Rosetta Code/Count examples/Full list/Tier 3

From Rosetta Code

Third 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
Third ten programming languages by number of task examples completed:
    ㉑ Sidef         ㉒ ALGOL_68      ㉓ 11l           ㉔ Zkl           ㉕ Factor       
    ㉖ D             ㉗ C_sharp       ㉘ Tcl           ㉙ Ada           ㉚ Rust         
As of 2024-06-01T22:21:58Z :: Tasks: 1272 :: Draft Tasks:403 :: Total Tasks: 1675 :: Total Examples: 96321
Count Task
594 Hello world/Text
384 FizzBuzz
381 99 bottles of beer
356 100 doors
310 Comments
310 Factorial
309 Fibonacci sequence
301 A+B
290 Empty program
263 Loops/Infinite
251 Reverse a string
249 Ackermann function
247 Arrays
244 Function definition
239 Loops/For
232 Loops/While
231 Conditional structures
224 Array concatenation
217 Arithmetic/Integer
213 Greatest element of a list
206 Even or odd
206 Greatest common divisor
204 Increment a numerical string
204 Repeat a string
204 Sieve of Eratosthenes
202 Array length
197 Averages/Arithmetic mean
197 Binary digits
197 Hello world/Graphical
196 Towers of Hanoi
194 Copy a string
193 String concatenation
191 Rot-13
190 Boolean values
190 Loops/Downward for
190 Sum and product of an array
188 Integer comparison
187 Apply a callback to an array
187 Character codes
187 Hello world/Newline omission
187 Palindrome detection
185 Integer sequence
185 Loops/For with a specified step
183 String length
181 String case
180 Tokenize a string
179 Loops/Foreach
179 Sum of a series
178 Loops/Break
177 Empty string
176 Quine
174 Logical operations
174 Sum of squares
173 Dot product
172 Filter
172 Hailstone sequence
169 Loops/Do-while
164 Loops/N plus one half
163 Generic swap
162 Associative array/Creation
162 Caesar cipher
161 Leap year
160 Sort an integer array
158 Determine if a string is numeric
158 Luhn test of credit card numbers
156 Generate lower case ASCII alphabet
156 System time
156 User input/Text
155 Command-line arguments
155 Execute a system command
155 Stack
154 Factors of an integer
154 Higher-order functions
153 ABC problem
153 Loops/Continue
153 Zero to the zero power
152 Hello world/Standard error
152 Sorting algorithms/Quicksort
151 Bitwise operations
151 Mutual recursion
150 Loop over multiple arrays simultaneously
150 Sorting algorithms/Bubble sort
149 Guess the number
149 Primality by trial division
148 Read entire file
147 Check that file exists
147 Remove duplicate elements
146 Create a file
146 Least common multiple
145 Balanced brackets
145 Count in octal
144 Ethiopian multiplication
144 Happy numbers
144 Roman numerals/Encode
144 Sleep
143 File input/output
142 Day of the week
142 Mandelbrot set
141 Program termination
140 Date format
140 Literals/String
140 Pascal's triangle
139 Count occurrences of a substring
139 Literals/Integer
139 Substring
139 Variables
136 Compound data type
136 Function composition
136 Knuth shuffle
136 Strip a set of characters from a string
135 N-queens problem
134 Loops/Nested
134 Sorting algorithms/Insertion sort
133 Babbage problem
133 Include a file
133 Letter frequency
133 Pick random element
131 Align columns
131 Averages/Median
131 Detect division by zero
131 Matrix transposition
131 Null object
131 String matching
130 File size
130 Look-and-say sequence
129 Averages/Root mean square
129 Flatten a list
129 Read a file line by line
129 Return multiple values
129 String append
128 Anagrams
128 Binary search
127 Associative array/Iteration
127 Delete a file
127 Guess the number/With feedback
127 Hash from two arrays
127 Matrix multiplication
126 Conway's Game of Life
126 Perfect numbers
125 Harshad or Niven series
125 Identity matrix
124 Find limit of recursion
124 Haversine formula
124 Input loop
123 Call a function
123 Case-sensitivity of identifiers
123 Environment variables
123 Roman numerals/Decode
123 Sierpinski triangle
122 Assertions
122 Comma quibbling
122 Levenshtein distance
121 Classes
121 Real constants and functions
120 Bulls and cows
120 Pangram checker
120 Run-length encoding
120 Search a list
120 String interpolation (included)
120 Substring/Top and tail
120 Variadic function
119 Arithmetic/Complex
118 HTTP
118 Rename a file
118 Sum multiples of 3 and 5
117 Formatted numeric output
117 Horner's rule for polynomial evaluation
117 Multiplication tables
117 Reverse words in a string
117 The Twelve Days of Christmas
116 Accumulator factory
116 Averages/Pythagorean means
116 Create a two-dimensional array at runtime
116 Evaluate binomial coefficients
116 Infinity
116 Strip whitespace from a string/Top and tail
115 Hostname
115 Ordered words
115 Program name
115 Sum digits of an integer
114 Anonymous recursion
114 Permutations
114 Sequence of non-squares
114 Temperature conversion
113 Digital root
113 Sorting algorithms/Merge sort
113 String prepend
113 Zig-zag matrix
112 Calculating the value of e
111 Amicable pairs
111 Catalan numbers
111 Combinations
111 Middle three digits
111 Queue/Definition
111 Trigonometric functions
110 24 game
110 Exceptions
110 Random numbers
109 Abundant, deficient and perfect number classifications
109 Evolutionary algorithm
109 Shell one-liner
109 Vector products
108 Arbitrary-precision integers (included)
108 Prime decomposition
108 Short-circuit evaluation
108 Time a function
107 Arithmetic-geometric mean
107 Hello world/Newbie
106 Enumerations
106 Symmetric difference
105 N'th
105 Regular expressions
105 Show ASCII table
105 Tree traversal
104 Power set
104 Sorting algorithms/Selection sort
103 Averages/Mode
103 Hofstadter Q sequence
103 Walk a directory/Non-recursively
102 Collections
102 Exponentiation operator
