Rosetta Code/Count examples/Full list/Tier 2

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Revision as of 23:50, 28 February 2021 by Thundergnat (talk | contribs) (Update full list output)

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
Second ten programming languages by number of task examples completed:
    ⑪ REXX          ⑫ Zkl           ⑬ Wren          ⑭ J             ⑮ Ruby         
    ⑯ C++           ⑰ Haskell       ⑱ D             ⑲ Tcl           ⑳ Nim          
As of 2021-02-28T23:48:43Z :: Tasks: 1089 :: Draft Tasks:240 :: Total Tasks: 1329 :: Total Examples: 73599
Count Task
481 Hello world/Text
319 99 bottles of beer
313 100 doors
311 FizzBuzz
285 Factorial
285 Fibonacci sequence
274 Comments
264 A+B
259 Empty program
238 Function definition
229 Loops/Infinite
224 Loops/While
223 Arrays
223 Reverse a string
219 Ackermann function  
206 Loops/For
200 Conditional structures
197 Greatest common divisor
196 Arithmetic/Integer
196 Greatest element of a list
187 Array concatenation
186 Repeat a string
185 Integer comparison
184 Even or odd
183 Averages/Arithmetic mean
181 Increment a numerical string
176 Hello world/Graphical
173 Copy a string
169 Boolean values
168 Loops/Downward for
166 Sieve of Eratosthenes
165 Apply a callback to an array
165 Character codes
165 String concatenation
164 Loops/Do-while
164 Loops/N plus one half
163 Hello world/Newline omission
163 Loops/For with a specified step
162 Array length
162 Loops/Foreach
162 Sum and product of an array
161 String length
160 Binary digits
160 Palindrome detection
159 Integer sequence
159 Loops/Break
158 Towers of Hanoi
157 String case
156 Sum of a series
155 Tokenize a string
154 Dot product
154 Generic swap
154 Leap year
153 Empty string
153 Rot-13
153 Sum of squares
152 Hailstone sequence
152 Logical operations
149 Associative array/Creation
149 Filter
148 Quine
146 Sorting algorithms/Bubble sort
145 Execute a system command
145 Sort an integer array
144 Factors of an integer
142 Guess the number
142 Higher-order functions
142 Roman numerals/Encode
142 System time
141 Caesar cipher
141 Remove duplicate elements
140 Determine if a string is numeric
140 Loop over multiple arrays simultaneously
140 User input/Text
139 File input/output
138 Sorting algorithms/Quicksort
137 Bitwise operations
136 Day of the week
136 Hello world/Standard error
136 Primality by trial division
135 Command-line arguments
135 Luhn test of credit card numbers
135 Read entire file
133 Create a file
133 Stack
132 Loops/Continue
131 Mutual recursion
131 Substring
130 Generate lower case ASCII alphabet
130 Sleep
129 Literals/String
128 Check that file exists
128 Flatten a list
128 Happy numbers
128 Pascal's triangle
127 ABC problem
127 Least common multiple
126 Date format
126 Zero to the zero power
124 Binary search
124 Program termination
123 Balanced brackets
123 Compound data type
123 Literals/Integer
122 Function composition
122 Include a file  
121 Detect division by zero
121 Ethiopian multiplication
121 Loops/Nested
120 Formatted numeric output
120 Knuth shuffle
120 Variables
119 Associative array/Iteration
119 Averages/Root mean square
118 Null object
118 Read a file line by line
117 Count occurrences of a substring
117 Mandelbrot set  
117 N-queens problem
116 Anagrams
116 Count in octal
116 Hash from two arrays
116 Multiplication tables
116 Real constants and functions
116 Roman numerals/Decode
116 Search a list
115 Case-sensitivity of identifiers
115 File size
115 Sorting algorithms/Insertion sort
114 Classes  
114 Delete a file
114 Guess the number/With feedback
113 Environment variables
113 Identity matrix
113 Matrix multiplication
113 Matrix transposition
112 Align columns
112 Averages/Median
112 Babbage problem
112 Find limit of recursion
112 Input loop
112 Pick random element
112 String matching
111 Hostname  
111 Letter frequency
111 Random numbers
111 Rename a file
111 Return multiple values
110 Pangram checker
110 Perfect numbers
109 Arithmetic/Complex
109 HTTP  
109 Haversine formula
108 Accumulator factory
107 Assertions
107 Conway's Game of Life
107 Infinity
107 Temperature conversion
106 Catalan numbers
