Rosetta Code/Count examples/Full list/Tier 4

Revision as of 00:38, 6 December 2021 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 Ring          ㉝ AutoHotkey    ㉞ ALGOL_68      ㉟ Jq           
    ㊱ F_Sharp       ㊲ JavaScript    ㊳ Common_Lisp   ㊴ AWK           ㊵ Delphi       
As of 2021-12-06T00:35:25Z :: Tasks: 1144 :: Draft Tasks:336 :: Total Tasks: 1480 :: Total Examples: 82441
Count Task
511 Hello world/Text
335 99 bottles of beer
329 FizzBuzz
322 100 doors
299 Fibonacci sequence
295 Factorial
280 Comments
271 A+B
267 Empty program
244 Function definition
238 Loops/Infinite
233 Arrays
232 Loops/While
232 Reverse a string
230 Ackermann function
219 Loops/For
211 Conditional structures
205 Arithmetic/Integer
205 Greatest common divisor
201 Greatest element of a list
197 Even or odd
196 Array concatenation
190 Repeat a string
189 Averages/Arithmetic mean
189 Integer comparison
185 Increment a numerical string
181 Copy a string
181 Hello world/Graphical
180 Sieve of Eratosthenes
176 Boolean values
173 Array length
173 Loops/Downward for
172 Binary digits
171 Character codes
170 Apply a callback to an array
170 Integer sequence
170 Towers of Hanoi
169 String concatenation
169 String length
168 Loops/For with a specified step
167 Loops/Do-while
167 Loops/Foreach
167 Palindrome detection
167 Rot-13
167 Sum and product of an array
166 Hello world/Newline omission
166 Loops/N plus one half
166 Tokenize a string
164 String case
164 Sum of a series
163 Loops/Break
162 Empty string
161 Generic swap
159 Dot product
159 Leap year
159 Quine
158 Sum of squares
157 Hailstone sequence
157 Logical operations
156 Filter
153 Sort an integer array
153 Sorting algorithms/Bubble sort
152 Associative array/Creation
152 Roman numerals/Encode
151 Factors of an integer
150 Caesar cipher
148 Execute a system command
148 Remove duplicate elements
147 Loop over multiple arrays simultaneously
146 Higher-order functions
145 Determine if a string is numeric
145 Guess the number
145 Stack
144 System time
143 Sorting algorithms/Quicksort
142 Bitwise operations
142 Luhn test of credit card numbers
141 File input/output
141 Primality by trial division
141 User input/Text
139 Generate lower case ASCII alphabet
139 Happy numbers
139 Hello world/Standard error
138 Mutual recursion
137 Command-line arguments
137 Day of the week
137 Read entire file
137 Substring
137 Zero to the zero power
135 Check that file exists
135 Create a file
135 Loops/Continue
133 Least common multiple
133 Pascal's triangle
133 Sleep
131 ABC problem
131 Balanced brackets
131 Ethiopian multiplication
131 Literals/String
130 Date format
130 Flatten a list
130 Variables
128 Program termination
127 Compound data type
127 Include a file O
126 Binary search
126 Literals/Integer
125 Count in octal
125 Detect division by zero O
125 Function composition
125 Roman numerals/Decode
124 Formatted numeric output
124 Knuth shuffle
124 Loops/Nested
124 Mandelbrot set
124 N-queens problem
123 Count occurrences of a substring
123 Matrix multiplication
123 Matrix transposition
123 Sorting algorithms/Insertion sort
122 Associative array/Iteration
122 Averages/Root mean square
121 Case-sensitivity of identifiers
121 Null object
121 Pick random element
121 Read a file line by line
120 Haversine formula
119 Anagrams
119 Identity matrix
119 Multiplication tables
119 Search a list
118 Guess the number/With feedback
118 Real constants and functions
118 Return multiple values
117 Averages/Median
117 File size
117 Hash from two arrays
117 Letter frequency
117 Look-and-say sequence
117 String matching
116 Align columns
116 Assertions
116 Classes O
116 Delete a file
116 Perfect numbers
115 Babbage problem
115 Environment variables
115 Find limit of recursion
115 HTTP
115 Rename a file
114 Conway's Game of Life
114 Input loop
114 Pangram checker
113 Arithmetic/Complex
112 Random numbers
112 Sierpinski triangle
111 Catalan numbers
111 Evaluate binomial coefficients
111 Hostname
110 Accumulator factory
110 Infinity
110 Levenshtein distance
109 Arithmetic-geometric mean
109 Permutations
109 Reverse words in a string
109 Run-length encoding
109 String append
109 Strip a set of characters from a string
109 Substring/Top and tail
109 Temperature conversion
108 Averages/Pythagorean means
108 Horner's rule for polynomial evaluation
107 Comma quibbling
107 Harshad or Niven series
107 Variadic function
107 Zig-zag matrix
106 Anonymous recursion
106 Bulls and cows
106 Program name
106 Strip whitespace from a string/Top and tail
105 Nth root
105 Prime decomposition
105 Regular expressions
105 Sorting algorithms/Merge sort
105 String interpolation (included)
105 The Twelve Days of Christmas
104 Combinations
103 Call a function
103 Exceptions
103 Queue/Definition
103 Sorting algorithms/Selection sort
103 Sum multiples of 3 and 5
103 Trigonometric functions
102 N'th
