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User:Garbanzo/TaskCountOutput

From Rosetta Code

Second 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
    ⑪ REXX          ⑫ Java          ⑬ Racket        ⑭ C++           ⑮ J            
    ⑯ Haskell       ⑰ Ruby          ⑱ Zkl           ⑲ D             ⑳ Tcl          
As of 2021-07-17T16:23:32Z :: Tasks: 1110 :: Draft Tasks:288 :: Total Tasks: 1398 :: Total Examples: 78167
Count Task
495 Hello world/Text
328 99 bottles of beer
321 FizzBuzz
318 100 doors
295 Fibonacci sequence
289 Factorial
276 Comments
268 A+B
262 Empty program
240 Function definition
229 Loops/Infinite
227 Reverse a string
226 Arrays
226 Loops/While
223 Ackermann function
208 Loops/For
206 Conditional structures
203 Greatest common divisor
199 Arithmetic/Integer
197 Greatest element of a list
190 Array concatenation
187 Even or odd
185 Averages/Arithmetic mean
185 Integer comparison
185 Repeat a string
183 Increment a numerical string
178 Hello world/Graphical
174 Copy a string
173 Sieve of Eratosthenes
170 Boolean values
169 Loops/Downward for
168 Binary digits
168 String concatenation
168 Towers of Hanoi
167 Character codes
166 Apply a callback to an array
166 Array length
166 Integer sequence
165 Loops/Do-while
164 Hello world/Newline omission
164 Loops/For with a specified step
164 Loops/N plus one half
164 Palindrome detection
164 Sum and product of an array
163 Loops/Foreach
163 String length
162 Rot-13
161 Loops/Break
161 String case
161 Sum of a series
161 Tokenize a string
156 Dot product
155 Generic swap
155 Leap year
155 Sum of squares
154 Empty string
154 Hailstone sequence
154 Logical operations
153 Filter
153 Quine
152 Associative array/Creation
151 Sort an integer array
150 Sorting algorithms/Bubble sort
148 Factors of an integer
147 Execute a system command
146 Roman numerals/Encode
145 Remove duplicate elements
144 Caesar cipher
144 System time
143 Determine if a string is numeric
143 Guess the number
143 Loop over multiple arrays simultaneously
142 Higher-order functions
141 Sorting algorithms/Quicksort
141 User input/Text
140 File input/output
139 Luhn test of credit card numbers
138 Hello world/Standard error
138 Primality by trial division
137 Bitwise operations
137 Day of the week
135 Command-line arguments
135 Read entire file
135 Stack
134 Create a file
134 Happy numbers
134 Loops/Continue
134 Mutual recursion
134 Substring
134 Zero to the zero power
132 Check that file exists
132 Generate lower case ASCII alphabet
132 Sleep
131 Pascal's triangle
130 Least common multiple
129 ABC problem
129 Literals/String
128 Date format
128 Flatten a list
127 Variables
126 Balanced brackets
125 Ethiopian multiplication
125 Program termination
124 Binary search
124 Compound data type
124 Include a file
124 Mandelbrot set
123 Formatted numeric output
123 Function composition
123 Literals/Integer
122 Associative array/Iteration
122 Detect division by zero
122 Roman numerals/Decode
121 Count in octal
121 Count occurrences of a substring
121 Loops/Nested
121 N-queens problem
120 Averages/Root mean square
120 Knuth shuffle
120 Null object
120 Sorting algorithms/Insertion sort
119 Haversine formula
119 Read a file line by line
117 Anagrams
117 Multiplication tables
117 Search a list
116 Guess the number/With feedback
116 Hash from two arrays
116 Identity matrix
116 Matrix multiplication
116 Matrix transposition
116 Pick random element
116 Real constants and functions
115 Babbage problem
115 Case-sensitivity of identifiers
115 Delete a file
115 File size
115 Letter frequency
114 Averages/Median
114 Classes O
114 Find limit of recursion
114 Perfect numbers
114 Rename a file
114 String matching
113 Align columns
113 Environment variables
113 Input loop
112 Look-and-say sequence
112 Pangram checker
112 Random numbers
112 Return multiple values
111 HTTP
111 Hostname
110 Arithmetic/Complex
110 Assertions
110 Conway's Game of Life
109 Catalan numbers
109 Sierpinski triangle
108 Accumulator factory
108 Infinity
108 Temperature conversion
107 Arithmetic-geometric mean
107 Strip a set of characters from a string
107 Substring/Top and tail
107 Variadic function
106 Averages/Pythagorean means
106 Evaluate binomial coefficients
106 Horner's rule for polynomial evaluation
106 Levenshtein distance
106 Permutations
106 Reverse words in a string
106 Run-length encoding
105 Prime decomposition
105 Program name
105 String append
104 Anonymous recursion
104 Regular expressions
104 String interpolation (included)
104 Strip whitespace from a string/Top and tail
104 Zig-zag matrix
103 Bulls and cows
103 Comma quibbling
