-zag matrix
107 Bulls and cows
107 Comma quibbling
107 Nth root
107 Program name
107 Sum multiples of 3 and 5
107 The Twelve Days of Christmas
106 Prime decomposition
106 Strip whitespace from a string/Top and tail
105 N'th
105 Regular expressions
105 Sorting algorithms/Merge sort
105 Trigonometric functions
104 Combinations
104 Create a two-dimensional array at runtime
104 Exceptions
104 Ordered words
104 Queue/Definition
104 Sorting algorithms/Selection sort
104 Vector products
103 Sierpinski carpet
102 Digital root
102 Sum digits of an integer
101 Middle three digits
101 Shell one-liner O
101 Short-circuit evaluation
100 Execute Brain****
100 Power set
100 String prepend
99 24 game
99 Abundant, deficient and perfect number classifications
99 Arbitrary-precision integers (included) O O
99 Sorting algorithms/Gnome sort
98 Enumerations
98 Evolutionary algorithm
98 Interactive programming O O O
98 Range extraction
98 Walk a directory/Non-recursively O
98 Y combinator
97 Range expansion
97 Sequence of non-squares
96 Amicable pairs
96 Collections
96 Create an HTML table
96 Sorting algorithms/Cocktail sort
95 Dragon curve O
95 Exponentiation operator
95 First-class functions O
95 Hello world/Newbie
95 Hofstadter Q sequence
95 One-dimensional cellular automata
95 Random number generator (included)
95 Symmetric difference
95 Time a function
94 Almost prime
94 Averages/Mode
94 MD5
94 Sort using a custom comparator
93 Calculating the value of e
92 Cumulative standard deviation
92 Forward difference
92 Inheritance/Single O O
92 Monty Hall problem
92 Number reversal game
92 Sorting algorithms/Bogosort
91 Entropy
91 Gray code
91 Langton's ant
91 Number names
91 String comparison
91 Tree traversal
90 Averages/Simple moving average
90 CSV data manipulation
90 Catamorphism
90 Hamming numbers
90 JSON
90 Price fraction
90 Sorting algorithms/Heapsort
89 Abstract type O O O
89 Josephus problem
89 Last Friday of each month
89 Map range
89 Menu
88 Compare a list of strings
88 Five weekends
88 Floyd's triangle
88 Greatest subsequential sum
88 Simple windowed application O
87 Non-decimal radices/Convert
87 Sort an array of composite structures
87 Terminal control/Clear the screen
86 Address of a variable O O O
86 Queue/Usage
86 URL decoding
86 Walk a directory/Recursively
85 CSV to HTML translation
85 Count in factors
85 Monte Carlo methods
85 Repeat
85 SEDOLs
85 Set
85 Show ASCII table
84 Closures/Value capture
84 File modification time
84 Find the last Sunday of each month
84 Order two numerical lists
84 Read a specific line from a file
84 Split a character string based on change of character
84 Top rank per group
84 Window creation
83 Anti-primes
83 Bitmap O
83 Box the compass
83 Munchausen numbers
83 Playing cards
83 Sorting algorithms/Shell sort
83 Terminal control/Ringing the terminal bell
83 Word wrap
82 Hello world/Line printer
82 Here document O
82 Introspection
82 Operator precedence
82 Proper divisors
81 Concurrent computing O
81 Literals/Floating point
81 Lucas-Lehmer test
81 Multifactorial
81 Pythagorean triples
81 Singly-linked list/Traversal
81 Spiral matrix
81 Web scraping
80 CRC-32
80 Count the coins
80 Dynamic variable names O
80 Find common directory path
80 Long multiplication
80 Man or boy test
80 Population count
80 Roots of unity
80 Sockets
80 Sorting algorithms/Counting sort
80 Soundex
80 URL encoding
79 Date manipulation
79 Find the missing permutation
79 Jensen's Device
79 Keyboard input/Obtain a Y or N response
79 Pi
79 Show the epoch O
79 XML/Input
78 Call an object method O
78 Execute HQ9+
78 Fibonacci n-step number sequences
78 Kaprekar numbers
78 Linear congruential generator
78 Modular inverse
78 Parsing/RPN calculator algorithm
78 Sorting algorithms/Comb sort
78 Strip comments from a string
78 Unicode variable names O
77 Jump anywhere O O
77 Knapsack problem/0-1
77 Phrase reversals
77 Semordnilap
77 Take notes on the command line
77 Thue-Morse
77 Trabb Pardo–Knuth algorithm
77 Write entire file
76 Animation O
76 Averages/Mean angle
76 Empty directory
76 Equilibrium index
76 Flow-control structures
76 Guess the number/With feedback (player)
76 Hello world/Web server
76 Non-decimal radices/Output
76 Rock-paper-scissors
76 SHA-1
76 Sort disjoint sublist
76 Sudoku
76 Vigenère cipher
76 Zeckendorf number representation
75 Anagrams/Deranged anagrams
75 Calendar
75 Combinations with repetitions
75 Department numbers
75 Extend your language
75 List comprehensions
75 Multiple distinct objects
75 Old lady swallowed a fly
75 Read a configuration file
