Rosetta Code/Count examples/Full list/Tier 3

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Revision as of 22:01, 4 April 2021 by Thundergnat (talk | contribs) (Update full list output)

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 Scala         ㉒ C_sharp       ㉓ Sidef         ㉔ Factor        ㉕ PicoLisp     
    ㉖ Lua           ㉗ Ada           ㉘ Rust          ㉙ Mathematica   ㉚ Common_Lisp  
As of 2021-04-04T21:59:41Z :: Tasks: 1099 :: Draft Tasks:255 :: Total Tasks: 1354 :: Total Examples: 74804
Count Task
485 Hello world/Text
321 99 bottles of beer  
315 100 doors
313 FizzBuzz
287 Factorial
286 Fibonacci sequence
275 Comments
265 A+B
260 Empty program
239 Function definition
229 Loops/Infinite
225 Loops/While
223 Arrays
223 Reverse a string
221 Ackermann function
206 Loops/For
200 Conditional structures  
198 Greatest common divisor
197 Greatest element of a list
196 Arithmetic/Integer
187 Array concatenation
186 Repeat a string
185 Even or odd
185 Integer comparison
183 Averages/Arithmetic mean
181 Increment a numerical string
178 Hello world/Graphical
173 Copy a string
169 Boolean values
168 Loops/Downward for
168 Sieve of Eratosthenes
167 String concatenation
165 Apply a callback to an array
165 Character codes
164 Loops/Do-while
164 Loops/N plus one half
163 Hello world/Newline omission
163 Loops/For with a specified step
163 Sum and product of an array
162 Array length
162 Loops/Foreach
162 String length
161 Binary digits
161 Towers of Hanoi
160 Integer sequence
160 Loops/Break
160 Palindrome detection
159 Sum of a series
158 String case
156 Tokenize a string
155 Generic swap
155 Leap year
155 Rot-13
154 Dot product
154 Empty string
154 Sum of squares
153 Hailstone sequence
153 Logical operations
150 Filter
149 Associative array/Creation
149 Quine
148 Sort an integer array
147 Sorting algorithms/Bubble sort
145 Execute a system command
144 Caesar cipher
144 Factors of an integer
143 Guess the number
143 Loop over multiple arrays simultaneously
143 Roman numerals/Encode
143 System time
142 Higher-order functions
141 Remove duplicate elements
141 Sorting algorithms/Quicksort
140 Determine if a string is numeric
140 User input/Text
139 File input/output
137 Bitwise operations
137 Day of the week
137 Primality by trial division
136 Hello world/Standard error
136 Luhn test of credit card numbers
135 Command-line arguments
135 Read entire file
134 Create a file
134 Stack
133 Loops/Continue
132 Mutual recursion
132 Substring
131 Sleep
130 Generate lower case ASCII alphabet
130 Happy numbers
130 Zero to the zero power
129 Least common multiple
129 Literals/String  
129 Pascal's triangle
128 Check that file exists
128 Date format
128 Flatten a list
127 ABC problem
124 Binary search
124 Compound data type
124 Program termination
123 Balanced brackets
123 Function composition
123 Literals/Integer
122 Detect division by zero
122 Ethiopian multiplication
122 Include a file
122 Variables    
121 Formatted numeric output
121 Loops/Nested
120 Knuth shuffle
120 N-queens problem
119 Associative array/Iteration
119 Averages/Root mean square
118 Mandelbrot set
118 Null object
118 Read a file line by line
117 Count occurrences of a substring
117 Roman numerals/Decode
117 Search a list
117 Sorting algorithms/Insertion sort
116 Anagrams
116 Count in octal
116 Hash from two arrays
116 Multiplication tables
116 Real constants and functions
115 Case-sensitivity of identifiers
115 Delete a file
115 File size
115 Guess the number/With feedback
115 Identity matrix
114 Classes  
114 Matrix transposition
113 Align columns
113 Babbage problem
113 Environment variables
113 Find limit of recursion
113 Input loop
113 Matrix multiplication
113 String matching
112 Averages/Median
112 Letter frequency
112 Pick random element
112 Random numbers
112 Rename a file
111 Hostname
111 Return multiple values
110 HTTP
110 Pangram checker
110 Perfect numbers
109 Arithmetic/Complex
109 Haversine formula
108 Accumulator factory
108 Assertions
108 Catalan numbers
108 Conway's Game of Life  
108 Temperature conversion
107 Infinity
106 Horner's rule for polynomial evaluation
106 Permutations
106 Substring/Top and tail
106 Variadic function  
105 Averages/Pythagorean means
105 Levenshtein distance
105 Program name
105 Run-length encoding
105 Strip a set of characters from a string
104 Anonymous recursion
104 Arithmetic-geometric mean
104 Evaluate binomial coefficients
104 Look-and-say sequence
104 Reverse words in a string
104 String append
103 Prime decomposition
103 Regular expressions
103 Strip whitespace from a string/Top and tail
103 Zig-zag matrix
102 Exceptions
102 Nth root
102 Sierpinski triangle  
102 String interpolation (included)
101 Combinations
101 Ordered words
101 Queue/Definition
101 Sorting algorithms/Merge sort
101 Trigonometric functions
100 Comma quibbling
99 Bulls and cows
99 Middle three digits
99 Shell one-liner
99 Short-circuit evaluation
99 Sorting algorithms/Selection sort
98 Call a function
98 String prepend
98 Sum multiples of 3 and 5
97 24 game
97 Arbitrary-precision integers (included)
97 Create a two-dimensional array at runtime
97 Range extraction  
96 Interactive programming  
96 Power set
96 Range expansion
96 Sum digits of an integer
96 Y combinator  
95 Sorting algorithms/Gnome sort
94 Collections
94 Enumerations
94 Time a function
94 Vector products
93 Digital root
93 Evolutionary algorithm
93 First-class functions
93 Sierpinski carpet
93 The Twelve Days of Christmas
93 Walk a directory/Non-recursively
92 Averages/Mode
92 Execute Brain****
92 Exponentiation operator
92 Inheritance/Single    
92 MD5
92 N'th
92 One-dimensional cellular automata
92 Sequence of non-squares
92 Sorting algorithms/Cocktail sort
91 Create an HTML table