103 Sorting algorithms/Merge sort
103 Trigonometric functions
102 Combinations
102 Exceptions
102 Nth root
102 Queue/Definition
101 Ordered words
101 Sorting algorithms/Selection sort
101 The Twelve Days of Christmas
100 Call a function
100 Harshad or Niven series
100 Middle three digits
100 Sum multiples of 3 and 5
99 N'th
99 Power set
99 Shell one-liner
99 Short-circuit evaluation
99 Sierpinski carpet
99 String prepend
99 Sum digits of an integer
98 24 game
98 Create a two-dimensional array at runtime
98 Vector products
97 Arbitrary-precision integers (included)
97 Range extraction
97 Y combinator
96 Interactive programming O O
96 Range expansion
96 Sorting algorithms/Gnome sort
95 Collections
95 Digital root
95 Enumerations
95 Execute Brain****
95 Walk a directory/Non-recursively
94 Abundant, deficient and perfect number classifications
94 Sequence of non-squares
94 Time a function
93 Evolutionary algorithm
93 Exponentiation operator
93 First-class functions
93 Sorting algorithms/Cocktail sort
92 Averages/Mode
92 Create an HTML table
92 Inheritance/Single
92 MD5
92 One-dimensional cellular automata
92 Random number generator (included)
91 Cumulative standard deviation
91 Dragon curve
91 Hello world/Newbie
91 Hofstadter Q sequence
91 Number names
91 Sort using a custom comparator
91 Sorting algorithms/Bogosort
90 Amicable pairs
90 Forward difference
90 JSON
90 Monty Hall problem
90 Symmetric difference
89 Averages/Simple moving average
89 Hamming numbers
89 Josephus problem
89 Langton's ant
89 Price fraction
89 String comparison
88 Entropy
88 Gray code
87 Greatest subsequential sum
87 Number reversal game
87 Sorting algorithms/Heapsort
86 CSV data manipulation
86 Catamorphism
86 Five weekends
86 Map range
86 Menu
86 Tree traversal
85 Abstract type
85 CSV to HTML translation
85 Calculating the value of e
85 Compare a list of strings
84 Almost prime
84 Floyd's triangle
84 SEDOLs
84 Simple windowed application
84 Terminal control/Clear the screen
84 Walk a directory/Recursively
84 Window creation
83 Last Friday of each month
83 Monte Carlo methods
83 Non-decimal radices/Convert
83 Queue/Usage
83 Sort an array of composite structures
82 Closures/Value capture
82 Count in factors
82 File modification time
82 Introspection
82 Set
82 URL decoding
82 Word wrap
81 Box the compass
81 Order two numerical lists
81 Terminal control/Ringing the terminal bell
81 Top rank per group
80 CRC-32
80 Find the last Sunday of each month
80 Hello world/Line printer
80 Here document O
80 Literals/Floating point
80 Long multiplication
80 Read a specific line from a file
80 Roots of unity
80 Sorting algorithms/Shell sort
79 Bitmap
79 Concurrent computing
79 Count the coins
79 Find common directory path
79 Jensen's Device
79 Playing cards
79 Repeat
79 Show the epoch
79 Singly-linked list/Traversal
79 Sorting algorithms/Counting sort
79 Spiral matrix
79 Split a character string based on change of character
79 Web scraping
79 XML/Input
78 Address of a variable O O
78 Date manipulation
78 Dynamic variable names O O
78 Multifactorial
78 Operator precedence
78 Pythagorean triples
78 Sockets
77 Find the missing permutation
77 Kaprekar numbers
77 Knapsack problem/0-1
77 Linear congruential generator
77 Lucas-Lehmer test
77 Munchausen numbers
77 Proper divisors
77 Soundex
77 Strip comments from a string
77 URL encoding
76 Averages/Mean angle
76 Call an object method O
76 Keyboard input/Obtain a Y or N response
76 Modular inverse
76 Phrase reversals
76 Sudoku
75 Man or boy test
75 Non-decimal radices/Output
75 Pi
75 Population count
75 Semordnilap
75 Show ASCII table
75 Sorting algorithms/Comb sort
75 Unicode variable names
74 Anagrams/Deranged anagrams
74 Calendar
74 Equilibrium index
74 Fibonacci n-step number sequences
74 List comprehensions
74 Parsing/RPN calculator algorithm
74 Read a configuration file
74 SHA-1
74 Vigenère cipher
74 Write entire file
73 AKS test for primes
73 Animation
73 Empty directory
73 Execute HQ9+
73 Flow-control structures
73 Gamma function
73 Hello world/Web server
73 Multiple distinct objects
73 Sort disjoint sublist
73 Special characters
73 Take notes on the command line
72 Convert seconds to compound duration
72 Exceptions/Catch an exception thrown in a nested call
72 Guess the number/With feedback (player)
72 Quaternion type
72 Rock-paper-scissors
72 SHA-256
72 Singly-linked list/Element definition
72 Stair-climbing puzzle
72 Zeckendorf number representation
71 Currying
71 Enforced immutability
71 Euler's sum of powers conjecture
71 Four bit adder
71 Fractal tree
71 Longest common subsequence
71 Polymorphism
71 Rep-string