102 Ordered words
102 Vector products
101 Create a two-dimensional array at runtime
101 Digital root
101 Short-circuit evaluation
101 Sierpinski carpet
101 Sum digits of an integer
100 Middle three digits
100 Power set
100 Shell one-liner O
100 String prepend
99 24 game
99 Arbitrary-precision integers (included) O O
99 Execute Brain****
98 Abundant, deficient and perfect number classifications
98 Enumerations
98 Interactive programming O O O
98 Range extraction
98 Sorting algorithms/Gnome sort
98 Walk a directory/Non-recursively O
97 Range expansion
97 Y combinator
96 Collections
96 Sorting algorithms/Cocktail sort
95 Create an HTML table
95 Exponentiation operator
95 First-class functions O
95 Hello world/Newbie
95 Time a function
94 Averages/Mode
94 Dragon curve O
94 Evolutionary algorithm
94 Hofstadter Q sequence
94 One-dimensional cellular automata
94 Sequence of non-squares
94 Symmetric difference
93 Random number generator (included)
93 Sort using a custom comparator
92 Amicable pairs
92 Cumulative standard deviation
92 Forward difference
92 Inheritance/Single O O
92 MD5
92 Sorting algorithms/Bogosort
91 Entropy
91 Langton's ant
91 Number names
90 Averages/Simple moving average
90 Calculating the value of e
90 Catamorphism
90 Gray code
90 JSON
90 Monty Hall problem
90 Price fraction
90 String comparison
90 Tree traversal
89 Hamming numbers
89 Josephus problem
89 Map range
89 Menu
89 Number reversal game
88 Compare a list of strings
88 Five weekends
88 Floyd's triangle
88 Greatest subsequential sum
88 Last Friday of each month
88 Simple windowed application O
87 Abstract type O O O
87 Almost prime
87 Sorting algorithms/Heapsort
86 CSV data manipulation
86 Non-decimal radices/Convert
86 Queue/Usage
86 Sort an array of composite structures
86 Terminal control/Clear the screen
85 CSV to HTML translation
85 Count in factors
85 Monte Carlo methods
85 SEDOLs
85 Walk a directory/Recursively
84 Address of a variable O O O
84 Closures/Value capture
84 Find the last Sunday of each month
84 Order two numerical lists
84 Split a character string based on change of character
84 Top rank per group
84 URL decoding
84 Window creation
83 Bitmap O
83 File modification time
83 Hello world/Line printer
83 Read a specific line from a file
83 Repeat
83 Set
83 Show ASCII table
83 Terminal control/Ringing the terminal bell
83 Word wrap
82 Anti-primes
82 Box the compass
82 Introspection
82 Sorting algorithms/Shell sort
81 Here document O
81 Munchausen numbers
81 Operator precedence
81 Playing cards
81 Web scraping
80 CRC-32
80 Count the coins
80 Literals/Floating point
80 Long multiplication
80 Lucas-Lehmer test
80 Pythagorean triples
80 Roots of unity
80 Singly-linked list/Traversal
80 Sockets
80 Sorting algorithms/Counting sort
80 Spiral matrix
79 Concurrent computing O
79 Dynamic variable names O
79 Find common directory path
79 Find the missing permutation
79 Jensen's Device
79 Keyboard input/Obtain a Y or N response
79 Multifactorial
79 Population count
79 Proper divisors
79 Show the epoch O
79 URL encoding
79 XML/Input
78 Call an object method O
78 Date manipulation
78 Linear congruential generator
78 Modular inverse
78 Soundex
78 Strip comments from a string
77 Kaprekar numbers
77 Knapsack problem/0-1
77 Phrase reversals
77 Semordnilap
77 Sorting algorithms/Comb sort
76 Averages/Mean angle
76 Empty directory
76 Equilibrium index
76 Execute HQ9+
76 Flow-control structures
76 Hello world/Web server
76 Non-decimal radices/Output
76 Pi
76 Sort disjoint sublist
76 Sudoku
76 Unicode variable names O
76 Vigenère cipher
75 Anagrams/Deranged anagrams
75 Calendar
75 Fibonacci n-step number sequences
75 Man or boy test
75 Multiple distinct objects
75 Parsing/RPN calculator algorithm
75 Read a configuration file
75 Rep-string
75 SHA-1
75 Special characters
75 Take notes on the command line
75 Write entire file
74 AKS test for primes
74 Animation O
74 Combinations with repetitions
74 Currying
74 Department numbers
74 Enforced immutability O
74 Gamma function
74 Guess the number/With feedback (player)
74 Jump anywhere O O
74 List comprehensions
74 Long year
74 Quaternion type
74 Rock-paper-scissors
74 Singly-linked list/Element definition
74 Thue-Morse
74 Trabb Pardo–Knuth algorithm
74 Zeckendorf number representation
73 15 puzzle game
73 Euler's sum of powers conjecture
73 Exceptions/Catch an exception thrown in a nested call
73 Four bit adder
73 Fractal tree
73 Old lady swallowed a fly
73 SHA-256
73 Square but not cube
73 Stair-climbing puzzle
72 100 prisoners
72 Bitmap/Bresenham's line algorithm O
72 Convert seconds to compound duration
72 Extend your language
72 Priority queue
71 Call a foreign-language function
71 Draw a sphere
71 Horizontal sundial calculations
71 IBAN
71 Longest common subsequence
71 Pernicious numbers
71 Polymorphism
71 Sorting algorithms/Stooge sort
70 Arithmetic/Rational