90 Cumulative standard deviation
90 JSON
90 Random number generator (included)
90 Sort using a custom comparator
89 Averages/Simple moving average
89 Dragon curve  
89 Forward difference  
89 Hello world/Newbie    
89 Sorting algorithms/Bogosort
89 String comparison  
89 Symmetric difference
88 Entropy
88 Josephus problem
88 Langton's ant  
88 Monty Hall problem  
87 Gray code
87 Greatest subsequential sum
87 Hamming numbers
87 Harshad or Niven series
87 Number names
87 Price fraction
86 CSV data manipulation
86 Five weekends
86 Menu
85 Abstract type  
85 Abundant, deficient and perfect number classifications
85 Compare a list of strings
85 Tree traversal
84 CSV to HTML translation
84 Hofstadter Q sequence  
84 Map range
84 Sorting algorithms/Heapsort    
83 Catamorphism
83 Last Friday of each month
83 Non-decimal radices/Convert
83 Queue/Usage
83 Simple windowed application
83 Sort an array of composite structures
83 Walk a directory/Recursively
83 Window creation
82 Closures/Value capture
82 File modification time
82 Number reversal game
82 SEDOLs  
82 Set
82 Terminal control/Clear the screen  
81 Box the compass  
81 Count in factors
81 Introspection    
81 Monte Carlo methods
80 Amicable pairs
80 Calculating the value of e
80 Hello world/Line printer  
80 Literals/Floating point
80 Terminal control/Ringing the terminal bell
80 URL decoding
79 Count the coins
79 Long multiplication    
79 Playing cards
79 Roots of unity
79 Singly-linked list/Traversal  
79 Sorting algorithms/Shell sort  
79 Spiral matrix
79 Split a character string based on change of character
79 Top rank per group
79 Web scraping
78 Bitmap  
78 Concurrent computing
78 Date manipulation  
78 Find common directory path    
78 Find the last Sunday of each month
78 Order two numerical lists
78 Read a specific line from a file
78 Show the epoch
78 XML/Input
77 Address of a variable      
77 CRC-32  
77 Floyd's triangle
77 Jensen's Device
77 Knapsack problem/0-1
77 Linear congruential generator
77 Multifactorial  
77 Operator precedence    
77 Proper divisors
77 Pythagorean triples  
77 Repeat
77 Sockets  
77 Sorting algorithms/Counting sort  
77 Strip comments from a string
77 Word wrap
76 Call an object method  
76 Find the missing permutation
76 Here document
76 Keyboard input/Obtain a Y or N response    
76 Munchausen numbers
76 URL encoding
75 Almost prime
75 Dynamic variable names      
75 Kaprekar numbers  
75 Lucas-Lehmer test  
75 Man or boy test  
75 Modular inverse  
75 Non-decimal radices/Output
74 Anagrams/Deranged anagrams
74 Averages/Mean angle
74 Calendar
74 List comprehensions
74 Parsing/RPN calculator algorithm
74 Phrase reversals
74 Population count
74 Read a configuration file    
74 SHA-1
74 Semordnilap
74 Sorting algorithms/Comb sort  
74 Soundex  
73 Equilibrium index  
73 Fibonacci n-step number sequences
73 Gamma function  
73 Hello world/Web server  
73 Pi
73 Sudoku  
73 Unicode variable names
73 Write entire file
72 Animation    
72 Empty directory
72 Exceptions/Catch an exception thrown in a nested call
72 Execute HQ9+
72 Multiple distinct objects
72 SHA-256
72 Singly-linked list/Element definition  
72 Special characters          
71 AKS test for primes
71 Convert seconds to compound duration
71 Longest common subsequence
71 Rock-paper-scissors  
71 Show ASCII table      
71 Sort disjoint sublist
71 Take notes on the command line
70 Bitmap/Bresenham's line algorithm
70 Call a foreign-language function    
70 Currying  
70 Enforced immutability  
70 Euler's sum of powers conjecture
70 Largest int from concatenated ints
70 Polymorphism    
70 Quaternion type
70 Stair-climbing puzzle  
70 Vigenère cipher
70 Write float arrays to a text file    
70 Zeckendorf number representation  
69 15 puzzle game      
69 Catalan numbers/Pascal's triangle
69 Closest-pair problem    
69 Combinations with repetitions  
69 Constrained random points on a circle
69 Draw a sphere
69 Flow-control structures      
69 Four bit adder  
69 Guess the number/With feedback (player)
69 IBAN
69 Numerical integration
69 Self-describing numbers  
69 Sorting algorithms/Stooge sort
68 Euler method
68 Extend your language
68 Horizontal sundial calculations      
68 Jump anywhere    
68 Magic squares of odd order  
68 Maze generation  
68 Old lady swallowed a fly
68 Priority queue
68 Text processing/Max licenses in use
68 Trabb Pardo–Knuth algorithm  
67 Benford's law  
67 Fork
67 Fractal tree    
67 Named parameters  
67 Nested function
67 Sorting algorithms/Pancake sort    
66 Arithmetic/Rational
66 Chinese remainder theorem
66 Fast Fourier transform
66 One of n lines in a file
66 Pernicious numbers
66 Remove lines from a file  
66 Roots of a function  
66 Runtime evaluation        
66 Sort stability
66 Special variables        
66 Strip control codes and extended characters from a string  
66 Unix/ls  
65 Amb  
65 Documentation  
65 General FizzBuzz
65 HTTPS  
65 Morse code    
65 Narcissistic decimal number
65 Optional parameters  
65 Roots of a quadratic function  
65 Sequence of primes by trial division    
65 Variable size/Get  
64 Barnsley fern  
64 Continued fraction
64 Hofstadter-Conway $10,000 sequence  
64 Inheritance/Multiple  
64 Reduced row echelon form  
64 Thue-Morse  
64 XML/Output
63 Anti-primes  
63 Factors of a Mersenne number  
63 Memory allocation    
63 Non-decimal radices/Input
63 Singly-linked list/Element insertion  
63 Write language name in 3D ASCII  
62 Animate a pendulum
62 Cholesky decomposition    
62 Circles of given radius through two points      
62 Exponentiation order  
62 Globally replace text in several files
62 Mouse position    
62 Plot coordinate pairs      
62 Probabilistic choice
62 Rep-string    
62 Runge-Kutta method      
62 Semiprime
62 Undefined values