75 Rep-string
75 Special characters
74 AKS test for primes
74 Convert seconds to compound duration
74 Currying
74 Enforced immutability O
74 Euler's sum of powers conjecture
74 Four bit adder
74 Gamma function
74 Quaternion type
74 Singly-linked list/Element definition
73 15 puzzle game
73 Draw a sphere
73 Exceptions/Catch an exception thrown in a nested call
73 Fractal tree
73 Pernicious numbers
73 SHA-256
73 Square but not cube
73 Stair-climbing puzzle
72 100 prisoners
72 Benford's law
72 Bitmap/Bresenham's line algorithm O
72 Horizontal sundial calculations
72 Longest common subsequence
72 Priority queue
72 Sort three variables
72 Special variables
71 Call a foreign-language function
71 Catalan numbers/Pascal's triangle
71 IBAN
71 Maze generation
71 Narcissistic decimal number
71 Polymorphism
71 Sequence of primes by trial division
71 Sorting algorithms/Stooge sort
71 Unix/ls
71 Van der Corput sequence
70 Arithmetic/Rational
70 Attractive numbers
70 Barnsley fern
70 Closest-pair problem
70 Constrained random points on a circle
70 Fork O
70 Largest int from concatenated ints
70 Named parameters O
70 Nested function
70 Numerical integration
70 Self-describing numbers
70 Sorting algorithms/Pancake sort
70 Text processing/Max licenses in use
70 Write float arrays to a text file
70 Yin and yang
69 Angle difference between two bearings
69 General FizzBuzz
69 Jewels and stones
69 Magic squares of odd order
69 Semiprime
68 Amb
68 Chinese remainder theorem
68 Damm algorithm
68 Euler method
68 Exponentiation order
68 Fast Fourier transform
68 Hofstadter-Conway $10,000 sequence
68 I before E except after C
68 Morse code
68 One of n lines in a file
68 Remove lines from a file
68 Runtime evaluation
68 Sort stability
68 Strip control codes and extended characters from a string
68 Variable size/Get O O
67 Abundant odd numbers
67 Circles of given radius through two points
67 ISBN13 check digit
67 Roots of a function
67 Singly-linked list/Element insertion
67 Stern-Brocot sequence
67 Write language name in 3D ASCII
66 Continued fraction
66 Documentation
66 Factors of a Mersenne number
66 HTTPS
66 Host introspection O
66 Inheritance/Multiple O O
66 Memory allocation O O
66 Optional parameters
66 Van Eck sequence
66 Word frequency
66 XML/Output
65 Animate a pendulum
65 Best shuffle
65 Binary strings
65 Extract file extension
65 Get system command output
65 Modular exponentiation
65 Plot coordinate pairs
65 Probabilistic choice
65 Roots of a quadratic function
65 Tic-tac-toe
64 Cholesky decomposition
64 Globally replace text in several files
64 Integer overflow
64 Magic 8-ball
64 Miller–Rabin primality test
64 Reduced row echelon form
64 Sorting algorithms/Sleep sort
64 Subleq
64 Undefined values
63 Additive primes
63 CUSIP
63 Knight's tour
63 Long year
63 Non-decimal radices/Input
63 RPG attributes generator
63 Runge-Kutta method
63 Test a function
63 Two sum
62 24 game/Solve
62 Arithmetic evaluation
62 Averages/Mean time of day
62 Bitmap/Write a PPM file
62 Cartesian product of two or more lists
62 Dutch national flag problem
62 Emirp primes
62 Gapful numbers
62 Generator/Exponential
62 Huffman coding
62 Longest common prefix
62 Mouse position O
62 Partial function application
62 Smith numbers
62 Terminal control/Display an extended character
62 Truncatable primes
61 2048
61 9 billion names of God the integer
61 Brownian tree
61 Compile-time calculation O O O
61 Determine if a string has all the same characters
61 Determine if a string is collapsible
61 Draw a clock
61 JortSort
61 Knapsack problem/Unbounded
61 Leonardo numbers
61 Ludic numbers
61 Sorting algorithms/Bead sort
61 Unicode strings
61 User input/Graphical O
60 4-rings or 4-squares puzzle
60 Add a variable to a class instance at runtime O O O O
60 Knapsack problem/Continuous
60 Left factorials
60 Matrix-exponentiation operator
60 McNuggets problem
60 Pascal matrix generation
59 Base64 encode data
59 Copy stdin to stdout
59 Deal cards for FreeCell
59 Define a primitive data type O
59 Doubly-linked list/Element definition
59 Draw a cuboid
59 Pointers and references O
59 Random number generator (device)
59 Scope modifiers O
59 Sierpinski triangle/Graphical
59 Stem-and-leaf plot
59 Terminal control/Coloured text
59 Ternary logic
59 Truncate a file
58 Base64 decode data
58 Chinese zodiac
58 Discordian date
58 Fibonacci word
58 Grayscale image O
58 Hash join
58 Kernighans large earthquake problem
58 Mad Libs
58 Multisplit
58 Odd word problem
58 Quickselect algorithm
58 Sorting algorithms/Permutation sort