106 Permutations
105 Averages/Pythagorean means
105 Horner's rule for polynomial evaluation
105 Levenshtein distance
105 Program name
105 Substring/Top and tail
105 Variadic function
104 Anonymous recursion
104 Arithmetic-geometric mean
104 Run-length encoding
104 Strip a set of characters from a string
103 Evaluate binomial coefficients
103 Regular expressions
103 Reverse words in a string
102 Exceptions
102 Look-and-say sequence
102 Nth root
102 Prime decomposition
102 String append
102 Strip whitespace from a string/Top and tail
101 Queue/Definition
101 String interpolation (included)
101 Trigonometric functions
100 Combinations
100 Sierpinski triangle
100 Zig-zag matrix
99 Bulls and cows
99 Comma quibbling
99 Ordered words
99 Sorting algorithms/Merge sort
98 Shell one-liner    
98 Short-circuit evaluation
97 24 game  
97 Create a two-dimensional array at runtime
97 Middle three digits
97 Sorting algorithms/Selection sort
97 Sum multiples of 3 and 5
96 Arbitrary-precision integers (included)
96 Call a function
96 Interactive programming    
96 Y combinator
95 Power set  
95 Range expansion
95 Range extraction
95 String prepend
94 Collections
94 Enumerations
94 Sum digits of an integer
93 First-class functions
93 Sorting algorithms/Gnome sort
93 Time a function
93 Vector products
92 Averages/Mode
92 Digital root
92 Evolutionary algorithm
92 Execute Brain****
92 Exponentiation operator
92 Inheritance/Single  
92 MD5
92 The Twelve Days of Christmas
92 Walk a directory/Non-recursively  
91 Create an HTML table
91 N'th
91 One-dimensional cellular automata
91 Sequence of non-squares
91 Sierpinski carpet
91 Sorting algorithms/Cocktail sort
90 JSON  
90 Random number generator (included)
89 Averages/Simple moving average
89 Cumulative standard deviation
89 Sort using a custom comparator
88 Dragon curve
88 Forward difference
88 Hello world/Newbie
88 Langton's ant
88 Monty Hall problem
88 String comparison
88 Symmetric difference
87 Entropy
87 Gray code
87 Josephus problem
87 Sorting algorithms/Bogosort
86 CSV data manipulation
86 Five weekends
86 Hamming numbers
86 Harshad or Niven series
85 Abstract type
85 Abundant, deficient and perfect number classifications
85 Greatest subsequential sum
85 Menu  
85 Number names
84 CSV to HTML translation
84 Compare a list of strings
84 Map range
84 Price fraction
84 Tree traversal  
83 Queue/Usage
83 Window creation      
82 Catamorphism
82 Closures/Value capture
82 File modification time  
82 Hofstadter Q sequence
82 Last Friday of each month
82 Non-decimal radices/Convert
82 Simple windowed application      
82 Sort an array of composite structures
82 Sorting algorithms/Heapsort
82 Walk a directory/Recursively  
81 Monte Carlo methods
81 Number reversal game
81 Set
81 Terminal control/Clear the screen  
80 Amicable pairs
80 Box the compass
80 Calculating the value of e
80 Count in factors
80 Introspection
80 Literals/Floating point  
80 SEDOLs
79 Count the coins
79 Hello world/Line printer    
79 Long multiplication
79 Singly-linked list/Traversal
79 Terminal control/Ringing the terminal bell
79 URL decoding  
78 Bitmap
78 Concurrent computing  
78 Find common directory path
78 Playing cards
78 Read a specific line from a file
78 Roots of unity
78 Show the epoch
78 Spiral matrix
78 Top rank per group
78 Web scraping    
78 XML/Input
77 Address of a variable      
77 CRC-32
77 Floyd's triangle
77 Knapsack problem/0-1
77 Linear congruential generator
77 Multifactorial
77 Operator precedence
77 Order two numerical lists
77 Proper divisors
77 Sockets    
77 Sorting algorithms/Shell sort
77 Word wrap
76 Call an object method    
76 Date manipulation
76 Find the last Sunday of each month
76 Keyboard input/Obtain a Y or N response    
76 Pythagorean triples  
75 Almost prime
75 Dynamic variable names    
75 Here document
75 Jensen's Device
75 Kaprekar numbers
75 Lucas-Lehmer test
75 Man or boy test
75 Repeat  
75 Sorting algorithms/Counting sort
75 Strip comments from a string
75 URL encoding  
74 Anagrams/Deranged anagrams
74 Averages/Mean angle
74 Find the missing permutation
74 List comprehensions
74 Modular inverse
74 Munchausen numbers  
74 Non-decimal radices/Output