61 Angle difference between two bearings    
61 Averages/Mean time of day  
61 Department numbers  
61 Get system command output
61 Modular exponentiation  
61 Sorting algorithms/Sleep sort
61 Tic-tac-toe    
61 Van der Corput sequence  
60 Arithmetic evaluation  
60 Best shuffle  
60 Binary strings    
60 Knapsack problem/Continuous    
60 Partial function application  
60 Sort three variables    
60 Test a function  
59 24 game/Solve  
59 9 billion names of God the integer
59 Bitmap/Write a PPM file  
59 Draw a clock    
59 Dutch national flag problem    
59 Emirp primes
59 Generator/Exponential  
59 Host introspection    
59 Huffman coding
59 Jewels and stones      
59 Knapsack problem/Unbounded  
59 Miller–Rabin primality test    
59 Truncatable primes
59 Unicode strings    
59 Word frequency  
58 Add a variable to a class instance at runtime    
58 Brownian tree
58 Compile-time calculation
58 Damm algorithm    
58 Hash join    
58 Knight's tour  
58 Odd word problem      
58 User input/Graphical        
58 Yin and yang      
57 2048    
57 4-rings or 4-squares puzzle    
57 Deal cards for FreeCell  
57 Delegates  
57 Draw a cuboid    
57 I before E except after C    
57 Integer overflow    
57 JortSort
57 Left factorials  
57 Leonardo numbers
57 Ludic numbers
57 Mad Libs    
57 Matrix-exponentiation operator
57 Multisplit    
57 Random number generator (device)  
57 Scope modifiers      
57 Sorting algorithms/Bead sort        
57 Sorting algorithms/Permutation sort      
57 Stem-and-leaf plot    
57 Stern-Brocot sequence    
57 Terminal control/Display an extended character    
57 Two sum      
56 100 prisoners    
56 Cartesian product of two or more lists  
56 DNS query  
56 Dinesman's multiple-dwelling problem  
56 Discordian date      
56 Doubly-linked list/Element definition    
56 Extract file extension
56 Fibonacci word  
56 LZW compression  
56 Longest common prefix      
56 Rosetta Code/Rank languages by popularity        
56 Singleton      
56 Subleq      
56 Terminal control/Coloured text    
56 Topological sort      
56 Truncate a file    
55 Base64 encode data  
55 Define a primitive data type    
55 Extreme floating point values    
55 Forest fire
55 Grayscale image  
55 Long year      
55 Modulinos    
55 Munching squares    
55 Stack traces    
54 CUSIP    
54 Draw a pixel        
54 Quickselect algorithm    
54 Runtime evaluation/In an environment      
54 Sierpinski triangle/Graphical        
54 Synchronous concurrency      
54 Terminal control/Cursor positioning        
54 XML/XPath    
53 Abundant odd numbers  
53 Bernoulli numbers
53 Convert decimal number to rational  
53 Handle a signal        
53 Maximum triangle path sum
53 Non-continuous subsequences      
53 Pointers and references      
53 Send email      
53 Statistics/Basic  
53 Ternary logic    
53 Unbias a random generator
53 XML/DOM serialization  
52 First-class functions/Use numbers analogously
52 Inverted syntax      
52 Iterated digits squaring
52 Keyboard input/Keypress check          
52 Longest increasing subsequence    
52 Loops/Increment loop index within loop body        
52 Magic 8-ball          
52 Polynomial regression      
52 Strip block comments    
52 Text processing/2    
51 Call a function in a shared library    
51 Determine if a string has all the same characters  
51 Dining philosophers          
51 FASTA format
51 Farey sequence    
51 Gaussian elimination        
51 Heronian triangles        
51 Longest common substring    
51 Move-to-front algorithm
51 Respond to an unknown method call      
51 Seven-sided dice from five-sided dice  
51 Smith numbers  
51 Vector      
51 Wireworld    
50 Archimedean spiral    
50 Attractive numbers      
50 Base64 decode data  
50 Chinese zodiac      
50 Colour bars/Display    
50 Copy stdin to stdout      
50 Determine if a string is collapsible      
50 Dijkstra's algorithm  
50 Find the intersection of two lines    
50 GUI component interaction        
50 Holidays related to Easter  
50 Make directory path
50 Perfect shuffle
50 Pig the dice game      
50 Rate counter        
50 Sattolo cycle        
50 Universal Turing machine  
50 Validate International Securities Identification Number    
49 Fractran        
49 Jaro distance          
49 Last letter-first letter  
49 Pascal matrix generation  
49 Search a list of records
49 Shoelace formula for polygonal area      
49 Text processing/1      
49 Tokenize a string with escaping    
48 Chaos game      
48 Determinant and permanent      
48 Doubly-linked list/Element insertion        
48 Doubly-linked list/Traversal          
48 Extensible prime generator      
48 Greyscale bars/Display          
48 Kernighans large earthquake problem      
48 Metaprogramming    
48 Naming conventions    
48 Polymorphic copy      
48 Polynomial long division      
48 RPG attributes generator          
48 Square but not cube      
48 Zebra puzzle        
47 Append a record to the end of a text file  
47 Echo server    
47 Execute a Markov algorithm      
47 History variables  
47 Hofstadter Figure-Figure sequences    
47 ISBN13 check digit          
47 Kronecker product    
47 Longest string challenge      
47 Password generator    
47 Sort numbers lexicographically
47 Stable marriage problem          
47 Visualize a tree  
46 Average loop length    
46 Bitmap/Flood fill      
46 Determine if only one instance is running      
46 Egyptian division  
46 Narcissist    
46 Set consolidation    
46 Water collected between towers      
45 Active object    
45 Associative array/Merging            
45 Determine if a string has all unique characters    
45 Image noise      
45 McNuggets problem      
45 OpenGL    
45 Parsing/Shunting-yard algorithm        
45 Rosetta Code/Count examples    