70 15 puzzle game
70 Anti-primes
70 Bitmap/Bresenham's line algorithm
70 Call a foreign-language function
70 Closest-pair problem
70 Combinations with repetitions
70 Horizontal sundial calculations
70 IBAN
70 Largest int from concatenated ints
70 Numerical integration
70 Old lady swallowed a fly
70 Sorting algorithms/Stooge sort
70 Trabb Pardo–Knuth algorithm
70 Write float arrays to a text file
69 Catalan numbers/Pascal's triangle
69 Constrained random points on a circle
69 Draw a sphere
69 Fork
69 Magic squares of odd order
69 Maze generation
69 Named parameters O O
69 Priority queue
69 Self-describing numbers
69 Sorting algorithms/Pancake sort
69 Text processing/Max licenses in use
69 Thue-Morse
68 Barnsley fern
68 Euler method
68 Extend your language O
68 Jump anywhere
68 Van der Corput sequence
67 Amb
67 Benford's law
67 Chinese remainder theorem
67 Department numbers
67 Fast Fourier transform
67 Morse code
67 Nested function
67 Pernicious numbers
67 Remove lines from a file
67 Roots of a function
67 Sequence of primes by trial division
67 Sort stability
67 Special variables
67 Unix/ls
66 Arithmetic/Rational
66 Circles of given radius through two points
66 One of n lines in a file
66 Runtime evaluation O O O
66 Strip control codes and extended characters from a string
66 Variable size/Get O
65 Continued fraction
65 Documentation
65 General FizzBuzz
65 HTTPS
65 Hofstadter-Conway $10,000 sequence
65 Inheritance/Multiple
65 Narcissistic decimal number
65 Optional parameters
65 Roots of a quadratic function
65 Tic-tac-toe
64 Angle difference between two bearings
64 Damm algorithm
64 Factors of a Mersenne number
64 Jewels and stones
64 Reduced row echelon form
64 Word frequency
64 Write language name in 3D ASCII
64 XML/Output
64 Yin and yang
63 100 prisoners
63 Animate a pendulum
63 Exponentiation order
63 Get system command output
63 Globally replace text in several files
63 Memory allocation
63 Modular exponentiation
63 Non-decimal radices/Input
63 Plot coordinate pairs
63 Probabilistic choice
63 Semiprime
63 Singly-linked list/Element insertion
63 Sort three variables
63 Stern-Brocot sequence
63 Undefined values
62 Arithmetic evaluation
62 Best shuffle
62 Binary strings
62 Cholesky decomposition
62 Mouse position
62 Runge-Kutta method
62 Test a function
61 Averages/Mean time of day
61 Draw a clock
61 Emirp primes
61 Generator/Exponential
61 Sorting algorithms/Sleep sort
61 Truncatable primes
61 User input/Graphical
60 24 game/Solve
60 Bitmap/Write a PPM file
60 CUSIP
60 Cartesian product of two or more lists
60 Extract file extension
60 Gapful numbers
60 Huffman coding
60 Knapsack problem/Continuous
60 Miller–Rabin primality test
60 Partial function application
60 Sorting algorithms/Bead sort
60 Subleq
60 Unicode strings
60 Van Eck sequence
59 2048
59 9 billion names of God the integer
59 Abundant odd numbers
59 Add a variable to a class instance at runtime O O O
59 Brownian tree
59 Dutch national flag problem
59 Host introspection
59 JortSort
59 Knapsack problem/Unbounded
59 Knight's tour
59 Left factorials
59 Longest common prefix
59 Two sum
58 4-rings or 4-squares puzzle
58 Compile-time calculation O O
58 Hash join
58 I before E except after C
58 Integer overflow
58 Leonardo numbers
58 Ludic numbers
58 Mad Libs
58 Odd word problem
58 Random number generator (device)
58 Stem-and-leaf plot
57 Deal cards for FreeCell
57 Define a primitive data type
57 Delegates
57 Doubly-linked list/Element definition
57 Draw a cuboid
57 LZW compression
57 Long year
57 Magic 8-ball
57 Matrix-exponentiation operator O
57 Multisplit
57 Scope modifiers
57 Sierpinski triangle/Graphical
57 Singleton O
57 Sorting algorithms/Permutation sort
57 Square but not cube
57 Terminal control/Coloured text
57 Terminal control/Display an extended character
57 Ternary logic
57 Topological sort
57 Truncate a file
57 Unbias a random generator
56 DNS query
56 Determine if a string has all the same characters
56 Dinesman's multiple-dwelling problem
56 Discordian date
56 Extreme floating point values
56 Fibonacci word
56 Forest fire
56 Grayscale image
56 Quickselect algorithm
56 Rosetta Code/Rank languages by popularity
56 Stack traces
55 Base64 encode data
55 Modulinos
55 Munching squares
55 Pascal matrix generation
55 Runtime evaluation/In an environment O O
55 XML/XPath
54 Attractive numbers
54 Bernoulli numbers
54 Chinese zodiac
54 Determine if a string is collapsible
54 Draw a pixel
54 FASTA format
54 Handle a signal
54 ISBN13 check digit
54 Iterated digits squaring
54 Kernighans large earthquake problem
54 Pointers and references O
54 Synchronous concurrency