74 Parsing/RPN calculator algorithm
73 Fibonacci n-step number sequences
73 Hello world/Web server  
73 Read a configuration file  
73 SHA-1  
73 Semordnilap
73 Sorting algorithms/Comb sort
73 Soundex    
73 Split a character string based on change of character
73 Unicode variable names  
72 Calendar  
72 Empty directory
72 Exceptions/Catch an exception thrown in a nested call
72 Execute HQ9+
72 Gamma function  
72 Multiple distinct objects
72 Phrase reversals  
72 Pi  
72 Population count
72 SHA-256  
72 Singly-linked list/Element definition
72 Write entire file
71 AKS test for primes
71 Animation    
71 Convert seconds to compound duration
71 Equilibrium index
71 Longest common subsequence
71 Special characters  
71 Sudoku  
71 Take notes on the command line  
70 Bitmap/Bresenham's line algorithm
70 Currying
70 Enforced immutability
70 Polymorphism  
70 Rock-paper-scissors      
70 Show ASCII table
70 Vigenère cipher
69 Call a foreign-language function
69 Draw a sphere
69 Euler's sum of powers conjecture
69 Flow-control structures
69 Four bit adder
69 Guess the number/With feedback (player)
69 IBAN
69 Quaternion type  
69 Sort disjoint sublist
69 Stair-climbing puzzle
69 Write float arrays to a text file
68 15 puzzle game      
68 Catalan numbers/Pascal's triangle
68 Combinations with repetitions
68 Constrained random points on a circle
68 Extend your language    
68 Horizontal sundial calculations  
68 Largest int from concatenated ints
68 Maze generation  
68 Numerical integration
68 Old lady swallowed a fly
68 Priority queue
68 Self-describing numbers
68 Sorting algorithms/Stooge sort
68 Trabb Pardo–Knuth algorithm
68 Zeckendorf number representation  
67 Closest-pair problem
67 Euler method
67 Fork  
67 Fractal tree    
67 Jump anywhere
67 Nested function
67 Text processing/Max licenses in use
66 Arithmetic/Rational
66 Benford's law
66 Chinese remainder theorem
66 Magic squares of odd order
66 Named parameters    
66 Special variables    
65 Amb    
65 General FizzBuzz
65 Morse code    
65 One of n lines in a file
65 Optional parameters
65 Remove lines from a file  
65 Runtime evaluation        
65 Sort stability
65 Unix/ls
65 Variable size/Get
64 Barnsley fern      
64 Continued fraction
64 Documentation    
64 Fast Fourier transform
64 Hofstadter-Conway $10,000 sequence
64 Inheritance/Multiple    
64 Narcissistic decimal number
64 Pernicious numbers
64 Sorting algorithms/Pancake sort
64 Strip control codes and extended characters from a string
64 XML/Output
63 Anti-primes
63 HTTPS      
63 Memory allocation
63 Reduced row echelon form
63 Roots of a function
63 Sequence of primes by trial division
63 Singly-linked list/Element insertion
62 Cholesky decomposition
62 Exponentiation order
62 Factors of a Mersenne number
62 Mouse position            
62 Non-decimal radices/Input
62 Probabilistic choice
62 Rep-string
62 Roots of a quadratic function  
62 Thue-Morse  
62 Undefined values    
62 Write language name in 3D ASCII
61 Angle difference between two bearings
61 Animate a pendulum      
61 Circles of given radius through two points
61 Get system command output
61 Globally replace text in several files  
61 Semiprime
61 Sorting algorithms/Sleep sort  
61 Van der Corput sequence  
60 Arithmetic evaluation  
60 Best shuffle
60 Binary strings
60 Department numbers
60 Knapsack problem/Continuous
60 Modular exponentiation
60 Plot coordinate pairs      
60 Runge-Kutta method
59 24 game/Solve  
59 9 billion names of God the integer
59 Averages/Mean time of day
59 Draw a clock    
59 Dutch national flag problem
59 Generator/Exponential
59 Host introspection      
59 Huffman coding
59 Jewels and stones
59 Knapsack problem/Unbounded  
59 Partial function application  
59 Test a function    
59 Tic-tac-toe    
59 Unicode strings  
59 Word frequency  
58 Bitmap/Write a PPM file  
58 Brownian tree  
58 Compile-time calculation  
58 Damm algorithm  
58 Emirp primes
58 Hash join
58 Knight's tour
58 Miller–Rabin primality test  
58 Odd word problem
58 Sort three variables  
58 Truncatable primes
58 User input/Graphical        
58 Yin and yang    
57 4-rings or 4-squares puzzle