45 Send an unknown method call    
45 Sorting algorithms/Radix sort      
45 Verify distribution uniformity/Naive        
44 Bulls and cows/Player    
44 Carmichael 3 strong pseudoprimes      
44 Doubly-linked list/Definition          
44 Element-wise operations    
44 Elementary cellular automaton
44 GUI/Maximum window dimensions        
44 Generate Chess960 starting position      
44 Sparkline in unicode      
44 Subtractive generator      
44 Ulam spiral (for primes)    
43 Atomic updates      
43 Bitmap/Read a PPM file      
43 Cantor set      
43 Hickerson series of almost integers      
43 Keyboard input/Flush the keyboard buffer            
43 Knapsack problem/Bounded          
43 MD5/Implementation  
43 Percentage difference between images    
43 Spinning rod animation/Text        
43 Sum to 100      
43 Taxicab numbers      
42 Aliquot sequence classifications          
42 Calendar - for "REAL" programmers          
42 Currency        
42 Digital root/Multiplicative digital root    
42 Gapful numbers              
42 Nim game        
42 Permutations/Derangements      
42 Secure temporary file    
42 Sorting Algorithms/Circle Sort            
42 Table creation/Postal addresses            
42 Terminal control/Dimensions        
42 Text between          
42 Truth table        
42 Twelve statements        
42 Van Eck sequence      
42 Voronoi diagram          
41 Balanced ternary    
41 Bitmap/Midpoint circle algorithm      
41 Combinations and permutations            
41 Deepcopy    
41 Fusc sequence        
41 Hilbert curve      
41 Parallel calculations    
41 Pascal's triangle/Puzzle      
41 Problem of Apollonius          
41 Remove vowels from a string            
41 S-expressions      
41 Sorting algorithms/Strand sort            
41 Speech synthesis          
41 Start from a main routine          
41 UTF-8 encode and decode    
41 Variable size/Set            
40 Casting out nines      
40 Color of a screen pixel          
40 Euler's identity  
40 Fivenum      
40 Flipping bits game            
40 GUI enabling/disabling of controls          
40 Inverted index      
40 Primorial numbers      
40 Recaman's sequence            
40 Sailors, coconuts and a monkey problem            
40 Scope/Function names and labels            
40 Sort a list of object identifiers    
40 Summarize and say sequence      
40 The Name Game          
40 Variable-length quantity        
39 Abbreviations, automatic        
39 Brace expansion        
39 Chowla numbers          
39 Colour pinstripe/Display      
39 Cramer's rule    
39 Create a file on magnetic tape          
39 Julia set        
39 Knuth's algorithm S        
39 Magic squares of doubly even order        
39 Musical scale                
39 Order disjoint list items      
39 Parametric polymorphism        
39 Parsing/RPN to infix conversion        
39 Permutation test    
39 Permutations by swapping        
39 Permutations with repetitions          
39 Prime conspiracy      
39 Ray-casting algorithm        
39 Topswops        
38 Brazilian numbers          
38 Break OO privacy      
38 Constrained genericity      
38 Cuban primes    
38 Days between dates    
38 Feigenbaum constant calculation        
38 Kahan summation          
38 LU decomposition          
38 MAC Vendor Lookup  
38 Metered concurrency        
38 Pathological floating point problems        
38 Pythagorean quadruples        
38 QR decomposition          
38 Ranking methods          
38 Read a file character by character/UTF8      
38 Statistics/Normal distribution          
37 21 game            
37 Abbreviations, easy            
37 Bell numbers    
37 File extension is in extensions list          
37 Find palindromic numbers in both binary and ternary bases    
37 Function prototype            
37 Input/Output for lines of text            
37 Input/Output for pairs of numbers          
37 Long primes          
37 Loops/Wrong ranges              
37 Lychrel numbers        
37 MD4  
37 Metronome        
37 Object serialization        
37 Substitution cipher      
37 Terminal control/Hiding the cursor          
37 Terminal control/Inverse video          
37 Test integerness        
37 Totient function    
37 Vampire number      
36 Abbreviations, simple            
36 Bitwise IO          
36 Convex hull      
36 Determine if a string is squeezable        
36 Display a linear combination        
36 Egyptian fractions      
36 Events          
36 Fibonacci word/fractal        
36 Find the intersection of a line with a plane        
36 Floyd-Warshall algorithm            
36 Humble numbers          
36 Idiomatically determine all the lowercase and uppercase letters        
36 Largest number divisible by its digits        
36 Loops/With multiple ranges              
36 Maze solving            
36 Minesweeper game        
36 Numerical integration/Gauss-Legendre Quadrature          
36 Penney's game            
36 Pinstripe/Display        
36 RIPEMD-160  
36 Solve the no connection puzzle            
36 Sutherland-Hodgman polygon clipping      
36 Terminal control/Unicode output          
35 Approximate equality      
35 Arithmetic-geometric mean/Calculate Pi      
35 Bitmap/Bézier curves/Cubic            
35 Check output device is a terminal      
35 Entropy/Narcissist        
35 Isqrt (integer square root) of X              
35 Multiline shebang        
35 Multiple regression          
35 Ordered partitions      
35 Parametrized SQL statement          
35 Pentagram            
35 Square-free integers        
34 Conjugate transpose      
34 Pattern matching          
34 Primality by Wilson's theorem              
34 RSA code    
34 Rosetta Code/Find bare lang tags                
34 Safe primes and unsafe primes            