54 Terminal control/Cursor positioning
54 Universal Turing machine
54 Wireworld
53 Base64 decode data
53 Call a function in a shared library
53 Convert decimal number to rational
53 Dijkstra's algorithm
53 Dining philosophers
53 Heronian triangles
53 Keyboard input/Keypress check
53 Longest common substring
53 Loops/Increment loop index within loop body
53 Maximum triangle path sum
53 Non-continuous subsequences
53 Perfect shuffle
53 Send email O O
53 Seven-sided dice from five-sided dice
53 Statistics/Basic
53 Text processing/2
53 Validate International Securities Identification Number
53 Vector
53 XML/DOM serialization
52 Copy stdin to stdout
52 First-class functions/Use numbers analogously O
52 Gaussian elimination
52 Inverted syntax
52 Longest increasing subsequence
52 Pig the dice game
52 Polynomial regression
52 Rate counter
52 Smith numbers
52 Strip block comments
52 Tokenize a string with escaping
51 Associative array/Merging
51 Farey sequence
51 GUI component interaction
51 Holidays related to Easter
51 Longest string challenge
51 McNuggets problem
51 Move-to-front algorithm
51 Respond to an unknown method call O
51 Sattolo cycle
51 Shoelace formula for polygonal area
50 Archimedean spiral
50 Cantor set
50 Colour bars/Display
50 Find the intersection of two lines
50 Fractran
50 Jaro similarity
50 Make directory path
50 Naming conventions
50 Password generator
50 RPG attributes generator
50 Search a list of records
50 Stable marriage problem
50 Text processing/1
50 Zebra puzzle
49 Chaos game
49 Determinant and permanent
49 Doubly-linked list/Element insertion
49 Doubly-linked list/Traversal
49 Greyscale bars/Display
49 Hofstadter Figure-Figure sequences
49 Last letter-first letter
49 Metaprogramming O
49 Sort numbers lexicographically
48 Determine if a string has all unique characters
48 Echo server
48 Egyptian division
48 Execute a Markov algorithm
48 Extensible prime generator
48 History variables O
48 Polymorphic copy
48 Polynomial long division
48 Visualize a tree
48 Water collected between towers
47 Append a record to the end of a text file
47 Bitmap/Flood fill
47 Fusc sequence
47 Kronecker product
47 Narcissist
47 OpenGL
47 Problem of Apollonius
47 Ulam spiral (for primes)
47 Verify distribution uniformity/Naive
46 Active object
46 Average loop length
46 Determine if only one instance is running
46 Element-wise operations
46 Nim game
46 Parsing/Shunting-yard algorithm
46 Remove vowels from a string
46 Set consolidation
46 Sorting algorithms/Radix sort
46 Sparkline in unicode
46 Two identical strings
45 Bulls and cows/Player
45 Carmichael 3 strong pseudoprimes
45 Determine if a string is squeezable
45 Doubly-linked list/Definition
45 Generate Chess960 starting position
45 Image noise
45 Recaman's sequence
45 Rosetta Code/Count examples
45 Send an unknown method call
45 Spinning rod animation/Text
45 Sum to 100
45 Taxicab numbers
45 Text between
44 Atomic updates O
44 Bitmap/Read a PPM file
44 Currency
44 Digital root/Multiplicative digital root
44 Elementary cellular automaton
44 Flipping bits game
44 GUI/Maximum window dimensions
44 Hickerson series of almost integers
44 Percentage difference between images
44 Secure temporary file
44 Sorting Algorithms/Circle Sort
44 Subtractive generator
44 Truth table
43 Bell numbers
43 Days between dates
43 Deepcopy O
43 Fivenum
43 Inverted index
43 Keyboard input/Flush the keyboard buffer
43 Knapsack problem/Bounded
43 MD5/Implementation
43 Permutations/Derangements
43 Ranking methods
43 S-expressions
43 Sailors, coconuts and a monkey problem
43 Start from a main routine O O O O
43 Summarize and say sequence
43 Table creation/Postal addresses
43 The Name Game
43 Twelve statements
43 UTF-8 encode and decode
43 Voronoi diagram
42 Aliquot sequence classifications
42 Balanced ternary
42 Bitmap/Midpoint circle algorithm
42 Calendar - for "REAL" programmers O O
42 Combinations and permutations
42 Hilbert curve
42 Musical scale
42 Pascal's triangle/Puzzle
42 Permutations by swapping
42 Permutations with repetitions
42 Sort a list of object identifiers
42 Speech synthesis O
42 Terminal control/Dimensions
41 Casting out nines
41 Chowla numbers
41 Color of a screen pixel
41 GUI enabling/disabling of controls
41 Loops/With multiple ranges
41 Parallel calculations
41 Permutation test
41 Prime conspiracy
41 Primorial numbers
41 Sorting algorithms/Strand sort
41 Sum of divisors
41 Topswops
41 Totient function
41 Variable size/Set O O
40 21 game
40 Abbreviations, easy
40 Cramer's rule
40 Euler's identity
40 Feigenbaum constant calculation
40 Julia set
40 Magic squares of doubly even order