57 Add a variable to a class instance at runtime        
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 Matrix-exponentiation operator    
57 Random number generator (device)  
57 Sorting algorithms/Bead sort
57 Two sum  
56 2048    
56 Cartesian product of two or more lists
56 DNS query  
56 Discordian date
56 Doubly-linked list/Element definition
56 Extract file extension  
56 Fibonacci word
56 LZW compression
56 Rosetta Code/Rank languages by popularity  
56 Scope modifiers    
56 Singleton    
56 Stem-and-leaf plot  
56 Stern-Brocot sequence  
56 Terminal control/Coloured text  
56 Terminal control/Display an extended character
56 Truncate a file  
55 Base64 encode data
55 Define a primitive data type    
55 Dinesman's multiple-dwelling problem
55 Extreme floating point values    
55 Forest fire    
55 Ludic numbers
55 Mad Libs
55 Modulinos    
55 Multisplit
55 Munching squares
55 Sorting algorithms/Permutation sort
55 Stack traces    
54 100 prisoners  
54 CUSIP
54 Grayscale image    
54 Long year    
54 Longest common prefix  
54 Quickselect algorithm
54 Runtime evaluation/In an environment        
54 Sierpinski triangle/Graphical    
54 Subleq  
54 Synchronous concurrency  
54 Terminal control/Cursor positioning    
54 Topological sort    
54 XML/XPath      
53 Abundant odd numbers  
53 Convert decimal number to rational  
53 Draw a pixel        
53 Handle a signal  
53 Maximum triangle path sum
53 Non-continuous subsequences
53 Pointers and references  
53 Send email      
53 Ternary logic  
53 Unbias a random generator
53 XML/DOM serialization      
52 Bernoulli numbers
52 First-class functions/Use numbers analogously  
52 Inverted syntax
52 Iterated digits squaring
52 Keyboard input/Keypress check      
52 Longest increasing subsequence
52 Statistics/Basic
52 Text processing/2
51 Determine if a string has all the same characters
51 Gaussian elimination  
51 Longest common substring  
51 Loops/Increment loop index within loop body  
51 Magic 8-ball  
51 Wireworld    
50 Archimedean spiral  
50 Attractive numbers
50 Base64 decode data    
50 Call a function in a shared library    
50 Chinese zodiac  
50 Colour bars/Display    
50 Dijkstra's algorithm  
50 Dining philosophers  
50 FASTA format  
50 Farey sequence
50 GUI component interaction        
50 Heronian triangles
50 Move-to-front algorithm
50 Polynomial regression  
50 Respond to an unknown method call      
50 Seven-sided dice from five-sided dice  
50 Strip block comments
50 Universal Turing machine  
50 Validate International Securities Identification Number  
49 Determine if a string is collapsible
49 Find the intersection of two lines  
49 Fractran  
49 Last letter-first letter
49 Make directory path  
49 Rate counter  
49 Smith numbers
49 Text processing/1  
49 Vector    
48 Doubly-linked list/Element insertion
48 Doubly-linked list/Traversal
48 Greyscale bars/Display        
48 Jaro distance
48 Kernighans large earthquake problem
48 Metaprogramming  
48 Naming conventions    
48 Polymorphic copy    
48 Sattolo cycle  
48 Shoelace formula for polygonal area  
48 Tokenize a string with escaping
47 Append a record to the end of a text file
47 Chaos game        
47 Copy stdin to stdout      
47 Determinant and permanent
47 Echo server        
47 Extensible prime generator
47 History variables  
47 Holidays related to Easter      
47 Longest string challenge    
47 Pascal matrix generation  
47 Perfect shuffle  
47 Pig the dice game    
47 Search a list of records    
47 Stable marriage problem  
47 Zebra puzzle    
46 Average loop length
46 Bitmap/Flood fill  
46 Determine if only one instance is running      
46 Egyptian division  
46 Kronecker product  
46 Narcissist  
46 Polynomial long division    
46 Square but not cube  
46 Water collected between towers
45 Active object      
45 Associative array/Merging    
45 Determine if a string has all unique characters
45 Execute a Markov algorithm  
45 Hofstadter Figure-Figure sequences
45 Image noise  
45 McNuggets problem      
45 OpenGL        
45 Parsing/Shunting-yard algorithm
45 Password generator        
45 RPG attributes generator      
45 Send an unknown method call          