58 Tau function
58 Terminal control/Cursor positioning
58 Unbias a random generator
58 Vector
57 Bernoulli numbers
57 Convert decimal number to rational
57 DNS query
57 Delegates O
57 Dinesman's multiple-dwelling problem
57 Draw a pixel
57 Forest fire
57 Iterated digits squaring
57 LZW compression
57 Munching squares
57 Rosetta Code/Rank languages by popularity
57 Sattolo cycle
57 Singleton O
57 Topological sort
57 Universal Turing machine
56 Archimedean spiral
56 Call a function in a shared library
56 Cantor set
56 Dijkstra's algorithm
56 Extreme floating point values
56 FASTA format
56 Keyboard input/Keypress check
56 Longest common substring
56 Modulinos
56 Nim game
56 Perfect shuffle
56 Runtime evaluation/In an environment
56 Stack traces O
56 Tokenize a string with escaping
56 Two identical strings
56 XML/XPath
55 Handle a signal
55 Inverted syntax O O O O
55 Loops/Increment loop index within loop body
55 Maximum triangle path sum
55 Sort numbers lexicographically
55 Statistics/Basic
55 Synchronous concurrency O
55 Validate International Securities Identification Number
54 First-class functions/Use numbers analogously O
54 Non-continuous subsequences
54 Password generator
54 Pig the dice game
54 Polynomial regression
54 Remove vowels from a string
54 Search a list of records
54 Send email O
54 Seven-sided dice from five-sided dice
54 Shoelace formula for polygonal area
54 Strip block comments
54 Sum of first n cubes
54 Wireworld
54 XML/DOM serialization
53 Associative array/Merging
53 Determine if a string has all unique characters
53 Dining philosophers
53 Find the intersection of two lines
53 Gaussian elimination
53 Heronian triangles
53 Hofstadter Figure-Figure sequences
53 Move-to-front algorithm
53 Rate counter
53 Sum of divisors
53 Text processing/2
52 Chaos game
52 Colour bars/Display
52 Determinant and permanent
52 Doubly-linked list/Element insertion
52 Fractran
52 Fusc sequence
52 Holidays related to Easter
52 Jaro similarity
52 Longest increasing subsequence
52 Make directory path
52 Naming conventions
52 Primality by Wilson's theorem
52 Water collected between towers
51 Bell numbers
51 Days between dates
51 Doubly-linked list/Traversal
51 Egyptian division
51 Execute a Markov algorithm
51 Extensible prime generator
51 Farey sequence
51 GUI component interaction O
51 Isqrt (integer square root) of X
51 Largest proper divisor of n
51 Longest string challenge
51 Respond to an unknown method call O O
51 Text processing/1
51 Zebra puzzle
50 Append a record to the end of a text file
50 Echo server
50 Kronecker product
50 Metaprogramming O O
50 Stable marriage problem
50 Taxicab numbers
50 Visualize a tree
50 Words containing "the" substring
49 Determine if a string is squeezable
49 Digital root/Multiplicative digital root
49 Greyscale bars/Display
49 History variables O
49 Last letter-first letter
49 OpenGL O
49 Tau number
48 Abbreviations, automatic
48 Active object O
48 Bitmap/Flood fill O
48 Determine if only one instance is running
48 Element-wise operations
48 Elementary cellular automaton
48 Image noise O
48 Polymorphic copy O
48 Polynomial long division
48 Recaman's sequence
48 Sparkline in unicode
48 Totient function
48 Ulam spiral (for primes)
48 Verify distribution uniformity/Naive
47 Average loop length
47 Bitmap/Read a PPM file O
47 Doubly-linked list/Definition
47 Generate Chess960 starting position
47 Mertens function
47 Narcissist
47 Perfect totient numbers
47 Problem of Apollonius
47 Set consolidation
47 Sorting algorithms/Radix sort
47 Text between
46 Aliquot sequence classifications
46 Currency
46 Flipping bits game
46 Hilbert curve
46 Keyboard input/Flush the keyboard buffer
46 Loops/With multiple ranges
46 Musical scale
46 Parsing/Shunting-yard algorithm
46 Rosetta Code/Count examples
46 Send an unknown method call
46 Speech synthesis
46 Spinning rod animation/Text
46 Start from a main routine O
46 Subtractive generator
46 Sum of the digits of n is substring of n
46 Sum to 100
46 Terminal control/Dimensions
45 Bitmap/Midpoint circle algorithm O
45 Bulls and cows/Player
45 Carmichael 3 strong pseudoprimes
45 Chowla numbers
45 Color of a screen pixel O
45 Deepcopy
45 Fivenum
45 Secure temporary file
45 Sorting Algorithms/Circle Sort
45 The Name Game
45 Truth table
45 Twelve statements
45 UTF-8 encode and decode
45 Variable size/Set O O
44 ABC words
44 Atomic updates O O
44 Bioinformatics/base count
44 Brazilian numbers
44 GUI/Maximum window dimensions O
44 Hickerson series of almost integers