40 Parametric polymorphism O O O
40 Ray-casting algorithm
40 Rosetta Code/Find bare lang tags
40 Scope/Function names and labels
40 Statistics/Normal distribution
40 Tau number
40 Variable-length quantity
39 Abbreviations, automatic
39 Brace expansion
39 Brazilian numbers
39 Colour pinstripe/Display
39 Create a file on magnetic tape O
39 Cuban primes
39 Cycle detection
39 Display a linear combination
39 Events
39 File extension is in extensions list
39 Floyd-Warshall algorithm
39 Kahan summation
39 Knuth's algorithm S
39 LU decomposition
39 Largest number divisible by its digits
39 Long primes
39 MAC Vendor Lookup
39 Metered concurrency
39 Multiple regression
39 Order disjoint list items
39 Palindrome dates
39 Parsing/RPN to infix conversion
39 Penney's game
39 Perfect totient numbers
39 Pythagorean quadruples
39 Sutherland-Hodgman polygon clipping
39 Terminal control/Hiding the cursor
38 Approximate equality
38 Bioinformatics/base count
38 Break OO privacy O
38 Constrained genericity O
38 Convex hull
38 Find the intersection of a line with a plane
38 Four is magic
38 Function prototype O O
38 Humble numbers
38 Idiomatically determine all the lowercase and uppercase letters
38 Input/Output for lines of text
38 Input/Output for pairs of numbers
38 Isqrt (integer square root) of X
38 Loops/Wrong ranges
38 Lychrel numbers
38 Maze solving
38 Mertens function
38 Metronome
38 Minesweeper game
38 Pathological floating point problems
38 Primality by Wilson's theorem
38 QR decomposition
38 Read a file character by character/UTF8
38 Solve the no connection puzzle
38 Substitution cipher
38 Terminal control/Inverse video
38 Vampire number
37 Abbreviations, simple
37 Fibonacci word/fractal
37 Find palindromic numbers in both binary and ternary bases
37 MD4
37 Object serialization O
37 Safe primes and unsafe primes
37 Square-free integers
37 Test integerness
37 Words containing "the" substring
36 Bitwise IO
36 Check output device is a terminal
36 Egyptian fractions
36 Largest proper divisor of n
36 Multiline shebang
36 Numerical integration/Gauss-Legendre Quadrature
36 Ordered partitions
36 Pentagram
36 Pinstripe/Display
36 Pythagoras tree
36 RIPEMD-160
36 RSA code
36 Tau function
36 Terminal control/Unicode output
35 Arithmetic-geometric mean/Calculate Pi
35 Bitmap/Bézier curves/Cubic
35 Determine if two triangles overlap
35 Entropy/Narcissist
35 Factorions
35 Lah numbers
35 Numbers divisible by their individual digits, but not by the product of their digits.
35 Parametrized SQL statement O O
35 Sequence: smallest number with exactly n divisors
35 Subset sum problem
35 Yellowstone sequence
34 Cheryl's birthday
34 Church numerals
34 Conjugate transpose
34 Coprimes
34 Galton box animation
34 Integer roots
34 Multi-dimensional array
34 Mutex
34 Old Russian measure of length
34 Partition an integer x into n primes
34 Pattern matching O
34 Poker hand analyser
34 Set puzzle
34 Sorting algorithms/Patience sort
34 Straddling checkerboard
34 Sum of the digits of n is substring of n
34 Textonyms
34 Topic variable O O
33 Apply a digital filter (direct form II transposed)
33 Bitcoin/address validation
33 Check input device is a terminal O O
33 Continued fraction/Arithmetic/Construct from rational number
33 Decimal floating point number to binary
33 Executable library
33 Frobenius numbers
33 Multiplicative order
33 Negative base numbers
33 Parse command-line arguments
33 Resistor mesh
33 Solve a Hidato puzzle
33 Strong and weak primes
33 Terminal control/Cursor movement
33 Type detection
33 Xiaolin Wu's line algorithm
33 Zumkeller numbers
32 Bitmap/Bézier curves/Quadratic
32 Chaocipher
32 Chat server
32 Compiler/lexical analyzer
32 Cousin primes
32 Dice game probabilities
32 Draw a rotating cube
32 Eban numbers
32 Execute SNUSP
32 Faulhaber's formula
32 Faulhaber's triangle
32 First power of 2 that has leading decimal digits of 12
32 Implicit type conversion
32 Mersenne primes
32 Mian-Chowla sequence
32 Nice primes
32 Primes which sum of digits is 25
32 Product of divisors
32 Reflection/List properties O
32 Rosetta Code/Find unimplemented tasks
32 Set of real numbers
32 Sexy primes
32 Simple database
32 Sorting algorithms/Cycle sort
32 URL parser
32 Use another language to call a function
32 Write to Windows event log
32 Zhang-Suen thinning algorithm
31 Arena storage pool O
31 Bacon cipher
31 Bitmap/Histogram
31 Check Machin-like formulas
31 Checkpoint synchronization
31 Diversity prediction theorem
31 Extra primes
31 FTP
31 First class environments
31 Gauss-Jordan matrix inversion
31 Jacobi symbol
31 Keyboard macros O
31 Length of an arc between two angles