102 Floyd's triangle
102 Hamming numbers
102 Map range
101 Create an HTML table
101 Execute Brain****
101 Interactive programming (repl) O O O
101 Nth root
101 Range expansion
101 Y combinator O
100 Entropy
100 Sort using a custom comparator
100 String comparison
99 First-class functions
99 MD5
99 Modular inverse
99 Number reversal game
99 Sorting algorithms/Cocktail sort
98 Address of a variable O O
98 Catamorphism
98 Gray code
98 Random number generator (included)
98 Sorting algorithms/Bogosort
97 Compare a list of strings
97 Langton's ant
97 Monty Hall problem
97 Range extraction
97 Sierpinski carpet
97 Sorting algorithms/Heapsort
97 Split a character string based on change of character
96 Forward difference
96 Last Friday of each month
96 Menu
96 Repeat
96 Sorting algorithms/Gnome sort
95 Abstract type O O
95 Averages/Simple moving average
95 CSV data manipulation
95 Inheritance/Single O
95 JSON
95 Number names
95 One-dimensional cellular automata
95 Terminal control/Clear the screen
94 Almost prime
94 Cumulative standard deviation
94 Greatest subsequential sum
94 Munchausen numbers
93 Anti-primes
93 Box the compass
93 Count in factors
93 Five weekends
93 Population count
93 Simple windowed application
92 Additive primes
92 Department numbers
92 Literals/Floating point
92 Multifactorial
92 Non-decimal radices/Convert
91 Count the coins
91 Set
90 CSV to HTML translation
90 Find common directory path
90 Find the last Sunday of each month
90 Hello world/Line printer
90 Long multiplication
90 Operator precedence
90 Order two numerical lists
90 Playing cards
90 Queue/Usage
90 Thue-Morse
90 URL decoding
90 Window creation
89 CRC-32
89 Price fraction
89 SEDOLs
89 Sort an array of composite structures
89 Word wrap
88 100 prisoners
88 Benford's law
88 Bitmap
88 Here document
88 Josephus problem
88 Proper divisors
88 Strip comments from a string
88 Terminal control/Ringing the terminal bell
88 Top rank per group
88 Walk a directory/Recursively
87 15 puzzle game
87 Closures/Value capture
87 Introspection
87 Read a specific line from a file
87 URL encoding
86 Angle difference between two bearings
86 Attractive numbers
86 Call an object method
86 Dynamic variable names O O O
86 File modification time
86 Jump anywhere
86 Knapsack problem/0-1
86 Lucas-Lehmer test
86 Pi
86 Pythagorean triples
86 Singly-linked list/Traversal
86 Spiral matrix
86 Take notes on the command line
85 Convert seconds to compound duration
85 Extend your language O
85 Find the missing permutation
85 Priority queue
85 Show the epoch
85 Sorting algorithms/Shell sort
84 Fibonacci n-step number sequences
84 Kaprekar numbers
84 Monte Carlo methods
84 Rep-string
84 Sockets
84 Sorting algorithms/Counting sort
83 Date manipulation
83 Dragon curve
83 Gamma function
83 Keyboard input/Obtain a Y or N response
83 Linear congruential generator
83 Man or boy test
83 Old lady swallowed a fly
83 Pernicious numbers
83 Sequence of primes by trial division
83 Soundex
83 Special characters
83 XML/Input
82 Animation
82 Calendar
82 Call a foreign-language function
82 Concurrent computing
82 Currying
82 Equilibrium index
82 Jewels and stones
82 Quaternion type
82 Semordnilap
82 Sort disjoint sublist
82 Unicode variable names
82 Web scraping
82 Write entire file
81 Anagrams/Deranged anagrams
81 Empty directory
81 Flow-control structures
81 Jensen's Device
81 Rock-paper-scissors
81 Singly-linked list/Element definition
81 Sorting algorithms/Comb sort
81 Vigenère cipher
81 Zeckendorf number representation
80 AKS test for primes
80 Averages/Mean angle
80 Euler method
80 Exponentiation order
80 Fractal tree
80 Guess the number/With feedback (player)
80 Narcissistic decimal number
79 Chinese remainder theorem
79 Draw a sphere
79 Four bit adder
79 General FizzBuzz
79 Hello world/Web server
79 ISBN13 check digit
79 List comprehensions
79 Maze generation
79 Non-decimal radices/Output
79 SHA-1
79 Sort three variables
79 Square but not cube
79 Sudoku
79 Van Eck sequence
78 Damm algorithm
78 Execute HQ9+
78 I before E except after C
78 McNuggets problem
78 Read a configuration file
78 Semiprime
78 Stern-Brocot sequence
77 Bitmap/Bresenham's line algorithm
77 Catalan numbers/Pascal's triangle
77 Enforced immutability
77 Largest int from concatenated ints
77 Phrase reversals
77 Roots of unity
77 Self-describing numbers
77 Sorting algorithms/Stooge sort
77 Unix/ls
77 Van der Corput sequence
77 Write float arrays to a text file
77 Yin and yang
76 Combinations with repetitions
76 Exceptions/Catch an exception thrown in a nested call
76 Multiple distinct objects
76 Stair-climbing puzzle
76 Trabb Pardo–Knuth algorithm
75 Constrained random points on a circle
75 Magic 8-ball
75 Parsing/RPN calculator algorithm
75 SHA-256
75 Special variables
75 Strip control codes and extended characters from a string
74 4-rings or 4-squares puzzle
74 Amb
74 Continued fraction
74 Longest common subsequence
74 Nested function
74 Numerical integration
74 Polymorphism
74 Runtime evaluation O O
73 Barnsley fern
73 Closest-pair problem
73 Determine if a string is collapsible
73 Isqrt (integer square root) of X
73 Magic squares of odd order
73 Named parameters O O O
73 Probabilistic choice
73 Tau function
73 Variable size/Get
72 Abundant odd numbers
72 Arithmetic/Rational
72 Compile-time calculation
72 Fast Fourier transform
72 Get system command output
72 IBAN
72 Leonardo numbers
72 Morse code
72 RPG attributes generator
72 Smith numbers
72 Sorting algorithms/Pancake sort
72 Subleq
72 Text processing/Max licenses in use
72 Word frequency
71 Best shuffle
71 Chinese zodiac
71 Circles of given radius through two points