44 Knapsack problem/Bounded
44 MD5/Implementation
44 Percentage difference between images O
44 Permutations by swapping
44 Ranking methods
44 S-expressions
44 Sailors, coconuts and a monkey problem
44 Sort a list of object identifiers
44 Summarize and say sequence
43 Abbreviations, easy
43 Balanced ternary
43 Casting out nines
43 Combinations and permutations
43 Coprimes
43 Cycle detection
43 Humble numbers
43 Idiomatically determine all the lowercase and uppercase letters
43 Inverted index
43 Numbers divisible by their individual digits, but not by the product of their digits.
43 Permutations/Derangements
43 Read a file character by character/UTF8 O
43 Safe primes and unsafe primes
43 Table creation/Postal addresses
43 Terminal control/Inverse video
43 Voronoi diagram
42 21 game
42 Approximate equality
42 Base 16 numbers needing a to f
42 Brace expansion
42 Calendar - for "REAL" programmers
42 Colour pinstripe/Display O
42 Cramer's rule
42 Euler's identity
42 Find words which contains more than 3 e vowels
42 Julia set
42 Largest number divisible by its digits
42 Loops/Wrong ranges
42 Magic squares of doubly even order
42 Parallel calculations O O
42 Pascal's triangle/Puzzle
42 Permutations with repetitions
42 Primorial numbers
42 Strange numbers
42 Substitution cipher
41 Convex hull
41 File extension is in extensions list
41 Four is magic
41 GUI enabling/disabling of controls O
41 Input/Output for lines of text
41 Input/Output for pairs of numbers
41 Long primes
41 MAC Vendor Lookup
41 Parametric polymorphism O
41 Permutation test
41 Prime conspiracy
41 Ray-casting algorithm
41 Rosetta Code/Find bare lang tags
41 Scope/Function names and labels
41 Sequence: smallest number with exactly n divisors
41 Smallest square that begins with n
41 Sorting algorithms/Strand sort
41 Statistics/Normal distribution
41 Terminal control/Hiding the cursor
41 Topswops
41 Variable-length quantity
40 Bitwise IO O
40 Create a file on magnetic tape O
40 Cuban primes
40 Display a linear combination
40 Feigenbaum constant calculation
40 Find the intersection of a line with a plane
40 Integer roots
40 Kahan summation
40 Knuth's algorithm S
40 LU decomposition
40 Metered concurrency
40 Nice primes
40 Numbers which binary and ternary digit sum are prime
40 Palindrome dates
40 Pathological floating point problems
40 Penney's game
40 Pythagoras tree
40 Pythagorean quadruples
40 QR decomposition
40 Solve the no connection puzzle
40 Special divisors
40 Test integerness
40 Vampire number
40 Yellowstone sequence
39 Break OO privacy O
39 Check output device is a terminal
39 Cheryl's birthday
39 Cousin primes
39 Events
39 Factorions
39 Fibonacci word/fractal
39 Find words which contains all the vowels
39 Floyd-Warshall algorithm
39 Function prototype O O
39 Halt and catch fire
39 Lychrel numbers
39 Maze solving
39 Multiple regression
39 Order disjoint list items
39 Parsing/RPN to infix conversion
39 Primes whose sum of digits is 25
39 Product of divisors
39 Sequence: smallest number greater than previous term with exactly n divisors
39 Sutherland-Hodgman polygon clipping
39 Triplet of three numbers
38 Abbreviations, simple
38 Church numerals
38 Constrained genericity O O O
38 Extra primes
38 Find palindromic numbers in both binary and ternary bases
38 Frobenius numbers
38 Lah numbers
38 Metronome
38 Minesweeper game
38 Pentagram
38 Pinstripe/Display
38 Terminal control/Unicode output
37 Apply a digital filter (direct form II transposed)
37 Bitmap/Bézier curves/Cubic O
37 Conjugate transpose
37 Determine if two triangles overlap
37 Find prime numbers of the form n*n*n+2
37 Find words with alternating vowels and consonants
37 MD4
37 Minimum number of cells after, before, above and below NxN squares
37 Multi-dimensional array
37 Multiline shebang
37 Mutex
37 Numerical integration/Gauss-Legendre Quadrature
37 Object serialization O
37 Ordered partitions
37 RSA code
37 Sorting algorithms/Patience sort
37 Square-free integers
37 Strong and weak primes
37 Subset sum problem
37 Unique characters
36 Arithmetic-geometric mean/Calculate Pi
36 Circular primes
36 Diversity prediction theorem
36 Egyptian fractions
36 Entropy/Narcissist
36 Gauss-Jordan matrix inversion
36 Koch curve
36 Longest common suffix
36 Mersenne primes
36 Old Russian measure of length
36 Parametrized SQL statement
36 RIPEMD-160
36 Shift list elements to left by 3
36 Sum of elements below main diagonal of matrix
35 Bacon cipher
35 Chaocipher
35 Continued fraction/Arithmetic/Construct from rational number