70 Catalan numbers/Pascal's triangle
70 Closest-pair problem
70 Constrained random points on a circle
70 Fork O
70 Largest int from concatenated ints
70 Maze generation
70 Named parameters O
70 Nested function
70 Numerical integration
70 Self-describing numbers
70 Sort three variables
70 Sorting algorithms/Pancake sort
70 Special variables
70 Van der Corput sequence
70 Write float arrays to a text file
69 Angle difference between two bearings
69 Barnsley fern
69 Benford's law
69 General FizzBuzz
69 Magic squares of odd order
69 Sequence of primes by trial division
69 Text processing/Max licenses in use
69 Yin and yang
68 Chinese remainder theorem
68 Damm algorithm
68 Euler method
68 Morse code
68 Remove lines from a file
68 Runtime evaluation
68 Strip control codes and extended characters from a string
68 Unix/ls
67 Amb
67 Circles of given radius through two points
67 Fast Fourier transform
67 Hofstadter-Conway $10,000 sequence
67 Jewels and stones
67 Narcissistic decimal number
67 One of n lines in a file
67 Roots of a function
67 Semiprime
67 Sort stability
67 Stern-Brocot sequence
67 Write language name in 3D ASCII
66 Abundant odd numbers
66 Attractive numbers
66 Continued fraction
66 Documentation
66 Factors of a Mersenne number
66 HTTPS
66 Inheritance/Multiple O O
66 Memory allocation O O
66 Optional parameters
66 Variable size/Get O O
66 XML/Output
65 Best shuffle
65 Exponentiation order
65 Get system command output
65 Host introspection O
65 Modular exponentiation
65 Plot coordinate pairs
65 Probabilistic choice
65 Roots of a quadratic function
65 Singly-linked list/Element insertion
65 Tic-tac-toe
65 Van Eck sequence
64 Animate a pendulum
64 Cholesky decomposition
64 Reduced row echelon form
64 Undefined values
64 Word frequency
63 Binary strings
63 Extract file extension
63 Globally replace text in several files
63 Non-decimal radices/Input
63 Runge-Kutta method
63 Two sum
62 24 game/Solve
62 Arithmetic evaluation
62 Bitmap/Write a PPM file
62 CUSIP
62 Cartesian product of two or more lists
62 Dutch national flag problem
62 Emirp primes
62 Gapful numbers
62 Generator/Exponential
62 I before E except after C
62 ISBN13 check digit
62 Integer overflow
62 Longest common prefix
62 Magic 8-ball
62 Miller–Rabin primality test
62 Mouse position O
62 Partial function application
62 Sorting algorithms/Sleep sort
62 Terminal control/Display an extended character
62 Test a function
62 Truncatable primes
61 2048
61 Averages/Mean time of day
61 Compile-time calculation O O O
61 Determine if a string is collapsible
61 Draw a clock
61 Huffman coding
61 User input/Graphical O
60 4-rings or 4-squares puzzle
60 9 billion names of God the integer
60 Add a variable to a class instance at runtime O O O O
60 Brownian tree
60 Determine if a string has all the same characters
60 JortSort
60 Knapsack problem/Continuous
60 Knapsack problem/Unbounded
60 Left factorials
60 Leonardo numbers
60 Ludic numbers
60 Sorting algorithms/Bead sort
60 Subleq
60 Unicode strings
59 Doubly-linked list/Element definition
59 Draw a cuboid
59 Knight's tour
59 Matrix-exponentiation operator
59 Pascal matrix generation
59 Pointers and references O
59 Random number generator (device)
59 Stem-and-leaf plot
59 Ternary logic
58 Base64 encode data
58 Chinese zodiac
58 Deal cards for FreeCell
58 Define a primitive data type O
58 Discordian date
58 Fibonacci word
58 Grayscale image O
58 Hash join
58 Mad Libs
58 McNuggets problem
58 Multisplit
58 Odd word problem
58 Scope modifiers O
58 Sierpinski triangle/Graphical
58 Terminal control/Cursor positioning
58 Truncate a file
58 Unbias a random generator
57 Convert decimal number to rational
57 Delegates O
57 Dinesman's multiple-dwelling problem
57 Kernighans large earthquake problem
57 LZW compression
57 Munching squares
57 Quickselect algorithm
57 Singleton O
57 Sorting algorithms/Permutation sort
57 Terminal control/Coloured text
57 Topological sort
56 Base64 decode data
56 Call a function in a shared library
56 Copy stdin to stdout
56 DNS query
56 Dijkstra's algorithm
56 Draw a pixel
56 Extreme floating point values
56 FASTA format
56 Forest fire
56 Keyboard input/Keypress check
56 Modulinos
56 Perfect shuffle
56 Rosetta Code/Rank languages by popularity
56 Runtime evaluation/In an environment
56 Stack traces O
56 Universal Turing machine
56 Vector
55 Bernoulli numbers
55 Iterated digits squaring
55 Longest common substring
55 RPG attributes generator
55 Sattolo cycle
55 Smith numbers
55 Statistics/Basic
55 Validate International Securities Identification Number
55 XML/XPath
54 Archimedean spiral
54 Handle a signal
54 Inverted syntax O O O O
54 Loops/Increment loop index within loop body
54 Maximum triangle path sum
54 Non-continuous subsequences
54 Seven-sided dice from five-sided dice
54 Shoelace formula for polygonal area
54 Sort numbers lexicographically