71 Disarium numbers
71 Dutch national flag problem
71 Euler's sum of powers conjecture
71 Extract file extension
71 Modular exponentiation
71 One of n lines in a file
71 Primality by Wilson's theorem
71 Roots of a function
71 Singly-linked list/Element insertion
71 Two identical strings
71 Two sum
70 Binary strings
70 Cartesian product of two or more lists
70 Emirp primes
70 Factors of a Mersenne number
70 Host introspection
70 Long year
70 Memory allocation
70 Reduced row echelon form
70 Remove lines from a file
70 Sort stability
70 Write language name in 3D ASCII
69 Animate a pendulum
69 Arithmetic evaluation
69 Base64 decode data
69 CUSIP
69 Cholesky decomposition
69 Determine if a string has all the same characters
69 Documentation
69 Draw a clock
69 Draw a cuboid
69 Draw a pixel
69 Fork
69 Integer overflow
69 Mouse position
69 Non-decimal radices/Input
69 Remove vowels from a string
69 Runge-Kutta method
68 9 billion names of God the integer
68 Hofstadter-Conway $10,000 sequence
68 Longest common substring
68 Miller–Rabin primality test
68 Plot coordinate pairs
68 Roots of a quadratic function
68 Sorting algorithms/Sleep sort
68 Tic-tac-toe
68 Undefined values
68 XML/Output
67 Averages/Mean time of day
67 Base64 encode data
67 Cantor set
67 Copy stdin to stdout
67 FASTA format
67 Globally replace text in several files
67 HTTPS
67 Longest common prefix
67 Optional parameters
67 Pascal matrix generation
67 Quickselect algorithm
67 Tau number
67 Ternary logic
67 Test a function
67 Vector
66 Farey sequence
66 Gapful numbers
66 Inheritance/Multiple
66 Knight's tour
66 Ludic numbers
66 Maximum triangle path sum
66 Terminal control/Display an extended character
66 Totient function
65 2048
65 Bitmap/Write a PPM file
65 JortSort
65 Knapsack problem/Continuous
65 Knapsack problem/Unbounded
65 Truncatable primes
65 Unicode strings
64 24 game/Solve
64 Brownian tree
64 Code Golf: Code Golf
64 DNS query
64 Days between dates
64 Discordian date
64 Fibonacci word
64 Fusc sequence
64 Generator/Exponential
64 Huffman coding
64 Loops/Increment loop index within loop body
64 Nim game
64 Sum of first n cubes
63 Add a variable to a class instance at runtime O O O
63 Archimedean spiral
63 Convert decimal number to rational
63 Horizontal sundial calculations
63 Left factorials
63 Odd word problem
63 Partial function application
63 Sattolo cycle
63 Smallest square that begins with n
63 Sum of divisors
62 Dijkstra's algorithm
62 Dinesman's multiple-dwelling problem
62 Grayscale image
62 Iterated digits squaring
62 Kernighans large earthquake problem
62 LZW compression
62 Mad Libs
62 Matrix-exponentiation operator
62 Random number generator (device)
62 Sort numbers lexicographically
62 Terminal control/Coloured text
62 Truncate a file
62 Validate International Securities Identification Number
61 Deal cards for FreeCell
61 Define a primitive data type
61 Doubly-linked list/Element definition
61 Find the intersection of two lines
61 Hash join
61 Largest proper divisor of n
61 Loops/With multiple ranges
61 Multisplit
61 Pig the dice game
61 Pointers and references
61 Scope modifiers
61 Sorting algorithms/Bead sort
61 Topological sort
61 Unbias a random generator
61 User input/Graphical
61 Words containing "the" substring
60 Abbreviations, automatic
60 Bell numbers
60 Bernoulli numbers
60 Compare length of two strings
60 Extreme floating point values
60 Inverted syntax O
60 Keyboard input/Keypress check
60 Perfect shuffle
60 Runtime evaluation/In an environment O O
60 Shoelace formula for polygonal area
60 Sierpinski triangle/Graphical
60 Singleton
60 Stem-and-leaf plot
59 Call a function in a shared library
59 Chaos game
59 Delegates
59 First-class functions/Use numbers analogously
59 Forest fire
59 Holidays related to Easter
59 Password generator
59 Perfect totient numbers
59 Rosetta Code/Rank languages by popularity
59 Sorting algorithms/Permutation sort
59 Tokenize a string with escaping
59 Universal Turing machine
58 Egyptian division
58 Halt and catch fire
58 Handle a signal
58 Hofstadter Figure-Figure sequences
58 Kronecker product
58 Modulinos O
58 Rate counter
58 Recaman's sequence
58 Search a list of records
58 Seven-sided dice from five-sided dice
58 Stack traces
58 Statistics/Basic
58 Wireworld
58 XML/XPath
57 Associative array/Merging
57 Bioinformatics/base count
57 Determine if a string has all unique characters
57 Fractran
57 Generate Chess960 starting position
57 Heronian triangles
57 Longest string challenge
57 Naming conventions
57 Non-continuous subsequences
57 Polynomial regression
57 Strange plus numbers
57 Water collected between towers
56 Extensible prime generator
56 Gaussian elimination
56 Jaro similarity
56 Longest increasing subsequence
56 Move-to-front algorithm
56 Send email O
56 Set consolidation
56 Strip block comments
56 Ulam spiral (for primes)
56 XML/DOM serialization
55 Average loop length
55 Casting out nines
55 Execute a Markov algorithm
55 Mertens function
55 Munching squares
55 Odd and square numbers
55 Spinning rod animation/Text
55 Sum of the digits of n is substring of n
55 Synchronous concurrency
55 Terminal control/Cursor positioning
55 Text processing/2
54 21 game
54 Aliquot sequence classifications
54 Convex hull
54 Determinant and permanent
54 Determine if a string is squeezable
54 Digital root/Multiplicative digital root
54 Doubly-linked list/Element insertion
54 Elementary cellular automaton
54 Greyscale bars/Display
54 Hilbert curve
54 Idiomatically determine all the lowercase and uppercase letters
54 Musical scale
54 Substitution cipher
54 Text between
54 The Name Game
54 Zebra puzzle