35 Count how many vowels and consonants occur in a string
35 Decimal floating point number to binary
35 Dice game probabilities
35 Eban numbers
35 Find prime n such that reversed n is also prime
35 Length of an arc between two angles
35 Modular arithmetic
35 Negative base numbers
35 Partition an integer x into n primes
35 Pattern matching
35 Reflection/List properties
35 Strange plus numbers
35 Terminal control/Preserve screen
35 Textonyms
35 Zumkeller numbers
34 Bitmap/Histogram O
34 Check input device is a terminal
34 Compiler/lexical analyzer
34 Create an object at a given address O O
34 Digit fifth powers
34 First power of 2 that has leading decimal digits of 12
34 Galton box animation
34 Matrix with two diagonals
34 Minimum positive multiple in base 10 using only 0 and 1
34 Multiplicative order
34 Numbers with equal rises and falls
34 Numbers with prime digits whose sum is 13
34 Odd and square numbers
34 Pell's equation
34 Poker hand analyser
34 Set puzzle
34 Solve a Hidato puzzle
34 Sorting algorithms/Cycle sort
34 Straddling checkerboard
34 Terminal control/Cursor movement
34 Topic variable O
34 Type detection
34 Use another language to call a function
34 Write to Windows event log
34 Xiaolin Wu's line algorithm
34 Zhang-Suen thinning algorithm
33 Angles (geometric), normalization and conversion
33 Bin given limits
33 Bitcoin/address validation
33 Bitmap/Bézier curves/Quadratic O
33 Burrows–Wheeler transform
33 Change e letters to i in words
33 Death Star O
33 Draw a rotating cube
33 Esthetic numbers
33 Executable library
33 Faulhaber's triangle
33 Find words whose first and last three letters are equal
33 Implicit type conversion
33 Law of cosines - triples
33 Long literals, with continuations
33 Mian-Chowla sequence
33 Möbius function
33 Parse command-line arguments
33 Resistor mesh
33 Rosetta Code/Find unimplemented tasks
33 Set of real numbers
33 Show the (decimal) value of a number of 1s appended with a 3, then squared
33 Simple database
33 Smarandache prime-digital sequence
33 Strange unique prime triplets
33 Successive prime differences
33 Superellipse
33 URL parser
33 Unprimeable numbers
33 Word wheel
32 Alternade words
32 Chat server O
32 Chemical calculator
32 Decision tables
32 Execute SNUSP
32 FTP
32 Faulhaber's formula
32 Find first and last set bit of a long integer
32 Jacobi symbol
32 Keyboard macros
32 Machine code
32 Mayan numerals
32 Numeric error propagation
32 Parallel brute force
32 Peano curve
32 Polyspiral
32 Pragmatic directives O
32 Primes with digits in nondecreasing order
32 Range consolidation
32 Rosetta Code/Fix code tags
32 Sexy primes
32 Stirling numbers of the second kind
32 Super-d numbers
32 Window creation/X11 O O
32 Word break problem
31 AVL tree
31 Arena storage pool
31 Chebyshev coefficients
31 Check Machin-like formulas
31 Checkpoint synchronization
31 Compare length of two strings
31 Deconvolution/1D
31 Fairshare between two and more
31 First class environments
31 HTTPS/Authenticated
31 Memory layout of a data structure O O
31 Partition function P
31 Pierpont primes
31 State name puzzle
31 Stirling numbers of the first kind
31 Stream merge
31 Sum and product puzzle
31 Sylvester's sequence
31 Twin primes
31 Update a configuration file
31 Verify distribution uniformity/Chi-squared test
31 Weird numbers
30 A* search algorithm
30 Calkin-Wilf sequence
30 Common sorted list
30 Distinct power numbers
30 Fermat numbers
30 Find first missing positive
30 Generate random chess position
30 Go Fish
30 Honeycombs O
30 Increasing gaps between consecutive Niven numbers
30 Kronecker product based fractals
30 Magnanimous numbers
30 N-smooth numbers
30 Nonoblock
30 Numbers in base-16 representation that cannot be written with decimal digits
30 Perlin noise
30 Plasma effect
30 Sierpinski pentagon
30 Sort the letters of string in alphabetical order
30 Summarize primes
30 Table creation
29 Active Directory/Connect O
29 Birthday problem
29 Common list elements
29 Find minimum number of coins that make a given value
29 Finite state machine
29 First perfect square in base n with n unique digits
29 Formal power series
29 Fraction reduction
29 Hunt the Wumpus
29 Merge and aggregate datasets
29 Minimum numbers of three lists
29 Motzkin numbers
29 Natural sorting
29 Ramsey's theorem
29 Reflection/List methods
29 Same fringe
29 Sorting algorithms/Cocktail sort with shifting bounds
29 Superpermutation minimisation
29 Teacup rim text
29 The ISAAC Cipher
29 Thiele's interpolation formula
29 Video display modes
29 World Cup group stage