45 Set consolidation  
45 Sort numbers lexicographically      
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 ISBN13 check digit  
44 Rosetta Code/Count examples      
44 Sparkline in unicode
44 Ulam spiral (for primes)  
44 Verify distribution uniformity/Naive  
43 Atomic updates      
43 Bitmap/Read a PPM file    
43 Keyboard input/Flush the keyboard buffer      
43 Knapsack problem/Bounded
43 MD5/Implementation      
43 Sorting algorithms/Radix sort
43 Visualize a tree    
42 Aliquot sequence classifications
42 Cantor set  
42 Digital root/Multiplicative digital root
42 Hickerson series of almost integers
42 Nim game        
42 Percentage difference between images      
42 Spinning rod animation/Text          
42 Subtractive generator  
42 Terminal control/Dimensions        
42 Twelve statements  
42 Van Eck sequence
42 Voronoi diagram  
41 Balanced ternary  
41 Bitmap/Midpoint circle algorithm    
41 Calendar - for "REAL" programmers      
41 Combinations and permutations  
41 Currency    
41 Deepcopy        
41 Fusc sequence
41 Gapful numbers
41 Hilbert curve    
41 Pascal's triangle/Puzzle
41 Permutations/Derangements    
41 Problem of Apollonius  
41 Remove vowels from a string        
41 S-expressions    
41 Speech synthesis            
41 Start from a main routine      
41 Sum to 100  
41 Table creation/Postal addresses      
41 Text between  
41 Variable size/Set  
40 Casting out nines
40 Color of a screen pixel          
40 GUI enabling/disabling of controls          
40 Inverted index    
40 Secure temporary file          
40 Sorting algorithms/Strand sort
40 Summarize and say sequence  
40 Taxicab numbers  
40 Truth table      
40 Variable-length quantity
39 Abbreviations, automatic
39 Brace expansion
39 Colour pinstripe/Display          
39 Cramer's rule
39 Fivenum  
39 Julia set      
39 Knuth's algorithm S
39 Magic squares of doubly even order  
39 Parametric polymorphism      
39 Parsing/RPN to infix conversion
39 Permutations by swapping
39 Prime conspiracy  
39 Sorting Algorithms/Circle Sort  
39 The Name Game    
39 Topswops
39 UTF-8 encode and decode      
38 Break OO privacy    
38 Constrained genericity    
38 Create a file on magnetic tape    
38 Euler's identity  
38 Flipping bits game    
38 LU decomposition
38 Musical scale            
38 Order disjoint list items  
38 Parallel calculations        
38 Permutation test
38 Permutations with repetitions    
38 Primorial numbers    
38 Pythagorean quadruples  
38 Scope/Function names and labels      
37 Abbreviations, easy  
37 Bell numbers  
37 Chowla numbers  
37 Cuban primes  
37 Feigenbaum constant calculation  
37 File extension is in extensions list
37 Find palindromic numbers in both binary and ternary bases  
37 Input/Output for lines of text    
37 Input/Output for pairs of numbers  
37 Kahan summation    
37 Loops/Wrong ranges      
37 Lychrel numbers
37 MAC Vendor Lookup  
37 MD4      
37 Metered concurrency      
37 Object serialization  
37 QR decomposition        
37 Ray-casting algorithm      
37 Read a file character by character/UTF8      
37 Sailors, coconuts and a monkey problem  
37 Sort a list of object identifiers    
37 Statistics/Normal distribution      
37 Terminal control/Hiding the cursor    
37 Terminal control/Inverse video      
37 Vampire number  
36 21 game          
36 Abbreviations, simple
36 Convex hull
36 Days between dates      
36 Events        
36 Fibonacci word/fractal    
36 Floyd-Warshall algorithm  
36 Function prototype    
36 Maze solving    
36 Metronome      
36 Minesweeper game      
36 Numerical integration/Gauss-Legendre Quadrature  
36 Pathological floating point problems          
36 Ranking methods    
36 Solve the no connection puzzle  
36 Substitution cipher    
36 Terminal control/Unicode output          
35 Approximate equality  
35 Arithmetic-geometric mean/Calculate Pi  
35 Bitmap/Bézier curves/Cubic      
35 Bitwise IO    
35 Brazilian numbers  
35 Find the intersection of a line with a plane  
35 Humble numbers
35 Largest number divisible by its digits  
35 Long primes    
35 Multiline shebang          
35 Multiple regression      