53 Append a record to the end of a text file
53 Chowla numbers
53 Currency
53 Dining philosophers
53 Doubly-linked list/Traversal
53 Image noise
53 MAC vendor lookup
53 Make directory path
53 Matrix with two diagonals
53 Numbers divisible by their individual digits, but not by the product of their digits.
52 ABC words
52 Find words which contains more than 3 e vowels
52 Floyd-Warshall algorithm
52 GUI component interaction
52 Metaprogramming O
52 Polynomial long division
52 Problem of Apollonius
52 Respond to an unknown method call O O
52 Stable marriage problem
52 Start from a main routine O O O
52 Text processing/1
51 Abbreviations, easy
51 Bitmap/Flood fill
51 Colour bars/Display
51 Colour pinstripe/Display
51 Doubly-linked list/Definition
51 History variables
51 Last letter-first letter
51 Permutations/Derangements
51 Polymorphic copy
51 Send an unknown method call O O
51 Strange numbers
51 Taxicab numbers
51 Variable size/Set
51 Verify distribution uniformity/Naive
50 Approximate equality
50 Bitmap/Midpoint circle algorithm
50 Bitmap/Read a PPM file
50 Brazilian numbers
50 Combinations and permutations
50 Coprimes
50 Humble numbers
50 Lah numbers
50 Nice primes
50 Sequence: smallest number with exactly n divisors
50 Sorting Algorithms/Circle Sort
50 Sorting algorithms/Radix sort
50 Sparkline in unicode
50 Sum to 100
50 Twelve statements
50 UTF-8 encode and decode
50 Visualize a tree
49 10001th prime
49 Active object
49 Deepcopy
49 Display a linear combination
49 Element-wise operations
49 File extension is in extensions list
49 Find prime n such that reversed n is also prime
49 Find square difference
49 Magnanimous numbers
49 Narcissist
49 OpenGL
49 Parsing/Shunting-yard algorithm
49 Permutations by swapping
49 Product of divisors
49 Shift list elements to left by 3
49 Show the (decimal) value of a number of 1s appended with a 3, then squared
49 Special divisors
48 Balanced ternary
48 Bulls and cows/Player
48 Color of a screen pixel
48 Continued fraction/Arithmetic/Construct from rational number
48 Count how many vowels and consonants occur in a string
48 Determine if only one instance is running
48 Feigenbaum constant calculation
48 Fivenum
48 Flipping bits game
48 GUI/Maximum window dimensions
48 Golden ratio/Convergence
48 Input/Output for pairs of numbers
48 Julia set
48 Long primes
48 Loops/Wrong ranges
48 Palindrome dates
48 Pseudo-random numbers/Middle-square method
48 Secure temporary file
48 Speech synthesis O
48 Steady squares
48 Subtractive generator
48 Sudan function
48 Truth table
48 Yellowstone sequence
47 Ascending primes
47 Base 16 numbers needing a to f
47 Echo server
47 Extra primes
47 Factorions
47 Find words which contains all the vowels
47 Keyboard input/Flush the keyboard buffer
47 Knapsack problem/Bounded
47 Largest number divisible by its digits
47 Mersenne primes
47 Pythagorean quadruples
47 Sailors, coconuts and a monkey problem
47 Sort a list of object identifiers
47 Sutherland-Hodgman polygon clipping
47 Table creation/Postal addresses
47 Terminal control/Dimensions
47 Triplet of three numbers
47 Type detection
46 Abbreviations, simple
46 Arithmetic numbers
46 Arithmetic-geometric mean/Calculate Pi
46 Atomic updates
46 Carmichael 3 strong pseudoprimes
46 Compiler/lexical analyzer
46 Find prime numbers of the form n*n*n+2
46 Find the intersection of a line with a plane
46 Hickerson series of almost integers
46 Integer roots
46 Koch curve
46 Pascal's triangle/Puzzle
46 Permutations with repetitions
46 Primorial numbers
46 Rosetta Code/Count examples
46 Safe primes and unsafe primes
46 Sequence: smallest number greater than previous term with exactly n divisors
46 Sorting algorithms/Patience sort
46 Unique characters
45 Cheryl's birthday
45 Church numerals
45 Cramer's rule
45 Cycle detection
45 Digit fifth powers
45 Eban numbers
45 Euler's identity
45 Fairshare between two and more
45 Find squares n where n+1 is prime
45 First 9 prime Fibonacci number
45 Four is magic
45 Frobenius numbers
45 MD5/Implementation
45 Numerical integration/Adaptive Simpson's method
45 Primes whose sum of digits is 25
45 Ranking methods
45 Read a file character by character/UTF8
45 S-expressions
45 Scope/Function names and labels
45 Terminal control/Hiding the cursor
45 Variable-length quantity
45 Voronoi diagram
44 Brace expansion
44 Chaocipher
44 Cuban primes
44 Find words whose first and last three letters are equal
44 Function prototype O
44 Input/Output for lines of text
44 Kahan summation
44 Magic squares of doubly even order
44 Modular arithmetic
44 Numbers with prime digits whose sum is 13
44 Partition an integer x into n primes
44 Percentage difference between images
44 Prime conspiracy
44 Sort the letters of string in alphabetical order
44 Sorting algorithms/Strand sort
44 Sum of elements below main diagonal of matrix
44 Summarize and say sequence
44 Terminal control/Inverse video
44 Test integerness
44 Topswops
44 Vampire number
43 Bitwise IO
43 Calendar - for "REAL" programmers O O
43 Cousin primes
43 Find palindromic numbers in both binary and ternary bases
43 GUI enabling/disabling of controls
43 Implicit type conversion
43 Inverted index
43 Knuth's algorithm S
43 Metronome
43 Parallel calculations
43 Parametric polymorphism O O O
43 Pathological floating point problems
43 Penney's game
43 Pythagoras tree
43 Ray-casting algorithm
43 Statistics/Normal distribution
43 Xiaolin Wu's line algorithm
42 Bitmap/Bézier curves/Cubic
42 Circular primes
42 Dice game probabilities
42 Fibonacci word/fractal
42 Length of an arc between two angles
42 Longest common suffix
42 Maze solving
42 Multi-dimensional array