28 10001th prime
28 Almkvist-Giullera formula for pi
28 Bioinformatics/Sequence mutation
28 Cipolla's algorithm
28 Color wheel
28 Cut a rectangle
28 De Bruijn sequences
28 Distributed programming
28 Find if a point is within a triangle
28 Find largest left truncatable prime in a given base
28 Find square difference
28 Fixed length records
28 Harmonic series
28 Image convolution
28 Intersecting number wheels
28 Monads/Maybe monad
28 Nautical bell
28 Palindromic gapful numbers
28 Paraffins
28 Safe addition
28 Shortest common supersequence
28 Solve a Holy Knight's tour
28 Tonelli-Shanks algorithm
28 Welch's t-test
28 Wieferich primes
28 Words from neighbour ones
28 Yahoo! search interface
27 Abelian sandpile model
27 Audio alarm
27 Card shuffles
27 Day of the week of Christmas and New Year
27 Find squares n where n+1 is prime
27 Function frequency
27 Idiomatically determine all the characters that can be used for symbols
27 Neighbour primes
27 Next highest int from digits
27 Numbers in base 10 that are palindromic in bases 2, 4, and 16
27 Numbers with same digit set in base 10 and base 16
27 Pseudo-random numbers/Middle-square method
27 Ramer-Douglas-Peucker line simplification
27 Random Latin squares
27 Self numbers
27 Sequence of primorial primes
27 Simulate input/Keyboard
27 Snake and Ladder
27 UPC
27 Unique characters in each string
26 Base58Check encoding
26 Changeable words
26 Coprime triplets
26 Doomsday rule
26 Elliptic curve arithmetic
26 Hough transform
26 K-means++ clustering
26 Kolakoski sequence
26 Linux CPU utilization
26 List rooted trees
26 Lucky and even lucky numbers
26 Magic squares of singly even order
26 Make a backup file
26 Matrix chain multiplication
26 Maximum difference between adjacent elements of list
26 Mind boggling card trick
26 Minimum multiple of m where digital sum equals m
26 Odd words
26 Order by pair comparisons
26 Padovan sequence
26 Parse an IP Address
26 Percolation/Mean run density
26 Permutations/Rank of a permutation
26 Piprimes
26 Pseudo-random numbers/PCG32
26 RCRPG
26 Sierpinski arrowhead curve
26 Sleeping Beauty problem
26 Special neighbor primes
26 Total circles area
25 Cistercian numerals
25 Consecutive primes with ascending or descending differences
25 Deming's Funnel
25 Elementary cellular automaton/Random Number Generator
25 Erdős-primes
25 Exactly three adjacent 3 in lists
25 File size distribution
25 Generate random numbers without repeating a value
25 Joystick position O
25 Largest five adjacent number
25 Markov chain text generator
25 Odd squarefree semiprimes
25 Palindromic primes
25 Play recorded sounds
25 Playfair cipher
25 Pseudo-random numbers/Xorshift star
25 Reflection/Get source
25 Reverse the gender of a string
25 Solve a Numbrix puzzle
25 Sum of primes in odd positions is prime
25 Sunflower fractal
24 ASCII art diagram converter
24 Abelian sandpile model/Identity
24 Active Directory/Search for a user O
24 Addition chains
24 Assertions in design by contract
24 Bilinear interpolation
24 Commatizing numbers
24 Compiler/virtual machine interpreter
24 Create an object/Native demonstration O
24 Exponentiation with infix operators in (or operating on) the base
24 Find words which contain the most consonants
24 First 9 prime Fibonacci number
24 Index finite lists of positive integers
24 Levenshtein distance/Alignment
24 Mastermind
24 Next special primes
24 Numeric separator syntax
24 Orbital elements
24 Permuted multiples
24 Positive decimal integers with the digit 1 occurring exactly twice
24 Prime triplets
24 Record sound O
24 SOAP
24 Sequence: nth number with exactly n divisors
24 Smallest power of 6 whose decimal expansion contains n
24 Sokoban
24 Solve a Hopido puzzle
24 Spelling of ordinal numbers
24 Sum of square and cube digits of an integer are primes
24 Ulam numbers
24 Untrusted environment
23 15 puzzle solver
23 Find duplicate files
23 Kosaraju
23 Largest prime factor
23 Main step of GOST 28147-89
23 Median filter
23 Monads/List monad
23 Names to numbers
23 Nested templated data
23 Palindromic primes in base 16
23 Perceptron
23 Pig the dice game/Player
23 Polynomial synthetic division
23 Prime numbers which contain 123
23 Prime words
23 Rare numbers
23 Reverse the order of lines in a text file while preserving the contents of each line
23 Steady squares
23 Sum data type
23 Summation of primes
23 Vogel's approximation method
23 Wilson primes of order n
22 Bitcoin/public point to address
22 Compiler/code generator
22 Concatenate two primes is also prime
22 Cubic special primes