31 Longest common suffix
31 Modular arithmetic
31 Numbers with prime digits whose sum is 13
31 Numeric error propagation
31 Parallel brute force
31 Pell's equation
31 Rosetta Code/Fix code tags
31 Sequence: smallest number greater than previous term with exactly n divisors
31 Stirling numbers of the second kind
31 Strange numbers
31 Sum of first n cubes
31 Super-d numbers
31 Terminal control/Preserve screen
31 Weird numbers
31 Word break problem
30 AVL tree
30 Death Star
30 Decision tables
30 Deconvolution/1D
30 HTTPS/Authenticated
30 Koch curve
30 Numbers which binary and ternary digit sum are prime
30 Pragmatic directives
30 Smarandache prime-digital sequence
30 Special Divisors
30 State name puzzle
30 Stirling numbers of the first kind
30 Stream merge
30 Triplet of three numbers
30 Update a configuration file
30 Verify distribution uniformity/Chi-squared test
30 Window creation/X11
30 Word wheel
29 ABC words
29 Base-16 representation
29 Burrows–Wheeler transform
29 Fairshare between two and more
29 Find first and last set bit of a long integer
29 Formal power series
29 Fraction reduction
29 Honeycombs
29 Law of cosines - triples
29 Memory layout of a data structure O
29 Peano curve
29 Perlin noise
29 Polyspiral
29 Ramsey's theorem
29 Range consolidation
29 Smallest square that begins with n
29 Strange plus numbers
29 Successive prime differences
29 Sum and product puzzle
29 Superellipse
29 Superpermutation minimisation
29 Table creation
29 Thiele's interpolation formula
29 Unprimeable numbers
29 World Cup group stage
28 Active Directory/Connect
28 Angles (geometric), normalization and conversion
28 Chebyshev coefficients
28 Chemical calculator
28 Find largest left truncatable prime in a given base
28 Find prime numbers of the form n*n*n+2
28 Find words with alternating vowels and consonants
28 First perfect square in base n with n unique digits
28 Machine code
28 Möbius function
28 Natural sorting
28 Nautical bell
28 Nonoblock
28 Numbers with equal rises and falls
28 Plasma effect
28 Reflection/List methods O
28 Same fringe
28 Solve a Holy Knight's tour
28 Sorting algorithms/Cocktail sort with shifting bounds
28 Strange unique prime triplets
28 The ISAAC Cipher
28 Tonelli-Shanks algorithm
27 A* search algorithm
27 Additive primes
27 Birthday problem
27 Card shuffles
27 Circular primes
27 Create an object at a given address O O O O O
27 Cut a rectangle
27 Distributed programming
27 Fermat numbers
27 Finite state machine
27 Go Fish
27 Hunt the Wumpus
27 Image convolution
27 Minimum positive multiple in base 10 using only 0 and 1
27 Monads/Maybe monad
27 N-smooth numbers
27 Palindromic gapful numbers
27 Paraffins
27 Partition function P
27 Pierpont primes
27 Primes with digits in nondecreasing order
27 Ramer-Douglas-Peucker line simplification
27 Safe addition
27 Sequence of primorial primes
27 Shift list elements to left by 3
27 Sierpinski pentagon
27 Teacup rim text
26 Abelian sandpile model
26 Alternade words
26 Bin given limits
26 Color wheel
26 Find words which contains more than 3 e vowels
26 Fixed length records
26 Function frequency
26 Hough transform
26 Increasing gaps between consecutive Niven numbers
26 Kronecker product based fractals
26 Magic squares of singly even order
26 Mayan numerals
26 Parse an IP Address
26 Snake and Ladder
26 Summarize primes
26 Welch's t-test
25 Audio alarm
25 Base58Check encoding
25 Cipolla's algorithm
25 Elliptic curve arithmetic
25 Generate random chess position
25 Idiomatically determine all the characters that can be used for symbols
25 Intersecting number wheels
25 K-means++ clustering
25 Kolakoski sequence
25 Linux CPU utilization
25 List rooted trees
25 Long literals, with continuations
25 Magnanimous numbers
25 Make a backup file
25 Next highest int from digits
25 Play recorded sounds
25 Playfair cipher
25 Pseudo-random numbers/PCG32
25 RCRPG
25 Random Latin squares
25 Simulate input/Keyboard O
25 Total circles area
25 Yahoo! search interface
24 Common sorted list
24 De Bruijn sequences
24 Elementary cellular automaton/Random Number Generator
24 Markov chain text generator
24 Matrix chain multiplication
24 Mind boggling card trick
24 Padovan sequence
24 Percolation/Mean run density
24 Permutations/Rank of a permutation
24 Reverse the gender of a string
24 Shortest common supersequence
24 Show the (decimal) value of a number of 1s appended with a 3, then squared
24 Sokoban
24 Twin primes
24 Video display modes O O
23 Active Directory/Search for a user
23 Bioinformatics/Sequence mutation
23 Change e letters to i in words
23 Commatizing numbers
23 Create an object/Native demonstration