42 Multiple regression
42 Numbers in base-16 representation that cannot be written with decimal digits
42 Numbers whose binary and ternary digit sums are prime
42 Numbers with same digit set in base 10 and base 16
42 Old Russian measure of length
42 Permutation test
42 Pinstripe/Display
42 QR decomposition
42 Rosetta Code/Find bare lang tags
42 Solve the no connection puzzle
41 Alternade words
41 Apply a digital filter (direct form II transposed)
41 Canonicalize CIDR
41 Constrained genericity O O O
41 Create a file on magnetic tape O O
41 Determine if two triangles overlap
41 Diversity prediction theorem
41 Draw a rotating cube
41 Entropy/Narcissist
41 Events
41 Find words with alternating vowels and consonants
41 Harmonic series
41 LU decomposition
41 Lychrel numbers
41 Machine code
41 Metered concurrency
41 Minimum multiple of m where digital sum equals m
41 Minimum number of cells after, before, above and below NxN squares
41 Möbius function
41 Numerical integration/Gauss-Legendre Quadrature
41 O'Halloran numbers
41 Parsing/RPN to infix conversion
41 Perlin noise
41 Positive decimal integers with the digit 1 occurring exactly twice
41 Smarandache prime-digital sequence
41 Strange unique prime triplets
41 Successive prime differences
40 AVL tree
40 Abelian sandpile model
40 Break OO privacy O
40 Calkin-Wilf sequence
40 Change e letters to i in words
40 Check output device is a terminal
40 Common list elements
40 Deceptive numbers
40 Doomsday rule
40 Find first missing positive
40 Find if a point is within a triangle
40 Find minimum number of coins that make a given value
40 First power of 2 that has leading decimal digits of 12
40 Maximum difference between adjacent elements of list
40 Mosaic matrix
40 Motzkin numbers
40 Negative base numbers
40 Numbers with equal rises and falls
40 Object serialization
40 Poker hand analyser
40 Polyspiral
40 Square-free integers
40 Strong and weak primes
40 Word wheel
40 Zumkeller numbers
39 Algebraic data types O
39 Angles (geometric), normalization and conversion
39 Append numbers at same position in strings
39 Bitmap/Bézier curves/Quadratic
39 Common sorted list
39 Conjugate transpose
39 Create an object at a given address O
39 Esthetic numbers
39 Find first and last set bit of a long integer
39 Gauss-Jordan matrix inversion
39 Jacobi symbol
39 Minesweeper game
39 Multiline shebang
39 Mutex O
39 Neighbour primes
39 Numbers in base 10 that are palindromic in bases 2, 4, and 16
39 Order disjoint list items
39 Parse command-line arguments
39 Peano curve
39 RIPEMD-160
39 RSA code
39 Safe and Sophie Germain primes
39 Set puzzle
39 Subset sum problem
39 Superellipse
39 Terminal control/Unicode output
39 Textonyms
39 Twin primes
38 Burrows–Wheeler transform
38 Erdős-primes
38 Faulhaber's triangle
38 First perfect square in base n with n unique digits
38 Four sides of square
38 Greedy algorithm for Egyptian fractions
38 Jacobsthal numbers
38 MD4
38 Minimum numbers of three lists
38 Ordered partitions
38 Padovan sequence
38 Pentagram
38 Pragmatic directives
38 Sorting algorithms/Cycle sort
38 Sum and product puzzle
38 Summarize primes
38 Unique characters in each string
38 Weird numbers
37 Bacon cipher
37 Bin given limits
37 Biorhythms
37 Color wheel
37 Death Star
37 Decimal floating point number to binary
37 Find words which contain the most consonants
37 Galton box animation
37 Generate random numbers without repeating a value
37 Giuga numbers
37 Mayan numerals
37 Pell's equation
37 Product of min and max prime factors
37 Pseudo-random numbers/PCG32
37 Rosetta Code/Find unimplemented tasks
37 Sexy primes
37 Sylvester's sequence
37 Terminal control/Cursor movement
37 Terminal control/Preserve screen
37 Wieferich primes
37 Words from neighbour ones
36 Chebyshev coefficients
36 Chemical calculator
36 Cullen and Woodall numbers
36 Day of the week of Christmas and New Year
36 Deconvolution/1D
36 Descending primes
36 Exactly three adjacent 3 in lists
36 Faulhaber's formula
36 Largest prime factor
36 Law of cosines - triples
36 Long literals, with continuations
36 Mian-Chowla sequence
36 Next highest int from digits
36 Numbers which are the cube roots of the product of their proper divisors
36 Partition function P
36 Primes with digits in nondecreasing order
36 Random Latin squares
36 Reflection/List properties O
36 Solve a Hidato puzzle
36 Super-d numbers
36 URL parser
35 Bitmap/Histogram
35 Check input device is a terminal
35 Decision tables
35 Distinct power numbers
35 FTP
35 Increasing gaps between consecutive Niven numbers
35 Klarner-Rado sequence
35 Memory layout of a data structure
35 Mind boggling card trick
35 Minimum positive multiple in base 10 using only 0 and 1
35 Monads/Maybe monad
35 Multiplicative order
35 Odd squarefree semiprimes
35 Odd words
35 Parallel brute force
35 Parameterized SQL statement O
35 Pierpont primes
35 Prime numbers which contain 123
35 Resistor mesh
35 Set of real numbers
35 Sierpinski arrowhead curve
35 Simple database
35 Sleeping Beauty problem
35 Stirling numbers of the first kind
35 Stirling numbers of the second kind
35 Straddling checkerboard
35 Topic variable O O O
35 Unprimeable numbers
35 Use another language to call a function
35 Verify distribution uniformity/Chi-squared test
35 Window creation/X11
35 Word break problem
34 Bioinformatics/Sequence mutation
34 Bitcoin/address validation
34 Deming's funnel
34 Duffinian numbers
34 Euler's constant 0.5772...
34 Executable library
34 Execute SNUSP
34 Finite state machine
34 Honaker primes
34 Hunt the Wumpus
34 Largest five adjacent number
34 Last list item
34 N-smooth numbers
34 Piprimes
34 Prime triplets