22 Data Encryption Standard
22 EKG sequence convergence
22 Eertree
22 Elementary cellular automaton/Infinite length
22 Find adjacent primes which differ by a square integer
22 Knuth's power tree
22 Latin Squares in reduced form
22 Line circle intersection
22 Montgomery reduction
22 N-body problem
22 Native shebang
22 Numbers whose count of divisors is prime
22 Primes whose first and last number is 3
22 Print debugging statement
22 Pseudo-random numbers/Combined recursive generator MRG32k3a
22 Pseudo-random numbers/Splitmix64
22 Quadrat special primes
22 Solve triangle solitare puzzle
22 Substring primes
22 Vigenère cipher/Cryptanalysis
22 Window management O
22 Zeckendorf arithmetic
21 Arithmetic coding/As a generalized change of radix
21 Canonicalize CIDR
21 Code Golf: Code Golf
21 Cyclotomic polynomial
21 Just in time processing on a character stream
21 K-d tree
21 Matrix digital rain
21 Metallic ratios
21 Mosaic matrix
21 Nimber arithmetic
21 Padovan n-step number sequences
21 Pancake numbers
21 Peaceful chess queen armies
21 Practical numbers
21 Primes - allocate descendants to their ancestors
21 Primes which contain only one odd digit
21 Readline interface
21 Separate the house number from the street name
21 Sierpinski curve
21 Simulate input/Mouse O
21 Snake
21 Special factorials
21 The sieve of Sundaram
21 Transportation problem
21 Vibrating rectangles
20 Air mass
20 Append numbers at same position in strings
20 Color quantization O
20 Draw pixel 2
20 Getting the number of decimals
20 Imaginary base numbers
20 Juggler sequence
20 Largest difference between adjacent primes
20 Longest substrings without repeating characters
20 Monads/Writer monad
20 Most frequent k chars distance
20 Nonogram solver
20 P-value correction
20 Percolation/Mean cluster density
20 Percolation/Site percolation
20 SQL-based authentication
20 Selective file copy
20 Special pythagorean triplet
20 Terminal control/Positional read
20 Word search
19 Biorhythms
19 Bitmap/Read an image through a pipe
19 Code segment unload O
19 Compare sorting algorithms' performance
19 Compiler/syntax analyzer
19 Cyclops numbers
19 Find URI in text
19 Four sides of square
19 HTTPS/Client-authenticated
19 Jaro-Winkler distance
19 Last list item
19 Logistic curve fitting in epidemiology
19 Permutations with some identical elements
19 Print itself O
19 SHA-256 Merkle tree
19 Singly-linked list/Element removal
19 Smallest multiple
19 Square root by hand
19 Tarjan
19 Word ladder
18 Banker's algorithm
18 Bitmap/PPM conversion through a pipe
18 Chernick's Carmichael numbers
18 Compiler/AST interpreter
18 Free polyominoes enumeration
18 Largest product in a grid
18 Legendre prime counting function
18 Minimum primes
18 Modified random distribution
18 NYSIIS
18 Own digits power sum
18 Particle swarm optimization
18 Percolation/Bond percolation
18 Proof O O O
18 Ramanujan's constant
18 Rendezvous O
18 Retrieve and search chat history
18 Self-hosting compiler
18 Sierpinski square curve
18 Smallest numbers
18 Suffix tree
18 Two bullet roulette
18 XML validation
17 Aspect oriented programming
17 Bioinformatics/Subsequence
17 Canny edge detector
17 Collect and sort square numbers in ascending order from three lists
17 Four is the number of letters in the ...
17 Geometric algebra
17 Largest palindrome product
17 Longest palindromic substrings
17 Minimal steps down to 1
17 Numerical integration/Adaptive Simpson's method
17 Prime numbers p which sum of prime numbers less or equal to p is prime
17 Safe mode
17 Sine wave
17 Wordle comparison
16 Fortunate numbers
16 Jacobsthal numbers
16 OpenWebNet password
16 Pseudorandom number generator image
16 Run as a daemon or service
16 Sort primes from list to a list
16 Sum of two adjacent numbers are primes
16 Topological sort/Extracted top item
16 Useless instructions
15 Continued fraction/Arithmetic/G(matrix ng, continued fraction n)
15 Determine sentence type
15 Distribution of 0 digits in factorial series
15 Factorial base numbers indexing permutations of a collection
15 Functional coverage tree
15 Gradient descent
15 Interactive help
15 Minkowski question-mark function
15 Multi-base primes
15 Non-transitive dice
15 Pandigital prime
15 Pisano period
15 Quoting constructs
15 Rodrigues’ rotation formula
15 Safe and Sophie Germain primes
15 Text completion
15 Three word location
15 Tree from nesting levels
15 Untouchable numbers
15 XXXX redacted
14 Audio frequency generator
14 Checksumcolor
14 Deconvolution/2D+
14 Display an outline as a nested table