54 Strip block comments
54 Synchronous concurrency O
54 Tokenize a string with escaping
54 Wireworld
54 XML/DOM serialization
53 Associative array/Merging
53 Dining philosophers
53 First-class functions/Use numbers analogously O
53 Heronian triangles
53 Move-to-front algorithm
53 Nim game
53 Password generator
53 Polynomial regression
53 Rate counter
53 Search a list of records
53 Send email O
53 Text processing/2
53 Two identical strings
52 Additive primes
52 Cantor set
52 Chaos game
52 Colour bars/Display
52 Determinant and permanent
52 Determine if a string has all unique characters
52 Find the intersection of two lines
52 Fractran
52 Gaussian elimination
52 Holidays related to Easter
52 Longest increasing subsequence
52 Naming conventions
52 Pig the dice game
52 Remove vowels from a string
51 Doubly-linked list/Element insertion
51 Egyptian division
51 Farey sequence
51 GUI component interaction O
51 Longest string challenge
51 Make directory path
51 Primality by Wilson's theorem
51 Respond to an unknown method call O O
51 Water collected between towers
51 Zebra puzzle
50 Append a record to the end of a text file
50 Bell numbers
50 Days between dates
50 Doubly-linked list/Traversal
50 Fusc sequence
50 Hofstadter Figure-Figure sequences
50 Jaro similarity
50 Kronecker product
50 Metaprogramming O O
50 Stable marriage problem
50 Sum of divisors
50 Sum of first n cubes
50 Text processing/1
49 Echo server
49 Execute a Markov algorithm
49 Extensible prime generator
49 Greyscale bars/Display
49 Largest proper divisor of n
49 Last letter-first letter
48 Bitmap/Flood fill O
48 Determine if a string is squeezable
48 Element-wise operations
48 Elementary cellular automaton
48 History variables O
48 Image noise O
48 OpenGL O
48 Polymorphic copy O
48 Polynomial long division
48 Recaman's sequence
48 Sparkline in unicode
48 Tau number
48 Taxicab numbers
48 Verify distribution uniformity/Naive
48 Visualize a tree
47 Active object O
47 Average loop length
47 Bitmap/Read a PPM file O
47 Determine if only one instance is running
47 Doubly-linked list/Definition
47 Generate Chess960 starting position
47 Narcissist
47 Problem of Apollonius
47 Set consolidation
47 Text between
47 Ulam spiral (for primes)
46 Currency
46 Flipping bits game
46 Keyboard input/Flush the keyboard buffer
46 Mertens function
46 Parsing/Shunting-yard algorithm
46 Send an unknown method call
46 Sorting algorithms/Radix sort
46 Spinning rod animation/Text
46 Start from a main routine O
46 Subtractive generator
46 Sum to 100
46 Terminal control/Dimensions
45 Abbreviations, automatic
45 Bulls and cows/Player
45 Carmichael 3 strong pseudoprimes
45 Deepcopy
45 Digital root/Multiplicative digital root
45 Fivenum
45 Hilbert curve
45 Isqrt (integer square root) of X
45 Loops/With multiple ranges
45 Perfect totient numbers
45 Rosetta Code/Count examples
45 Secure temporary file
45 Sorting Algorithms/Circle Sort
45 Speech synthesis
45 The Name Game
45 Truth table
45 UTF-8 encode and decode
45 Words containing "the" substring
44 Atomic updates O O
44 Bitmap/Midpoint circle algorithm O
44 Chowla numbers
44 GUI/Maximum window dimensions O
44 Hickerson series of almost integers
44 MD5/Implementation
44 Musical scale
44 Percentage difference between images O
44 Ranking methods
44 Sailors, coconuts and a monkey problem
44 Sort a list of object identifiers
44 Twelve statements
43 Aliquot sequence classifications
43 Balanced ternary
43 Brazilian numbers
43 Casting out nines
43 Color of a screen pixel O
43 Combinations and permutations
43 Coprimes
43 Cycle detection
43 Idiomatically determine all the lowercase and uppercase letters
43 Inverted index
43 Knapsack problem/Bounded
43 Permutations by swapping
43 Permutations/Derangements
43 S-expressions
43 Sum of the digits of n is substring of n
43 Summarize and say sequence
43 Table creation/Postal addresses
43 Totient function
43 Voronoi diagram
42 Abbreviations, easy
42 Approximate equality
42 Bioinformatics/base count
42 Calendar - for "REAL" programmers
42 Colour pinstripe/Display O
42 Cramer's rule
42 Euler's identity
42 Julia set
42 Loops/Wrong ranges
42 Numbers divisible by their individual digits, but not by the product of their digits.
42 Parallel calculations O O
42 Pascal's triangle/Puzzle
42 Permutations with repetitions
42 Tau function
42 Variable size/Set O O
41 21 game
41 Base 16 numbers needing a to f
41 Convex hull
41 Four is magic
41 GUI enabling/disabling of controls O
41 Largest number divisible by its digits
41 Long primes
41 MAC Vendor Lookup
41 Magic squares of doubly even order
41 Parametric polymorphism O
41 Permutation test
41 Prime conspiracy
41 Primorial numbers
41 Ray-casting algorithm
41 Read a file character by character/UTF8 O
41 Rosetta Code/Find bare lang tags
41 Scope/Function names and labels
41 Sequence: smallest number with exactly n divisors