23 Deming's Funnel
23 Find duplicate files
23 Lucky and even lucky numbers
23 Main step of GOST 28147-89
23 Monads/List monad
23 Numbers in base 10 that are palindromic in bases 2, 4, and 16
23 Numbers with same digit set in base 10 and base 16
23 Piprimes
23 Pseudo-random numbers/Xorshift star
23 Record sound O
23 SOAP
23 Solve a Hopido puzzle
23 Solve a Numbrix puzzle
23 Spelling of ordinal numbers
22 15 puzzle solver
22 ASCII art diagram converter
22 Addition chains
22 Assertions in design by contract
22 Data Encryption Standard
22 Eertree
22 Esthetic numbers
22 Exponentiation with infix operators in (or operating on) the base
22 File size distribution
22 Find prime n for that reversed n is also prime
22 Kosaraju
22 Levenshtein distance/Alignment
22 Mastermind
22 Median filter
22 Merge and aggregate datasets
22 Montgomery reduction
22 Nested templated data
22 Numeric separator syntax
22 Orbital elements
22 Perceptron
22 Pig the dice game/Player
22 Polynomial synthetic division
22 Reflection/Get source O
22 Self numbers
22 Sunflower fractal
22 UPC
22 Vigenère cipher/Cryptanalysis
22 Vogel's approximation method
21 Bilinear interpolation
21 Bitcoin/public point to address
21 Changeable words
21 Cistercian numerals
21 Doomsday rule
21 Index finite lists of positive integers
21 Joystick position O
21 K-d tree
21 N-body problem
21 Native shebang
21 Odd words
21 Order by pair comparisons
21 Pancake numbers
21 Rare numbers
21 Readline interface
21 Sequence: nth number with exactly n divisors
21 Sierpinski arrowhead curve
21 Sum data type
21 Sylvester's sequence
21 Ulam numbers
21 Window management
21 Words from neighbour ones
20 Abelian sandpile model/Identity
20 Arithmetic coding/As a generalized change of radix
20 Compiler/code generator
20 Elementary cellular automaton/Infinite length
20 Find words which first and last three letters are equals
20 Knuth's power tree
20 Latin Squares in reduced form
20 Line circle intersection
20 Metallic ratios
20 Monads/Writer monad
20 Names to numbers
20 Neighbour primes
20 P-value correction
20 Primes - allocate descendants to their ancestors
20 Print debugging statement
20 Selective file copy
20 Simulate input/Mouse O
20 Smallest power of 6 whose decimal expansion contains n
20 Solve triangle solitare puzzle
20 Transportation problem
20 Word search
19 Calkin-Wilf sequence
19 Code segment unload
19 Color quantization
19 Common list elements
19 Compiler/virtual machine interpreter
19 Coprime triplets
19 Draw pixel 2
19 Erdős-primes
19 Find URI in text
19 Find words which contains all the vowels
19 Just in time processing on a character stream
19 Nonogram solver
19 Numbers in base-16 representation that cannot be written with decimal digits
19 Odd squarefree semiprimes
19 Percolation/Site percolation
19 Prime triplets
19 Prime words
19 Pseudo-random numbers/Combined recursive generator MRG32k3a
19 SQL-based authentication
19 Sleeping Beauty problem
19 Untrusted environment
19 Wieferich primes
19 Zeckendorf arithmetic
18 Biorhythms
18 Canonicalize CIDR
18 EKG sequence convergence
18 Find if a point is within a triangle
18 Free polyominoes enumeration
18 Imaginary base numbers
18 Matrix digital rain
18 Most frequent k chars distance
18 NYSIIS
18 Next special primes
18 Nimber arithmetic
18 Peaceful chess queen armies
18 Percolation/Mean cluster density
18 Self-hosting compiler
18 Separate the house number from the street name
18 Snake
18 Suffix tree
18 Tarjan
18 Vibrating rectangles
17 Banker's algorithm
17 Bitmap/Read an image through a pipe
17 Chernick's Carmichael numbers
17 Compiler/syntax analyzer
17 Cyclotomic polynomial
17 Find first missing positive
17 Geometric algebra
17 HTTPS/Client-authenticated
17 Logistic curve fitting in epidemiology
17 Padovan n-step number sequences
17 Palindromic primes
17 Particle swarm optimization
17 Percolation/Bond percolation
17 Practical numbers
17 Proof O O O O
17 Pseudo-random numbers/Splitmix64
17 Ramanujan's constant
17 Retrieve and search chat history
17 Special factorials
17 Terminal control/Positional read O
16 Aspect oriented programming
16 Bitmap/PPM conversion through a pipe
16 Compiler/AST interpreter
16 Consecutive Primes With Ascending Or Descending Differences
16 Cubic Special Primes
16 Find words which contains most consonants
16 Getting the number of decimals
16 Numbers n in which number 1 occur twice
16 Numerical integration/Adaptive Simpson's method
16 Print itself O
16 Quadrat Special Primes
16 Rendezvous O O
16 Singly-linked list/Element removal
16 Square root by hand
16 Substring primes
16 XML validation
15 Compare sorting algorithms' performance