35 Penney's game  
35 Pinstripe/Display            
35 RIPEMD-160      
35 Square-free integers  
35 Sutherland-Hodgman polygon clipping      
35 Test integerness  
34 Check output device is a terminal  
34 Conjugate transpose  
34 Determine if a string is squeezable  
34 Display a linear combination  
34 Egyptian fractions  
34 Entropy/Narcissist
34 Idiomatically determine all the lowercase and uppercase letters      
34 Loops/With multiple ranges        
34 Ordered partitions  
34 Pentagram        
34 Recaman's sequence    
34 Totient function  
33 Continued fraction/Arithmetic/Construct from rational number
33 Executable library      
33 Integer roots  
33 Isqrt (integer square root) of X        
33 Negative base numbers    
33 Old Russian measure of length    
33 Parametrized SQL statement            
33 Parse command-line arguments    
33 Pattern matching        
33 RSA code      
33 Rosetta Code/Find bare lang tags            
33 Subset sum problem  
33 Topic variable        
32 Bitcoin/address validation        
32 Bitmap/Bézier curves/Quadratic    
32 Cheryl's birthday  
32 Decimal floating point number to binary    
32 Eban numbers  
32 Execute SNUSP    
32 Factorions    
32 Galton box animation    
32 Mertens function    
32 Multi-dimensional array      
32 Multiplicative order
32 Mutex      
32 Partition an integer x into n primes    
32 Primality by Wilson's theorem      
32 Pythagoras tree          
32 Resistor mesh    
32 Safe primes and unsafe primes    
32 Sorting algorithms/Patience sort
32 Straddling checkerboard  
32 Type detection        
31 Apply a digital filter (direct form II transposed)        
31 Bitmap/Histogram      
31 Check input device is a terminal    
31 Church numerals            
31 Cycle detection    
31 Determine if two triangles overlap        
31 Faulhaber's formula    
31 First class environments  
31 Four is magic      
31 Keyboard macros            
31 Lah numbers
31 Numeric error propagation  
31 Rosetta Code/Find unimplemented tasks        
31 Set puzzle    
31 Solve a Hidato puzzle  
31 Terminal control/Cursor movement            
31 Textonyms  
31 URL parser          
31 Use another language to call a function    
31 Write to Windows event log        
30 Bioinformatics/base count        
30 Chaocipher      
30 Check Machin-like formulas        
30 Deconvolution/1D    
30 Dice game probabilities
30 FTP      
30 Faulhaber's triangle  
30 Implicit type conversion        
30 Koch curve      
30 Mersenne primes        
30 Mian-Chowla sequence      
30 Modular arithmetic    
30 Palindrome dates        
30 Perfect totient numbers    
30 Poker hand analyser      
30 Reflection/List properties        
30 Set of real numbers  
30 Simple database        
30 Xiaolin Wu's line algorithm      
30 Zhang-Suen thinning algorithm    
29 Arena storage pool        
29 Chat server        
29 Checkpoint synchronization    
29 Death Star          
29 Decision tables      
29 Diversity prediction theorem      
29 Draw a rotating cube              
29 Gauss-Jordan matrix inversion      
29 HTTPS/Authenticated          
29 Jacobi symbol    
29 Memory layout of a data structure      
29 Parallel brute force            
29 Pragmatic directives          
29 Terminal control/Preserve screen            
29 Window creation/X11                
29 Word break problem      
28 AVL tree          
28 Bacon cipher    
28 Chemical calculator      
28 Compiler/lexical analyzer              
28 Find first and last set bit of a long integer      
28 Find largest left truncatable prime in a given base      
28 Formal power series        
28 Honeycombs          
28 Ramsey's theorem        
28 Rosetta Code/Fix code tags        
28 Sequence: smallest number greater than previous term with exactly n divisors    
28 Sequence: smallest number with exactly n divisors  
28 State name puzzle  
28 Stream merge      
28 Strong and weak primes    
28 Sum and product puzzle      
28 Update a configuration file        
28 Verify distribution uniformity/Chi-squared test      
27 Active Directory/Connect            
27 Burrows–Wheeler transform  
27 Chebyshev coefficients      
27 Cut a rectangle