41 Sorting algorithms/Strand sort
41 Statistics/Normal distribution
41 Substitution cipher
41 Terminal control/Hiding the cursor
41 Topswops
41 Variable-length quantity
40 ABC words
40 Brace expansion
40 Create a file on magnetic tape O
40 Cuban primes
40 Display a linear combination
40 Feigenbaum constant calculation
40 File extension is in extensions list
40 Find the intersection of a line with a plane
40 Humble numbers
40 Input/Output for lines of text
40 Input/Output for pairs of numbers
40 Knuth's algorithm S
40 LU decomposition
40 Palindrome dates
40 Pathological floating point problems
40 Penney's game
40 Pythagorean quadruples
40 Safe primes and unsafe primes
40 Terminal control/Inverse video
40 Test integerness
39 Bitwise IO O
39 Check output device is a terminal
39 Cousin primes
39 Events
39 Factorions
39 Fibonacci word/fractal
39 Floyd-Warshall algorithm
39 Function prototype O O
39 Integer roots
39 Kahan summation
39 Lychrel numbers
39 Maze solving
39 Metered concurrency
39 Multiple regression
39 Order disjoint list items
39 Parsing/RPN to infix conversion
39 QR decomposition
39 Sutherland-Hodgman polygon clipping
39 Vampire number
39 Yellowstone sequence
38 Abbreviations, simple
38 Break OO privacy O
38 Constrained genericity O O O
38 Find palindromic numbers in both binary and ternary bases
38 Frobenius numbers
38 Lah numbers
38 Metronome
38 Minesweeper game
38 Pinstripe/Display
38 Solve the no connection puzzle
38 Special Divisors
38 Terminal control/Unicode output
37 Bitmap/Bézier curves/Cubic O
37 Determine if two triangles overlap
37 Extra primes
37 MD4
37 Multiline shebang
37 Mutex
37 Numbers which binary and ternary digit sum are prime
37 Numerical integration/Gauss-Legendre Quadrature
37 Object serialization O
37 Ordered partitions
37 Pentagram
37 Primes whose sum of digits is 25
37 Pythagoras tree
37 RSA code
37 Smallest square that begins with n
37 Square-free integers
37 Subset sum problem
36 Apply a digital filter (direct form II transposed)
36 Arithmetic-geometric mean/Calculate Pi
36 Cheryl's birthday
36 Church numerals
36 Conjugate transpose
36 Egyptian fractions
36 Find words which contains more than 3 e vowels
36 Find words with alternating vowels and consonants
36 Gauss-Jordan matrix inversion
36 Multi-dimensional array
36 Nice primes
36 Old Russian measure of length
36 Parametrized SQL statement
36 Product of divisors
36 RIPEMD-160
36 Sequence: smallest number greater than previous term with exactly n divisors
36 Strong and weak primes
36 Triplet of three numbers
35 Bacon cipher
35 Chaocipher
35 Circular primes
35 Dice game probabilities
35 Diversity prediction theorem
35 Eban numbers
35 Entropy/Narcissist
35 Length of an arc between two angles
35 Longest common suffix
35 Partition an integer x into n primes
35 Pattern matching
35 Sorting algorithms/Patience sort
35 Strange numbers
35 Textonyms
35 Zumkeller numbers
34 Bitmap/Histogram O
34 Check input device is a terminal
34 Continued fraction/Arithmetic/Construct from rational number
34 Create an object at a given address O O
34 Decimal floating point number to binary
34 First power of 2 that has leading decimal digits of 12
34 Galton box animation
34 Halt and catch fire
34 Koch curve
34 Mersenne primes
34 Modular arithmetic
34 Multiplicative order
34 Negative base numbers
34 Poker hand analyser
34 Reflection/List properties
34 Set puzzle
34 Solve a Hidato puzzle
34 Sorting algorithms/Cycle sort
34 Straddling checkerboard
34 Strange plus numbers
34 Sum of elements below main diagonal of matrix
34 Terminal control/Cursor movement
34 Terminal control/Preserve screen
34 Topic variable O
34 Type detection
34 Unique characters
34 Use another language to call a function
34 Xiaolin Wu's line algorithm
34 Zhang-Suen thinning algorithm
33 Bitcoin/address validation
33 Bitmap/Bézier curves/Quadratic O
33 Burrows–Wheeler transform
33 Change e letters to i in words
33 Executable library
33 Faulhaber's triangle
33 Implicit type conversion
33 Long literals, with continuations
33 Mian-Chowla sequence
33 Numbers with equal rises and falls
33 Parse command-line arguments
33 Pell's equation
33 Resistor mesh
33 Set of real numbers
33 Shift list elements to left by 3
33 Smarandache prime-digital sequence
33 URL parser
33 Unprimeable numbers
33 Write to Windows event log
32 Bin given limits
32 Chat server O
32 Compiler/lexical analyzer
32 Death Star O
32 Decision tables
32 Digit fifth powers
32 Draw a rotating cube
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 Law of cosines - triples
32 Minimum number of cells after, before, above and below NxN squares
32 Minimum positive multiple in base 10 using only 0 and 1
32 Numbers with prime digits whose sum is 13
32 Numeric error propagation
32 Parallel brute force
32 Polyspiral
32 Pragmatic directives O
32 Range consolidation