34 Range consolidation
34 Riordan numbers
34 Summation of primes
34 Total circles area
34 Video display modes O O
34 Write to Windows event log
34 Zhang-Suen thinning algorithm
33 Almkvist-Giullera formula for pi
33 Checkpoint synchronization
33 Cistercian numerals
33 Compiler/virtual machine interpreter
33 Concatenate two primes is also prime
33 Curzon numbers
33 Cut a rectangle
33 De Bruijn sequences
33 First class environments O
33 Generate random chess position
33 Go Fish
33 HTTPS/Authenticated
33 Idiomatically determine all the characters that can be used for symbols
33 Kronecker product based fractals
33 Legendre prime counting function
33 Palindromic primes
33 Plasma effect
33 Ramer-Douglas-Peucker line simplification
33 Sierpinski pentagon
33 Sorting algorithms/Cocktail sort with shifting bounds
33 Sum of primes in odd positions is prime
33 Sum of square and cube digits of an integer are primes
32 Arena storage pool
32 Changeable words
32 Chat server
32 Factorial primes
32 Fermat numbers
32 Honeycombs
32 Keyboard macros
32 Merge and aggregate datasets
32 Nonoblock
32 Numbers whose count of divisors is prime
32 Numeric error propagation
32 Own digits power sum
32 Ramsey's theorem
32 Reflection/List methods O
32 Reverse the order of lines in a text file while preserving the contents of each line
32 Rosetta Code/Fix code tags
32 Selectively replace multiple instances of a character within a string
32 Smallest multiple
32 State name puzzle
32 Stream merge
32 Sunflower fractal
32 Table creation
31 A* search algorithm
31 Anadromes
31 Birthday problem
31 Check Machin-like formulas
31 Collect and sort square numbers in ascending order from three lists
31 De Polignac numbers
31 Find adjacent primes which differ by a square integer
31 Formal power series
31 Idoneal numbers
31 Monads/List monad
31 Numeric separator syntax
31 Play recorded sounds
31 Prime words
31 Pseudo-random numbers/Splitmix64
31 Quadrat special primes
31 Safe addition
31 Shortest common supersequence
31 Snake and ladder
31 Special neighbor primes
31 Spelling of ordinal numbers
31 Teacup rim text
31 The ISAAC cipher
31 Tonelli-Shanks algorithm
31 Update a configuration file
31 Wordle comparison
30 Active Directory/Connect
30 Audio alarm
30 Consecutive primes with ascending or descending differences
30 Cyclops numbers
30 Decorate-sort-undecorate idiom
30 Determine sentence type
30 Euclidean rhythm
30 Find largest left truncatable prime in a given base
30 Fixed length records
30 Function frequency
30 Longest substrings without repeating characters
30 Magic constant
30 Magic squares of singly even order
30 N-grams
30 Natural sorting
30 Next special primes
30 Orbital elements
30 Order by pair comparisons
30 Palindromic gapful numbers
30 Percolation/Mean run density
30 Same fringe
30 Smallest power of 6 whose decimal expansion contains n
30 Sum of two adjacent numbers are primes
30 Superpermutation minimisation
30 Thiele's interpolation formula
30 UPC
30 Ulam numbers
29 Base58Check encoding
29 Brilliant numbers
29 Calmo numbers
29 Card shuffles
29 Continued fraction/Arithmetic/G(matrix ng, continued fraction n)
29 Coprime triplets
29 Cubic special primes
29 EKG sequence convergence
29 Exponentiation with infix operators in (or operating on) the base
29 Fraction reduction
29 Hex words
29 Intersecting number wheels
29 Largest difference between adjacent primes
29 Levenshtein distance/Alignment
29 Make a backup file
29 Matrix chain multiplication
29 Nautical bell
29 Padovan n-step number sequences
29 Palindromic primes in base 16
29 Paraffins
29 Parse an IP Address
29 Permutations/Rank of a permutation
29 Permuted multiples
29 Primes which contain only one odd digit
29 Primes whose first and last number is 3
29 Rare numbers
29 Record sound O
29 Self numbers
29 Sequence of primorial primes
29 Soloway's recurring rainfall
29 Solve a Holy Knight's tour
29 Two's complement
29 Welch's t-test
29 Wilson primes of order n
29 World Cup group stage
28 Abelian sandpile model/Identity
28 Blum integer
28 Cipolla's algorithm
28 Colorful numbers
28 Distributed programming
28 Elementary cellular automaton/Random number generator
28 Elliptic curve arithmetic
28 Euclid-Mullin sequence
28 File size distribution
28 Getting the number of decimal places
28 Image convolution
28 K-means++ clustering
28 Linux CPU utilization
28 Lucky and even lucky numbers
28 Playfair cipher
28 Print itself O
28 Pseudo-random numbers/Xorshift star
28 Round-robin tournament schedule
28 Snake
28 The sieve of Sundaram
28 Wagstaff primes
28 Yahoo! search interface
27 15 puzzle solver
27 Achilles numbers
27 Camel case and snake case
27 Commatizing numbers
27 Composite numbers k with no single digit factors whose factors are all substrings of k
27 Kolakoski sequence
27 Kosaraju
27 Largest product in a grid
27 Main step of GOST 28147-89
27 Markov chain text generator
27 Pisano period
27 RCRPG
27 Reverse the gender of a string
27 Sierpinski curve
27 Simulate input/Keyboard O
27 Solve a Numbrix puzzle
27 Solve triangle solitaire puzzle
27 Sort primes from list to a list
27 Special factorials
27 Zeckendorf arithmetic
26 ASCII art diagram converter
26 Assertions in design by contract
26 Goldbach's comet
26 Hough transform
26 Inconsummate numbers in base 10
26 Index finite lists of positive integers
26 List rooted trees
26 Mastermind
26 Monads/Writer monad
26 Nested templated data
26 Ormiston pairs
26 Pancake numbers
26 Periodic table
26 Prime numbers p for which the sum of primes less than or equal to p is prime
26 Print debugging statement
26 Sine wave
26 Sphenic numbers
26 Substring primes
26 Sum data type