34 Subset sum problem        
33 Cheryl's birthday      
33 Continued fraction/Arithmetic/Construct from rational number        
33 Executable library      
33 Factorions              
33 Integer roots        
33 Mertens function                
33 Multi-dimensional array          
33 Mutex              
33 Negative base numbers        
33 Old Russian measure of length            
33 Parse command-line arguments            
33 Partition an integer x into n primes        
33 Poker hand analyser        
33 Pythagoras tree              
33 Resistor mesh            
33 Solve a Hidato puzzle              
33 Sorting algorithms/Patience sort              
33 Topic variable            
32 Bioinformatics/base count                
32 Bitcoin/address validation      
32 Bitmap/Bézier curves/Quadratic            
32 Check input device is a terminal            
32 Church numerals              
32 Decimal floating point number to binary            
32 Determine if two triangles overlap            
32 Eban numbers          
32 Execute SNUSP          
32 Four is magic          
32 Galton box animation                
32 Lah numbers            
32 Multiplicative order          
32 Set puzzle            
32 Straddling checkerboard            
32 Textonyms            
32 Type detection        
31 Apply a digital filter (direct form II transposed)      
31 Bitmap/Histogram        
31 Cycle detection            
31 Faulhaber's formula          
31 Faulhaber's triangle          
31 First class environments            
31 Keyboard macros              
31 Numeric error propagation        
31 Palindrome dates          
31 Perfect totient numbers            
31 Reflection/List properties            
31 Rosetta Code/Find unimplemented tasks        
31 Sequence: smallest number with exactly n divisors                
31 Set of real numbers            
31 Terminal control/Cursor movement          
31 URL parser          
31 Use another language to call a function              
31 Write to Windows event log              
30 Chaocipher          
30 Check Machin-like formulas              
30 Checkpoint synchronization            
30 Deconvolution/1D        
30 Dice game probabilities          
30 Diversity prediction theorem          
30 Draw a rotating cube          
30 FTP          
30 HTTPS/Authenticated      
30 Implicit type conversion            
30 Koch curve            
30 Mersenne primes          
30 Mian-Chowla sequence              
30 Modular arithmetic        
30 Parallel brute force      
30 Pragmatic directives        
30 Rosetta Code/Fix code tags        
30 Sequence: smallest number greater than previous term with exactly n divisors              
30 Simple database            
30 Stream merge            
30 Terminal control/Preserve screen          
30 Two identical strings                  
30 Window creation/X11            
30 Xiaolin Wu's line algorithm              
30 Zhang-Suen thinning algorithm              
29 Arena storage pool        
29 Bacon cipher            
29 Chat server            
29 Death Star              
29 Decision tables          
29 Gauss-Jordan matrix inversion              
29 Jacobi symbol            
29 Memory layout of a data structure              
29 State name puzzle              
29 Update a configuration file                  
29 Word break problem          
28 AVL tree        
28 Chemical calculator              
28 Compiler/lexical analyzer            
28 Extra primes              
28 Find first and last set bit of a long integer              
28 Find largest left truncatable prime in a given base            
28 First power of 2 that has leading decimal digits of 12              
28 Formal power series          
28 Honeycombs          
28 Peano curve            
28 Perlin noise            
28 Polyspiral              
28 Ramsey's theorem                
28 Sexy primes          
28 Smarandache prime-digital sequence            
28 Sorting algorithms/Cycle sort                
28 Strong and weak primes          
28 Sum and product puzzle        
28 Super-d numbers          
28 Thiele's interpolation formula          
28 Verify distribution uniformity/Chi-squared test            
28 Yellowstone sequence            
27 Active Directory/Connect            
27 Angles (geometric), normalization and conversion          
27 Burrows–Wheeler transform          
27 Chebyshev coefficients            
27 Create an object at a given address            
27 Cut a rectangle              
27 Go Fish                
27 Law of cosines - triples            
27 Machine code          
27 Natural sorting              
27 Nautical bell                  
27 Palindromic gapful numbers              
27 Paraffins                
27 Range consolidation              
27 Reflection/List methods          
27 Safe addition          
27 Same fringe          
27 Superellipse            
27 Table creation            
27 Tau number                
27 The ISAAC Cipher          
27 Weird numbers            
27 World Cup group stage            
27 Zumkeller numbers          
26 Birthday problem                  
26 Card shuffles            
26 Distributed programming          
26 Fairshare between two and more            
26 Fermat numbers            
26 First perfect square in base n with n unique digits                
26 Image convolution            
26 Kronecker product based fractals          
26 N-smooth numbers            
26 Nonoblock                
26 Numbers with prime digits whose sum is 13                  
26 Ramer-Douglas-Peucker line simplification              
26 Solve a Holy Knight's tour              
26 Successive prime differences            
25 A* search algorithm            
25 Abelian sandpile model                
25 Color wheel                