32 Rosetta Code/Find unimplemented tasks
32 Sexy primes
32 Simple database
32 Strange unique prime triplets
32 Successive prime differences
32 Super-d numbers
32 Superellipse
32 Word break problem
31 Alternade words
31 Angles (geometric), normalization and conversion
31 Arena storage pool
31 Chebyshev coefficients
31 Check Machin-like formulas
31 Checkpoint synchronization
31 Chemical calculator
31 Count how many vowels and consonants occur in a string
31 Esthetic numbers
31 Fairshare between two and more
31 Find prime numbers of the form n*n*n+2
31 First class environments
31 HTTPS/Authenticated
31 Memory layout of a data structure O O
31 Peano curve
31 Pierpont primes
31 Primes with digits in nondecreasing order
31 Rosetta Code/Fix code tags
31 State name puzzle
31 Stirling numbers of the first kind
31 Stirling numbers of the second kind
31 Stream merge
31 Update a configuration file
31 Verify distribution uniformity/Chi-squared test
31 Weird numbers
31 Window creation/X11 O O
31 Word wheel
30 AVL tree
30 Deconvolution/1D
30 Fermat numbers
30 Find words which contains all the vowels
30 Find words whose first and last three letters are equal
30 Generate random chess position
30 Increasing gaps between consecutive Niven numbers
30 Kronecker product based fractals
30 Machine code
30 Magnanimous numbers
30 Mayan numerals
30 Nonoblock
30 Perlin noise
30 Show the (decimal) value of a number of 1s appended with a 3, then squared
30 Sierpinski pentagon
30 Sum and product puzzle
30 Twin primes
29 Active Directory/Connect O
29 Calkin-Wilf sequence
29 Common sorted list
29 Finite state machine
29 First perfect square in base n with n unique digits
29 Formal power series
29 Fraction reduction
29 Go Fish
29 Honeycombs O
29 Möbius function
29 Natural sorting
29 Partition function P
29 Plasma effect
29 Ramsey's theorem
29 Reflection/List methods
29 Sorting algorithms/Cocktail sort with shifting bounds
29 Summarize primes
29 Superpermutation minimisation
29 Table creation
29 Teacup rim text
29 Thiele's interpolation formula
29 World Cup group stage
28 A* search algorithm
28 Birthday problem
28 Cipolla's algorithm
28 Cut a rectangle
28 Distinct power numbers
28 Find if a point is within a triangle
28 Find largest left truncatable prime in a given base
28 Fixed length records
28 Hunt the Wumpus
28 Image convolution
28 Monads/Maybe monad
28 N-smooth numbers
28 Nautical bell
28 Palindromic gapful numbers
28 Paraffins
28 Same fringe
28 Shortest common supersequence
28 Solve a Holy Knight's tour
28 Sylvester's sequence
28 The ISAAC Cipher
28 Tonelli-Shanks algorithm
28 Video display modes
28 Welch's t-test
28 Wieferich primes
27 Abelian sandpile model
27 Audio alarm
27 Card shuffles
27 Color wheel
27 Common list elements
27 Distributed programming
27 Find first missing positive
27 Find prime n such that reversed n is also prime
27 Function frequency
27 Idiomatically determine all the characters that can be used for symbols
27 Intersecting number wheels
27 Merge and aggregate datasets
27 Next highest int from digits
27 Ramer-Douglas-Peucker line simplification
27 Random Latin squares
27 Safe addition
27 Sequence of primorial primes
27 Simulate input/Keyboard
27 UPC
27 Yahoo! search interface
26 Base58Check encoding
26 Bioinformatics/Sequence mutation
26 Changeable words
26 De Bruijn sequences
26 Elliptic curve arithmetic
26 Find minimum number of coins that make a given value
26 Hough transform
26 K-means++ clustering
26 Kolakoski sequence
26 Linux CPU utilization
26 Lucky and even lucky numbers
26 Magic squares of singly even order
26 Make a backup file
26 Numbers in base 10 that are palindromic in bases 2, 4, and 16
26 Order by pair comparisons
26 Parse an IP Address
26 Permutations/Rank of a permutation
26 Pseudo-random numbers/PCG32
26 RCRPG
26 Snake and Ladder
26 Sort the letters of string in alphabetical order
26 Words from neighbour ones
25 Almkvist-Giullera formula for pi
25 Cistercian numerals
25 Coprime triplets
25 Deming's Funnel
25 Doomsday rule
25 Elementary cellular automaton/Random Number Generator
25 List rooted trees
25 Markov chain text generator
25 Matrix chain multiplication
25 Maximum difference between adjacent elements of list
25 Mind boggling card trick
25 Neighbour primes
25 Numbers with same digit set in base 10 and base 16
25 Odd words
25 Padovan sequence
25 Percolation/Mean run density
25 Piprimes
25 Play recorded sounds
25 Playfair cipher
25 Pseudo-random numbers/Xorshift star
25 Reverse the gender of a string
25 Self numbers
25 Total circles area
24 ASCII art diagram converter
24 Active Directory/Search for a user O
24 Addition chains
24 Assertions in design by contract
24 Commatizing numbers
24 Consecutive primes with ascending or descending differences
24 Exponentiation with infix operators in (or operating on) the base
24 File size distribution
24 Mastermind