25 Active Directory/Search for a user
25 Arithmetic derivative
25 Continued fraction/Arithmetic/G(matrix ng, continued fraction n1, continued fraction n2)
25 Eertree
25 Find duplicate files
25 Joystick position O O
25 Matrix digital rain
25 Median filter
25 Metallic ratios
25 Minimum primes
25 Modified random distribution
25 N-body problem
25 Native shebang
25 Pandigital prime
25 Perceptron
25 Permutations with some identical elements
25 Practical numbers
25 Radical of an integer
25 Reflection/Get source O
25 SOAP
25 Sequence: nth number with exactly n divisors
25 Set right-adjacent bits
25 Sierpinski square curve
25 Solve a Hopido puzzle
25 Untrusted environment
25 Variable declaration reset
25 Vibrating rectangles
24 Addition chains
24 Air mass
24 Bilinear interpolation
24 Bitcoin/public point to address
24 Compiler/code generator
24 Compiler/syntax analyzer
24 Conjugate a Latin verb
24 Create an object/Native demonstration
24 Erdős-Nicolas numbers
24 Juggler sequence
24 K-d tree
24 Largest palindrome product
24 Line circle intersection
24 Meissel–Mertens constant
24 Peaceful chess queen armies
24 Polynomial synthetic division
24 Quoting constructs
24 Singly-linked list/Element removal
24 Sokoban
24 Vigenère cipher/Cryptanalysis
23 Bifid cipher
23 Double Twin Primes
23 Draw pixel 2
23 Elementary cellular automaton/Infinite length
23 Fortunate numbers
23 Jordan-Pólya numbers
23 Knuth's power tree
23 Latin Squares in reduced form
23 Long stairs
23 Montgomery reduction
23 Names to numbers
23 Nonogram solver
23 Numbers which are not the sum of distinct squares
23 Pairs with common factors
23 Percolation/Site percolation
23 Pig the dice game/Player
23 Smallest numbers
23 Special pythagorean triplet
23 Sub-unit squares
23 Two bullet roulette
23 Useless instructions
23 Vogel's approximation method
22 Compare sorting algorithms' performance
22 Cyclotomic polynomial
22 Data Encryption Standard
22 Equal prime and composite sums
22 Iccanobif primes
22 Imaginary base numbers
22 Logistic curve fitting in epidemiology
22 Nimber arithmetic
22 Percolation/Mean cluster density
22 Primes - allocate descendants to their ancestors
22 Pseudo-random numbers/Combined recursive generator MRG32k3a
22 Safe mode
22 Selective file copy
22 Separate the house number from the street name
22 Simulate input/Mouse O
22 Tarjan
22 Window management
21 Arithmetic coding/As a generalized change of radix
21 Aspect oriented programming
21 Bézier curves/Intersections
21 Color quantization
21 HTTPS/Client-authenticated
21 Jaro-Winkler distance
21 Just in time processing on a character stream
21 Longest palindromic substrings
21 Multiplicatively perfect numbers
21 Pell numbers
21 Penrose tiling
21 Pseudorandom number generator image
21 Readline interface
21 Repunit primes
21 Rhonda numbers
21 Ruth-Aaron numbers
21 Self-hosting compiler
21 Simulated annealing
21 Transportation problem
21 Tree from nesting levels
21 Upside-down numbers
21 Word ladder
21 XML validation
20 Bitmap/Read an image through a pipe
20 Code segment unload
20 Compiler/AST interpreter
20 Distribution of 0 digits in factorial series
20 Execute Computer/Zero
20 Minimal steps down to 1
20 Most frequent k chars distance
20 OpenWebNet password
20 Ormiston triples
20 P-value correction
20 Penta-power prime seeds
20 Prime triangle
20 Primes: n*2^m+1
20 Proof O O
20 Retrieve and search chat history
20 SEND + MORE = MONEY
20 SQL-based authentication
20 Square root by hand
20 Steffensen's method
20 Terminal control/Positional read O
20 Three word location
20 Ultra useful primes
20 Wolstenholme numbers
19 Banker's algorithm
19 Bernstein basis polynomials
19 Bitmap/PPM conversion through a pipe
19 CalmoSoft primes
19 Chernick's Carmichael numbers
19 Curve that touches three points
19 Earliest difference between prime gaps
19 Find URI in text
19 Forbidden numbers
19 Free polyominoes enumeration
19 Geohash
19 Gradient descent
19 Home primes
19 Minkowski question-mark function
19 Percolation/Bond percolation
19 Quad-power prime seeds
19 SHA-256 Merkle tree
19 VList O
18 Binary coded decimal
18 Bioinformatics/Subsequence
18 Even numbers which cannot be expressed as the sum of two twin primes
18 Extreme primes
18 Geometric algebra
18 Jaccard index
18 NYSIIS
18 Non-transitive dice
18 Pan base non-primes
18 Particle swarm optimization
18 Polynomial derivative
18 Ramanujan primes
18 Ramanujan's constant
18 Rendezvous
18 Sorting algorithms/Tree sort on a linked list
18 Square form factorization
18 Suffix tree
18 Topological sort/Extracted top item
18 Triangular numbers
18 Tropical algebra overloading
18 Walsh matrix
18 War card game
18 Word search
18 XXXX redacted
18 Zsigmondy numbers
17 ADFGVX cipher
17 Audio frequency generator
17 Boustrophedon transform
17 CORDIC
17 Canny edge detector
17 Find Chess960 starting position identifier
17 Four is the number of letters in the ...
17 Gotchas
17 Iterators
17 Multi-base primes
17 Overloaded operators
17 Pentomino tiling
17 Rodrigues’ rotation formula
17 Solve hanging lantern problem
17 Tetris
17 Unit testing
17 Untouchable numbers
17 Verhoeff algorithm
16 Boyer-Moore string search
16 Count the coins/0-1
16 Distance and Bearing
16 Erdös-Selfridge categorization of primes
16 Faces from a mesh
16 Factorial base numbers indexing permutations of a collection
16 Functional coverage tree
16 Gaussian primes
16 Graph colouring
16 Interactive help
16 Isograms and heterograms
16 Mayan calendar
16 Railway circuit
16 Rainbow
16 Ramanujan primes/twins
16 Run as a daemon or service
16 Search in paragraph's text
16 Simple turtle graphics
16 Sisyphus sequence
16 Text completion
16 Wordiff