14 Generalised floating point addition
14 Geohash
14 Greed
14 Long stairs
14 Overloaded operators
14 Penrose tiling
14 Sorting algorithms/Tree sort on a linked list
14 Unit testing
14 Using a speech engine to highlight words
14 VList
13 Cullen and Woodall numbers
13 Curve that touches three points
13 Euler's constant 0.5772...
13 Execute CopyPasta Language
13 Graph colouring
13 Hourglass puzzle
13 Launch rocket with countdown and acceleration in stdout
13 Magic constant
13 One-time pad
13 Pentomino tiling
13 Railway circuit
13 Simulated annealing
13 Tetris
13 Time-based one-time password algorithm
13 Tropical algebra overloading
13 Verhoeff algorithm
12 Camel case and snake case
12 Catmull–Clark subdivision surface
12 Combinations with repetitions/Square digit chain
12 Conjugate a Latin verb
12 Deceptive numbers
12 Distinct palindromes within decimal numbers
12 External sort
12 Faces from a mesh
12 Fibonacci matrix-exponentiation
12 French Republican calendar
12 Hex words
12 Morpion solitaire
12 Range modifications
12 Rosetta Code/Rank languages by number of users
12 Rosetta Code/Tasks without examples
12 Spoof game
12 Suffixation of decimal numbers
12 Tree datastructures
12 War card game
11 Bioinformatics/Global alignment
11 Brace expansion using ranges
11 Colour pinstripe/Printer O
11 Count the coins/0-1
11 Earliest difference between prime gaps
11 Euclid-Mullin sequence
11 Home primes
11 IPC via named pipe
11 Iterators
11 Mayan calendar
11 Numerical and alphabetical suffixes
11 Pinstripe/Printer
11 Polynomial derivative
11 Powerful numbers
11 Resistance calculator
11 Simple turtle graphics
11 Square form factorization
11 Starting a web browser
11 URL shortener
10 16 puzzle game
10 ADFGVX cipher
10 Achilles numbers
10 Composite numbers k with no single digit factors whose factors are all substrings of k
10 Disarium numbers
10 Discrete Fourier transform
10 Duffinian numbers
10 Elliptic Curve Digital Signature Algorithm
10 Equal prime and composite sums
10 Find Chess960 starting position identifier
10 Jaccard index
10 OpenGL/Utah Teapot
10 Parse EBNF
10 Ramanujan primes
10 Resistance network calculator
10 Robots
10 Solve equations with substitution method
10 Sort an outline at every level
10 Terminal control/Restricted width positional input/No wrapping
10 Text to HTML
10 User defined pipe and redirection operators
9 Compiler/Verifying syntax
9 Continued fraction/Arithmetic/G(matrix ng, continued fraction n1, continued fraction n2)
9 Doubly-linked list/Element removal
9 Fibonacci heap
9 Integer long division
9 Multidimensional Newton-Raphson method
9 OpenGL pixel shader
9 Price list behind API
9 Round-robin tournament schedule
9 Set right-adjacent bits
9 Smallest enclosing circle problem
9 Terminal control/Restricted width positional input/With wrapping
9 Wordiff
8 Addition-chain exponentiation
8 Audio overlap loop
8 Dating agency
8 Hexapawn
8 P-Adic numbers, basic
8 Ramanujan primes/twins
8 Random sentence from book
8 Raster bars
8 Recursive descent parser generator
8 Remote agent/Agent logic
8 Remote agent/Simulation
8 Rosetta Code/Run examples
8 Ruth-Aaron numbers
8 Segmentation fault protection
8 Tamagotchi emulator
8 Ultra useful primes
8 WiktionaryDumps to words
7 Black Box
7 Boids
7 Brilliant numbers
7 Chess player
7 Colorful numbers
7 Curzon numbers
7 Horse racing
7 I'm a software engineer, get me out of here
7 Latin Squares in reduced form/Randomizing using Jacobson and Matthews’ Technique
7 Numbers which are not the sum of distinct squares
7 Peripheral drift illusion
7 Process SMIL directives in XML data
7 Remote agent/Agent interface
7 Search in paragraph's text
7 Strassen's algorithm
7 Waveform analysis/Doh ray me O O
6 B-spline
6 Compiler/Simple file inclusion pre processor
6 Create your own text control codes
6 Divide a rectangle into a number of unequal triangles
6 P-Adic square roots
6 Particle fountain
6 Repunit primes
6 Rhonda numbers
6 Solve a Rubik's Cube
6 Worthwhile task shaving
5 Dominoes
5 Generalised floating point multiplication
5 Multiton
5 Number triplets game
5 OLE automation O O
5 Rosetta Code/List authors of task descriptions
5 Smallest number k such that k+2^m is composite for all m less than k
5 Solving coin problems
5 Unicode polynomial equation O
5 Using the Meetup.com API
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 Diophantine linear system solving
4 Erdős–Woods numbers
4 Pell numbers
4 Ukkonen’s suffix tree construction
4 Vidir
3 Elevator simulation
3 IRC gateway O
3 Sanitize user input
3 Uno (Card Game)