24 Motzkin numbers
24 Numbers in base-16 representation that cannot be written with decimal digits
24 Numeric separator syntax
24 Orbital elements
24 Palindromic primes
24 Record sound O
24 SOAP
24 Sokoban
24 Solve a Hopido puzzle
24 Solve a Numbrix puzzle
24 Special neighbor primes
24 Spelling of ordinal numbers
24 Sum of primes in odd positions is prime
24 Sunflower fractal
24 Ulam numbers
24 Unique characters in each string
24 Untrusted environment
23 15 puzzle solver
23 Abelian sandpile model/Identity
23 Bilinear interpolation
23 Create an object/Native demonstration O
23 Erdős-primes
23 Find duplicate files
23 Index finite lists of positive integers
23 Joystick position O
23 Largest five adjacent number
23 Levenshtein distance/Alignment
23 Main step of GOST 28147-89
23 Minimum numbers of three lists
23 Monads/List monad
23 Nested templated data
23 Odd squarefree semiprimes
23 Perceptron
23 Pig the dice game/Player
23 Polynomial synthetic division
23 Rare numbers
23 Reflection/Get source
23 Sierpinski arrowhead curve
23 Sleeping Beauty problem
23 Smallest power of 6 whose decimal expansion contains n
22 Bitcoin/public point to address
22 Data Encryption Standard
22 EKG sequence convergence
22 Eertree
22 Elementary cellular automaton/Infinite length
22 Find words which contain the most consonants
22 Generate random numbers without repeating a value
22 Kosaraju
22 Line circle intersection
22 Median filter
22 Montgomery reduction
22 N-body problem
22 Native shebang
22 Palindromic primes in base 16
22 Positive decimal integers with the digit 1 occurring exactly twice
22 Prime words
22 Pseudo-random numbers/Combined recursive generator MRG32k3a
22 Reverse the order of lines in a text file while preserving the contents of each line
22 Sequence: nth number with exactly n divisors
22 Solve triangle solitare puzzle
22 Sum data type
22 Vigenère cipher/Cryptanalysis
22 Vogel's approximation method
21 10001th prime
21 Arithmetic coding/As a generalized change of radix
21 Concatenate two primes is also prime
21 Harmonic series
21 Just in time processing on a character stream
21 K-d tree
21 Knuth's power tree
21 Latin Squares in reduced form
21 Names to numbers
21 Next special primes
21 Padovan n-step number sequences
21 Pancake numbers
21 Prime numbers which contain 123
21 Prime triplets
21 Primes - allocate descendants to their ancestors
21 Primes whose first and last number is 3
21 Print debugging statement
21 Readline interface
21 Simulate input/Mouse O
21 Window management O
21 Zeckendorf arithmetic
20 Canonicalize CIDR
20 Color quantization O
20 Compare length of two strings
20 Compiler/code generator
20 Longest substrings without repeating characters
20 Metallic ratios
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 Practical numbers
20 Primes which contain only one odd digit
20 Pseudo-random numbers/Splitmix64
20 SQL-based authentication
20 Selective file copy
20 Separate the house number from the street name
20 Snake
20 Special factorials
20 Substring primes
20 Terminal control/Positional read
20 The sieve of Sundaram
20 Transportation problem
20 Wilson primes of order n
20 Word search
19 Air mass
19 Biorhythms
19 Code segment unload O
19 Compiler/virtual machine interpreter
19 Cubic Special Primes
19 Draw pixel 2
19 Find URI in text
19 Find square difference
19 Getting the number of decimals
19 HTTPS/Client-authenticated
19 Imaginary base numbers
19 Matrix digital rain
19 Nimber arithmetic
19 Numbers whose count of divisors is prime
19 Peaceful chess queen armies
19 Permuted multiples
19 Print itself O
19 Summation of primes
19 Vibrating rectangles
18 Banker's algorithm
18 Bitmap/Read an image through a pipe
18 Compare sorting algorithms' performance
18 Cyclops numbers
18 Cyclotomic polynomial
18 Free polyominoes enumeration
18 Logistic curve fitting in epidemiology
18 Minimum primes
18 NYSIIS
18 Own digits power sum
18 Particle swarm optimization
18 Percolation/Bond percolation
18 Permutations with some identical elements
18 Proof O O O
18 Quadrat Special Primes
18 Rendezvous O
18 Self-hosting compiler
18 Sierpinski curve
18 Singly-linked list/Element removal
18 Special pythagorean triplet
18 Square root by hand
18 Suffix tree
18 Tarjan
18 Two bullet roulette
18 Word ladder
17 Aspect oriented programming
17 Bioinformatics/Subsequence
17 Bitmap/PPM conversion through a pipe
17 Chernick's Carmichael numbers
17 Compiler/syntax analyzer
17 Find adjacents primes which difference is square integer
17 Four is the number of letters in the ...
17 Geometric algebra
17 Jaro-Winkler distance
17 Juggler sequence
17 Largest difference between adjacent primes
17 Last list item
17 Modified random distribution
17 Numerical integration/Adaptive Simpson's method
17 Ramanujan's constant
17 Retrieve and search chat history
17 Safe mode
17 Smallest multiple
17 Smallest numbers