25 Elliptic curve arithmetic                
25 Fraction reduction              
25 Generate random chess position            
25 Idiomatically determine all the characters that can be used for symbols                
25 Intersecting number wheels                
25 Length of an arc between two angles                
25 Magic squares of singly even order                
25 Minimum positive multiple in base 10 using only 0 and 1              
25 Monads/Maybe monad              
25 Möbius function                
25 Parse an IP Address              
25 Pell's equation              
25 Pierpont primes            
25 Plasma effect            
25 Play recorded sounds              
25 RCRPG                
25 Sequence of primorial primes                
25 Stirling numbers of the first kind                
25 Stirling numbers of the second kind                
25 Tau function                  
25 Teacup rim text              
25 Tonelli-Shanks algorithm              
25 Unprimeable numbers            
25 Welch's t-test                
25 Words containing "the" substring                
25 Yahoo! search interface              
24 Audio alarm                  
24 Cipolla's algorithm          
24 Circular primes            
24 Function frequency          
24 Hough transform              
24 Hunt the Wumpus            
24 K-means++ clustering              
24 Linux CPU utilization                  
24 List rooted trees                
24 Mayan numerals                
24 Mind boggling card trick              
24 Percolation/Mean run density              
24 Permutations/Rank of a permutation                
24 Sierpinski pentagon          
24 Simulate input/Keyboard              
24 Strange plus numbers                  
24 Sum of divisors                  
24 Superpermutation minimisation                
23 Base58Check encoding            
23 Create an object/Native demonstration                
23 Deming's Funnel              
23 Elementary cellular automaton/Random Number Generator                
23 Finite state machine                  
23 Fixed length records              
23 Kolakoski sequence            
23 Longest common suffix                  
23 Lucky and even lucky numbers                  
23 Main step of GOST 28147-89                
23 Make a backup file              
23 Markov chain text generator          
23 Next highest int from digits              
23 Numbers with equal rises and falls                  
23 Playfair cipher                  
23 Record sound            
23 Reverse the gender of a string                
23 SOAP                  
23 Sorting algorithms/Cocktail sort with shifting bounds                  
23 Strange unique prime triplets                
23 Total circles area                  
23 Video display modes                  
22 Active Directory/Search for a user                
22 Alternade words                
22 Commatizing numbers              
22 De Bruijn sequences                
22 Find duplicate files            
22 Find words which contains more than 3 e vowels                  
22 Find words with alternating vowels and consonants                  
22 Increasing gaps between consecutive Niven numbers                  
22 Long literals, with continuations                
22 Magnanimous numbers              
22 Matrix chain multiplication            
22 Pig the dice game/Player              
22 Primes which sum of digits is 25                  
22 Pseudo-random numbers/PCG32              
22 Random Latin squares                
22 Shift list elements to left by 3                
22 Shortest common supersequence                
22 Snake and Ladder              
22 Solve a Hopido puzzle                  
22 Spelling of ordinal numbers            
21 ASCII art diagram converter                
21 Bin given limits            
21 Cousin primes                  
21 Data Encryption Standard              
21 Eertree                  
21 Esthetic numbers            
21 Joystick position                
21 Kosaraju              
21 Mastermind              
21 Median filter              
21 Monads/List monad                  
21 Native shebang                  
21 Numeric separator syntax              
21 Orbital elements              
21 Padovan sequence                
21 Product of divisors                  
21 Pseudo-random numbers/Xorshift star            
21 Reflection/Get source                
21 Sokoban                
21 Solve a Numbrix puzzle                  
21 UPC                
21 Window management                
21 Word wheel                
20 Addition chains              
20 Assertions in design by contract                
20 Bioinformatics/Sequence mutation                
20 Bitcoin/public point to address            
20 Cistercian numerals                
20 Index finite lists of positive integers                
20 Levenshtein distance/Alignment            
20 Nested templated data                  
20 Polynomial synthetic division              
20 Self numbers                    
20 Sum data type              
20 Vigenère cipher/Cryptanalysis                
20 Vogel's approximation method                
19 Abelian sandpile model/Identity            
19 Bilinear interpolation              
19 Code segment unload                  
19 Color quantization              
19 Common sorted list                  
19 Elementary cellular automaton/Infinite length                  
19 K-d tree              
19 Knuth's power tree                  
19 Line circle intersection                  
19 Metallic ratios                
19 Montgomery reduction            
19 N-body problem                  
19 Names to numbers              
19 P-value correction                  
19 Pancake numbers                    