15 ASCII control characters
15 Anaprimes
15 Binomial transform
15 Catmull–Clark subdivision surface
15 Centre and radius of a circle passing through 3 points in a plane
15 Centroid of a set of N-dimensional points
15 Check if two polygons overlap
15 Display an outline as a nested table
15 Fermat pseudoprimes
15 Inventory sequence
15 Magic numbers
15 One-time pad
15 Penholodigital squares
15 Prime numbers whose neighboring pairs are tetraprimes
15 Set, the card game
15 Sieve of Pritchard
15 Smarandache-Wellin primes
15 Solve equations with substitution method
15 Tree datastructures
15 Undulating numbers
14 16 puzzle game
14 Check if a polygon overlaps with a rectangle
14 Checksumcolor
14 Colour pinstripe/Printer O
14 Deconvolution/2D+
14 Execute CopyPasta Language
14 Fibonacci matrix-exponentiation
14 Generalised floating point addition
14 Greed
14 Hourglass puzzle
14 Knuth-Morris-Pratt string search
14 Launch rocket with countdown and acceleration in stdout
14 Powerful numbers
14 Singly-linked list/Reversal
14 Smallest number k such that k+2^m is composite for all m less than k
14 Suffixation of decimal numbers
14 Super-Poulet numbers
14 Time-based one-time password algorithm
14 Tupper's self-referential formula
14 Using a speech engine to highlight words
13 Apéry's constant
13 Bioinformatics/Global alignment
13 Countdown
13 Factorize string into Lyndon words
13 French Republican calendar
13 Least m such that n! + m is prime
13 One-two primes
13 Prime reciprocal sum
13 Range modifications
13 Resistance calculator
13 Rice coding
13 Singular value decomposition
13 Sort an outline at every level
13 Spoof game
13 Terminal control/Restricted width positional input/No wrapping
13 Wasteful, equidigital and frugal numbers
12 Babylonian spiral
12 Brace expansion using ranges
12 Combinations with repetitions/Square digit chain
12 Distinct palindromes within decimal numbers
12 Elliptic Curve Digital Signature Algorithm
12 External sort
12 IPC via named pipe
12 Morpion solitaire
12 Parse EBNF
12 Particle fountain
12 Peripheral drift illusion
12 Pinstripe/Printer O
12 Rosetta Code/Rank languages by number of users
12 Rosetta Code/Tasks without examples
12 Starting a web browser
12 Terminal control/Restricted width positional input/With wrapping
12 Transliterate English text using the Greek alphabet
12 Worthwhile task shaving
11 Addition-chain exponentiation
11 Discrete Fourier transform
11 Doubly-linked list/Element removal
11 GSTrans string conversion
11 Greatest prime dividing the n-th cubefree number
11 Integer long division
11 N-queens minimum and knights and bishops
11 Numbers k such that the last letter of k is the same as the first letter of k+1
11 Numerical and alphabetical suffixes
11 OpenGL/Utah teapot
11 Price list behind API
11 Smallest enclosing circle problem
11 Sorensen–Dice coefficient
11 Statistics/Chi-squared distribution
11 URL shortener
10 Black box
10 Compiler/Verifying syntax
10 Cycles of a permutation
10 Factor-perfect numbers
10 Hashtron inference
10 Hex dump
10 L-system
10 P-Adic numbers, basic
10 Raster bars
10 Resistance network calculator
10 Robots
10 Strassen's algorithm
10 Tamagotchi emulator
10 Text to HTML
10 Universal Lambda Machine
10 User defined pipe and redirection operators
9 Audio overlap loop
9 B-spline
9 Consistent overhead byte stuffing
9 Dating agency
9 Eisenstein primes
9 Engel expansion
9 Fibonacci heap
9 I'm a software engineer, get me out of here
9 Inner classes
9 Marching squares
9 Multidimensional Newton-Raphson method
9 OpenGL pixel shader
9 Random sentence from book
9 Rosetta Code/Run examples
9 Sealed classes and methods
9 Segmentation fault protection
9 Selection bias in clinical sciences
9 Variadic fixed-point combinator
8 Exponential digital sums
8 Hexapawn
8 Horse racing
8 JSON pointer
8 Lagrange Interpolation
8 Lucas-Carmichael numbers
8 Lyndon word
8 P-Adic square roots
8 Recursive descent parser generator
8 Remote agent/Agent logic
8 Remote agent/Simulation
8 Simulated optics experiment/Data analysis
8 Simulated optics experiment/Simulator
8 Syntax highlighting using Mediawiki formatting
8 Waveform analysis/Doh ray me
8 WiktionaryDumps to words
7 Anagram generator
7 Autogram checker
7 Boids
7 Chess player
7 Compiler/Simple file inclusion pre processor
7 Create an executable for a program in an interpreted language
7 Divide a rectangle into a number of unequal triangles
7 Dominoes
7 English cardinal anagrams
7 Latin Squares in reduced form/Randomizing using Jacobson and Matthews' technique
7 Process SMIL directives in XML data
7 Red black tree sort
7 Remote agent/Agent interface
7 Roots of a cubic polynomial
7 Solve a Rubik's cube
7 Wave function collapse
6 CLI-based maze-game
6 Carmichael lambda function
6 Convert CSV records to TSV
6 Create your own text control codes
6 Erdős–Woods numbers
6 Goodstein Sequence
6 Multiton
6 OLE automation O O
6 Posit numbers/encoding
6 Rosetta Code/List authors of task descriptions
6 Sturmian word
6 Szymański's algorithm
6 Ukkonen’s suffix tree construction
6 Use a REST API
6 Vidir
6 Visitor pattern
5 Continued fraction convergents
5 Diophantine linear system solving
5 Extended Straddling Checkerboard
5 Generalised floating point multiplication
5 Number triplets game
5 Posit numbers/decoding
5 Sanitize user input
5 Solving coin problems
5 Unicode polynomial equation
5 Waveform analysis/Top and tail
5 Weather routing
4 15 puzzle game in 3D
4 Blackjack strategy
4 Color separation
4 Compiler/Preprocessor
4 Cross compilation
4 IRC gateway
4 Protecting Memory Secrets
4 Uno (card game)
4 WebGL rotating F
3 3d turtle graphics
3 Elevator simulation