17 XML validation
16 Append numbers at same position in strings
16 Compiler/AST interpreter
16 Largest prime factor
16 Legendre prime counting function
16 Longest palindromic substrings
16 Minimal steps down to 1
16 Odd and square numbers
16 OpenWebNet password
16 Prime numbers p which sum of prime numbers less or equal to p is prime
16 Sierpinski square curve
16 Sine wave
16 Topological sort/Extracted top item
16 Useless instructions
15 Continued fraction/Arithmetic/G(matrix ng, continued fraction n)
15 Distribution of 0 Digits in factorial series
15 Factorial base numbers indexing permutations of a collection
15 Fortunate numbers
15 Functional coverage tree
15 Gradient descent
15 Interactive help
15 Largest palindrome product
15 Multi-base primes
15 Non-transitive dice
15 Rodrigues’ rotation formula
15 SHA-256 Merkle tree
15 Untouchable numbers
14 Canny edge detector
14 Checksumcolor
14 Deconvolution/2D+
14 Generalised floating point addition
14 Geohash
14 Largest product in a grid
14 Minkowski question-mark function
14 Pandigital prime
14 Pisano period
14 Run as a daemon or service
14 Sorting algorithms/Tree sort on a linked list
14 Text completion
14 Tree from nesting levels
14 Unit testing
14 XXXX redacted
13 Audio frequency generator
13 Curve that touches three points
13 Display an outline as a nested table
13 Execute CopyPasta Language
13 Graph colouring
13 Greed
13 Launch rocket with countdown and acceleration in stdout
13 One-time pad
13 Penrose tiling
13 Pentomino tiling
13 Pseudorandom number generator image
13 Railway circuit
13 Simulated annealing
13 Three word location
13 Using a speech engine to highlight words
13 VList
13 What weekdays will Christmas and New Year
12 Catmull–Clark subdivision surface
12 Combinations with repetitions/Square digit chain
12 Determine sentence type
12 Distinct Palindromes within decimal numbers
12 External sort
12 Faces from a mesh
12 French Republican calendar
12 Hourglass puzzle
12 Long stairs
12 Overloaded operators
12 Quoting constructs
12 Range modifications
12 Spoof game
12 Suffixation of decimal numbers
12 Tetris
12 Time-based one-time password algorithm
11 Bioinformatics/Global alignment
11 Brace expansion using ranges
11 Colour pinstripe/Printer O
11 Conjugate a Latin verb
11 Count the coins/0-1
11 Earliest difference between prime gaps
11 Fibonacci matrix-exponentiation
11 Home primes
11 Morpion solitaire
11 Numerical and alphabetical suffixes
11 Pinstripe/Printer
11 Polynomial derivative
11 Powerful numbers
11 Resistance calculator
11 Rosetta Code/Rank languages by number of users
11 Square form factorization
11 Starting a web browser
11 Tree datastructures
11 Tropical algebra overloading
11 War card game
10 16 puzzle game
10 Camel case and snake case
10 Discrete Fourier transform
10 Elliptic Curve Digital Signature Algorithm
10 Euclid-Mullin sequence
10 Find Chess960 starting position identifier
10 IPC via named pipe
10 Magic constant
10 Mayan calendar
10 OpenGL/Utah Teapot
10 Parse EBNF
10 Ramanujan primes
10 Resistance network calculator
10 Rosetta Code/Tasks without examples
10 Sort an outline at every level
10 Text to HTML
10 Verhoeff algorithm
9 ADFGVX cipher
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 Hex words
9 Integer long division
9 Jaccard index
9 Multidimensional Newton-Raphson method
9 Simple turtle graphics
9 Terminal control/Restricted width positional input/No wrapping
9 Terminal control/Restricted width positional input/With wrapping
9 User defined pipe and redirection operators
8 Addition-chain exponentiation
8 Euler's constant 0.5772...
8 Hexapawn
8 OpenGL pixel shader
8 P-Adic numbers, basic
8 Price list behind API
8 Ramanujan primes/twins
8 Random sentence from book
8 Raster bars
8 Robots
8 Rosetta Code/Run examples
8 Round-robin tournament schedule
8 Smallest enclosing circle problem
8 Tamagotchi emulator
8 URL shortener
8 Wordiff
7 Audio overlap loop
7 Black Box
7 Boids
7 Chess player
7 Dating agency
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 Recursive descent parser generator
7 Remote agent/Agent logic
7 Remote agent/Simulation
7 Solve equations with substitution method
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 Particle fountain
6 Remote agent/Agent interface
6 Segmentation fault protection
6 Solve a Rubik's Cube
5 Dominoes
5 Generalised floating point multiplication
5 Number triplets game
5 OLE automation O O
5 P-Adic square roots
5 Solving coin problems
5 Unicode polynomial equation O
5 Waveform analysis/Top and tail O
5 Weather routing
5 WiktionaryDumps to words
4 15 puzzle game in 3D
4 Blackjack strategy
4 Erdős–Woods numbers
4 Multiton
4 Rosetta Code/List authors of task descriptions
4 Ukkonen’s suffix tree construction
4 Using the Meetup.com API
4 Vidir
3 CLI-based maze-game
3 Elevator simulation
3 Uno (Card Game)
2 IRC gateway O
1 Mine a bitcoin