19 Perceptron                
19 Percolation/Site percolation                
19 Primes - allocate descendants to their ancestors                  
19 Print debugging statement                    
19 Readline interface                
19 Selective file copy                  
19 Sierpinski arrowhead curve              
19 Simulate input/Mouse            
19 Strange numbers                  
19 Sunflower fractal                  
19 Untrusted environment              
18 15 puzzle solver            
18 ABC words                  
18 Arithmetic coding/As a generalized change of radix              
18 Canonicalize CIDR              
18 Compiler/code generator                  
18 Draw pixel 2              
18 EKG sequence convergence                
18 File size distribution              
18 Find URI in text                  
18 Imaginary base numbers                
18 Monads/Writer monad                  
18 Nice primes                
18 Nimber arithmetic                
18 Odd words                
18 SQL-based authentication              
18 Solve triangle solitare puzzle                  
18 Transportation problem                  
18 Twin primes                
18 Ulam numbers                
18 Zeckendorf arithmetic              
17 Biorhythms                  
17 Bitmap/Read an image through a pipe              
17 Change e letters to i in words                  
17 Compiler/virtual machine interpreter                  
17 Exponentiation with infix operators in (or operating on) the base                
17 Find if a point is within a triangle                
17 Find prime numbers of the form n*n*n+2                
17 Just in time processing on a character stream                  
17 Latin Squares in reduced form                  
17 Matrix digital rain                
17 Most frequent k chars distance                  
17 NYSIIS                    
17 Nonogram solver                
17 Particle swarm optimization                  
17 Percolation/Bond percolation                    
17 Percolation/Mean cluster density                  
17 Prime words                
17 Proof                    
17 Retrieve and search chat history                
17 Separate the house number from the street name                
16 Aspect oriented programming                
16 Bitmap/PPM conversion through a pipe                
16 Calkin-Wilf sequence                
16 Changeable words                    
16 Chernick's Carmichael numbers                  
16 Find words which contains all the vowels                  
16 Free polyominoes enumeration              
16 HTTPS/Client-authenticated            
16 Padovan n-step number sequences                  
16 Partition function P              
16 Peaceful chess queen armies                  
16 Pseudo-random numbers/Splitmix64              
16 Ramanujan's constant                  
16 Rare numbers                  
16 Self-hosting compiler              
16 Snake                  
16 Suffix tree                
16 Tarjan              
16 Terminal control/Positional read                  
16 Vibrating rectangles                  
16 Word search                  
15 Compiler/syntax analyzer                  
15 Cyclotomic polynomial                
15 Erdős-primes                
15 Find words which first and last three letters are equals                  
15 Four is the number of letters in the ...                  
15 Functional coverage tree                  
15 Geometric algebra                  
15 Getting the number of decimals                    
15 Merge and aggregate datasets                    
15 Numerical integration/Adaptive Simpson's method                
15 OpenWebNet password                    
15 Rendezvous                
15 Sequence: nth number with exactly n divisors                
15 Singly-linked list/Element removal                
15 Square root by hand                    
15 Words from neighbour ones                  
14 Additive primes                  
14 Compare sorting algorithms' performance                    
14 Compiler/AST interpreter                  
14 Find prime n for that reversed n is also prime                  
14 Generalised floating point addition                    
14 Gradient descent                  
14 Jaro-Winkler distance                  
14 Logistic curve fitting in epidemiology                    
14 Permutations with some identical elements                
14 Topological sort/Extracted top item                    
14 XML validation              
13 Banker's algorithm                  
13 Deconvolution/2D+                  
13 Factorial base numbers indexing permutations of a collection                  
13 Find words which contains most consonants                  
13 Next special primes                    
13 Odd squarefree semiprimes                  
13 Pisano period                
13 Print itself                    
13 SHA-256 Merkle tree                
13 Sine wave                  
12 Canny edge detector                  
12 Common list elements                  
12 Continued fraction/Arithmetic/G(matrix ng, continued fraction n)                    
12 Greed                
12 Interactive help                
12 Launch rocket with countdown and acceleration in stdout                  
12 Longest palindromic substrings                    
12 Minimal steps down to 1                  
12 Pseudo-random numbers/Combined recursive generator MRG32k3a                
12 Run as a daemon or service                
12 Safe mode                
12 Sierpinski curve              
12 Simulated annealing                  
12 Sorting algorithms/Tree sort on a linked list                    
12 Tetris                  
12 Two bullet roulette                  
12 VList                  