15 Four is the number of letters in the ...
15 Functional coverage tree
15 Gradient descent
15 OpenWebNet password
15 Palindromic primes in base 16
15 Permutations with some identical elements
15 Prime numbers which contain 123
15 Sierpinski curve
15 Sine wave
15 Smallest numbers
15 Topological sort/Extracted top item
15 Unique characters
15 Unique characters in each string
14 Almkvist-Giullera formula for pi
14 Continued fraction/Arithmetic/G(matrix ng, continued fraction n)
14 Cyclops numbers
14 Deconvolution/2D+
14 Factorial base numbers indexing permutations of a collection
14 Generalised floating point addition
14 Jaro-Winkler distance
14 Modified random distribution
14 Numbers which count of divisors is prime
14 Pisano period
14 Prime numbers p which sum of prime numbers less or equal to p is prime
14 SHA-256 Merkle tree
14 Untouchable numbers
14 Word ladder
14 XXXX redacted
13 Air mass
13 Bioinformatics/Subsequence
13 Canny edge detector
13 Checksumcolor
13 Harmonic series
13 Interactive help
13 Launch rocket with countdown and acceleration in stdout
13 Longest palindromic substrings
13 Penrose tiling
13 Pentomino tiling
13 Run as a daemon or service
13 Sierpinski square curve
13 Simulated annealing
13 Sorting algorithms/Tree sort on a linked list
13 Three word location
13 Tree from nesting levels
13 Two bullet roulette
13 VList O
12 Audio frequency generator
12 Catmull–Clark subdivision surface
12 Execute CopyPasta Language
12 French Republican calendar
12 Geohash
12 Greed
12 Minimal steps down to 1
12 Minkowski question-mark function
12 Multi-base primes
12 Non-transitive dice
12 One-time pad
12 Pseudorandom number generator image
12 Railway circuit
12 Safe mode
12 Spoof game
12 Suffixation of decimal numbers
12 Tetris
12 Text completion
12 Time-based one-time password algorithm
12 Using a speech engine to highlight words
11 Combinations with repetitions/Square digit chain
11 Display an outline as a nested table
11 External sort
11 Graph colouring
11 Hourglass puzzle
11 Powerful numbers
11 Range modifications
11 Resistance calculator
11 Tree datastructures
11 Unit testing
10 Colour pinstripe/Printer O
10 Curve that touches three points
10 Distribution of 0 Digits in Factorial Series
10 Elliptic Curve Digital Signature Algorithm
10 Faces from a mesh
10 Fibonacci matrix-exponentiation
10 Longest substrings without repeating characters
10 Morpion solitaire
10 Numerical and alphabetical suffixes
10 Parse EBNF
10 Pinstripe/Printer O
10 Quoting constructs
10 Rosetta Code/Rank languages by number of users
10 Rosetta Code/Tasks without examples
10 Square Form Factorization
10 Starting a web browser
10 Text to HTML
9 16 puzzle game
9 Continued fraction/Arithmetic/G(matrix ng, continued fraction n1, continued fraction n2)
9 Count the coins/0-1
9 Fibonacci heap
9 Home primes
9 IPC via named pipe
9 Multidimensional Newton-Raphson method
9 OpenGL/Utah Teapot
9 Resistance network calculator
9 Sort an outline at every level
9 User defined pipe and redirection operators
9 War card game
8 Bioinformatics/global alignment
8 Brace expansion using ranges
8 Compiler/Verifying syntax
8 Discrete Fourier transform
8 Distinct Palindromes Within Decimal Numbers
8 Doubly-linked list/Element removal
8 Mayan calendar
8 Price list behind API
8 Robots
8 Tamagotchi emulator
8 Terminal control/Restricted width positional input/No wrapping
8 Terminal control/Restricted width positional input/With wrapping
7 Addition-chain exponentiation
7 I'm a software engineer, get me out of here
7 P-Adic numbers, basic
7 Random sentence from book
7 Recursive descent parser generator
7 Rosetta Code/Run examples
7 Smallest enclosing circle problem
7 URL shortener
7 Waveform analysis/Doh ray me
6 Audio overlap loop
6 Black Box
6 Chess player
6 Hexapawn
6 Latin Squares in reduced form/Randomizing using Jacobson and Matthews’ Technique
6 OpenGL pixel shader
6 Process SMIL directives in XML data
6 Remote agent/Agent logic
6 Remote agent/Simulation
6 Strassen's algorithm
5 Boids
5 Compiler/Simple file inclusion pre processor
5 Generalised floating point multiplication
5 OLE automation O O O
5 P-Adic square roots
5 Raster bars
5 Remote agent/Agent interface
5 Solve a Rubik's Cube
5 Unicode polynomial equation
5 Weather routing
5 WiktionaryDumps to words
4 Rosetta Code/List authors of task descriptions
4 Solving coin problems
4 Ukkonen’s suffix tree construction
4 Using the Meetup.com API
4 Waveform analysis/Top and tail
3 Blackjack strategy
3 Vidir
2 15 puzzle game in 3D
2 CLI-based maze-game
2 IRC gateway
0 Mine a bitcoin
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