12 XXXX redacted                  
11 Almkvist-Giullera formula for pi                  
11 Audio frequency generator                    
11 Catmull–Clark subdivision surface                  
11 Checksumcolor                
11 Find first missing positive                  
11 Geohash                
11 Minkowski question-mark function                  
11 Modified random distribution                
11 One-time pad                    
11 Pentomino tiling                  
11 Piprimes                    
11 Railway circuit                    
11 Resistance calculator                    
11 Sierpinski square curve              
11 Smallest square that begins with n                  
11 Text completion                  
11 Tree from nesting levels                    
11 Unit testing                  
11 Untouchable numbers                    
11 Using a speech engine to highlight words                  
10 Colour pinstripe/Printer                  
10 Combinations with repetitions/Square digit chain                    
10 Consecutive Primes With Ascending Or Descending Differences                
10 Execute CopyPasta Language                    
10 External sort                    
10 Faces from a mesh                    
10 Frobenius numbers                
10 Non-transitive dice                  
10 Penrose tiling                
10 Pinstripe/Printer                  
10 Powerful numbers                  
10 Primes with digits in nondecreasing order                  
10 Spoof game                    
10 Suffixation of decimal numbers                    
10 Three word location                    
10 Time-based one-time password algorithm                
10 Tree datastructures                    
9 Bioinformatics/Subsequence                  
9 Curve that touches three points                    
9 Display an outline as a nested table                    
9 Fibonacci matrix-exponentiation                
9 French Republican calendar                  
9 Graph colouring                    
9 Hourglass puzzle                    
9 IPC via named pipe                  
9 Morpion solitaire                    
9 Parse EBNF                  
9 Pseudorandom number generator image                  
9 Quadrat Special Primes                    
9 Quoting constructs                    
9 Range modifications                    
9 Resistance network calculator                    
9 Rosetta Code/Tasks without examples                    
9 Special factorials                  
9 Starting a web browser                  
9 Text to HTML                    
9 User defined pipe and redirection operators                    
9 War card game                    
8 Continued fraction/Arithmetic/G(matrix ng, continued fraction n1, continued fraction n2)                    
8 Count the coins/0-1                    
8 Cubic Special Primes                    
8 Elliptic Curve Digital Signature Algorithm                    
8 Multidimensional Newton-Raphson method                  
8 Numerical and alphabetical suffixes                  
8 Practical numbers                    
8 Rosetta Code/Rank languages by number of users                    
8 Sort an outline at every level                    
8 Square Form Factorization                    
7 16 puzzle game                    
7 Brace expansion using ranges                    
7 Compiler/Verifying syntax                    
7 Fibonacci heap                    
7 Mayan calendar                    
7 OpenGL/Utah Teapot                    
7 P-Adic numbers, basic                    
7 Random sentence from book                    
7 Recursive descent parser generator                    
7 Robots                    
7 URL shortener                  
6 Bioinformatics/global alignment                    
6 Doubly-linked list/Element removal                    
6 I'm a software engineer, get me out of here                    
6 OpenGL pixel shader                    
6 Price list behind API                    
6 Remote agent/Agent logic                  
6 Remote agent/Simulation                  
6 Rosetta Code/Run examples                    
6 Smallest enclosing circle problem                    
6 Special Divisors                    
6 Terminal control/Restricted width positional input/No wrapping                  
6 Terminal control/Restricted width positional input/With wrapping                  
5 Addition-chain exponentiation                    
5 Audio overlap loop                    
5 Black Box                    
5 Boids                    
5 Chess player                  
5 Hexapawn                    
5 P-Adic square roots                    
5 Process SMIL directives in XML data                    
5 Raster bars                  
5 Remote agent/Agent interface                  
5 Solve a Rubik's Cube                    
5 Strassen's algorithm                    
5 Tamagotchi emulator                    
5 Waveform analysis/Doh ray me                    
4 Generalised floating point multiplication                    
4 Latin Squares in reduced form/Randomizing using Jacobson and Matthews’ Technique                    
4 OLE automation                    
4 Solving coin problems                    
4 Unicode polynomial equation                    
4 Using the Meetup.com API                    
4 Weather routing                    
4 WiktionaryDumps to words                    
3 Rosetta Code/List authors of task descriptions                    
3 Ukkonen’s suffix tree construction                    
3 Vidir                    
3 Waveform analysis/Top and tail                    
2 15 puzzle game in 3D                    
2 CLI-based maze-game                    
2 IRC gateway                    
1 Blackjack strategy