27 Extra primes          
27 Go Fish      
27 Law of cosines - triples    
27 Natural sorting      
27 Nautical bell    
27 Palindromic gapful numbers    
27 Paraffins  
27 Peano curve          
27 Polyspiral            
27 Safe addition    
27 Sexy primes        
27 Smarandache prime-digital sequence      
27 Sorting algorithms/Cycle sort    
27 Superellipse          
27 Weird numbers    
27 World Cup group stage    
27 Yellowstone sequence  
26 Angles (geometric), normalization and conversion      
26 Birthday problem    
26 Create an object at a given address            
26 Distributed programming          
26 Fairshare between two and more  
26 First perfect square in base n with n unique digits    
26 First power of 2 that has leading decimal digits of 12    
26 Image convolution          
26 Kronecker product based fractals      
26 Machine code              
26 N-smooth numbers  
26 Nonoblock  
26 Numbers with prime digits whose sum is 13        
26 Perlin noise        
26 Ramer-Douglas-Peucker line simplification      
26 Reflection/List methods          
26 Same fringe        
26 Super-d numbers    
26 Table creation            
26 The ISAAC Cipher        
26 Thiele's interpolation formula    
26 Zumkeller numbers        
25 A* search algorithm          
25 Abelian sandpile model          
25 Card shuffles      
25 Color wheel          
25 Elliptic curve arithmetic  
25 Fermat numbers    
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 Möbius function        
25 RCRPG        
25 Range consolidation        
25 Sequence of primorial primes        
25 Solve a Holy Knight's tour    
25 Stirling numbers of the first kind  
25 Stirling numbers of the second kind  
25 Successive prime differences    
25 Tonelli-Shanks algorithm        
25 Welch's t-test          
25 Yahoo! search interface            
24 Audio alarm            
24 Cipolla's algorithm            
24 Function frequency              
24 Hough transform      
24 K-means++ clustering          
24 Mind boggling card trick      
24 Minimum positive multiple in base 10 using only 0 and 1    
24 Pell's equation      
24 Plasma effect              
24 Play recorded sounds              
24 Sierpinski pentagon          
24 Simulate input/Keyboard              
24 Unprimeable numbers      
23 Base58Check encoding        
23 Circular primes      
23 Create an object/Native demonstration    
23 Deming's Funnel    
23 Elementary cellular automaton/Random Number Generator  
23 Fixed length records          
23 Hunt the Wumpus              
23 List rooted trees    
23 Lucky and even lucky numbers
23 Main step of GOST 28147-89      
23 Make a backup file              
23 Markov chain text generator          
23 Mayan numerals        
23 Monads/Maybe monad        
23 Numbers with equal rises and falls              
23 Parse an IP Address      
23 Percolation/Mean run density      
23 Permutations/Rank of a permutation    
23 Record sound              
23 Reverse the gender of a string          
23 SOAP                
23 Superpermutation minimisation      
23 Teacup rim text        
23 Total circles area  
23 Video display modes                  
23 Words containing "the" substring                
22 Alternade words              
22 Commatizing numbers        
22 Find duplicate files      
22 Find words with alternating vowels and consonants          
22 Finite state machine          
22 Increasing gaps between consecutive Niven numbers      
22 Kolakoski sequence    
22 Linux CPU utilization        
22 Longest common suffix            
22 Matrix chain multiplication            
22 Next highest int from digits      
22 Pierpont primes        
22 Playfair cipher    
22 Pseudo-random numbers/PCG32          
22 Snake and Ladder          
22 Spelling of ordinal numbers            
22 Tau number              
21 Active Directory/Search for a user          
21 De Bruijn sequences      
21 Esthetic numbers          
21 Joystick position                
21 Kosaraju          
21 Magnanimous numbers            
21 Mastermind            
21 Median filter        
21 Numeric separator syntax            
21 Orbital elements          
21 Pig the dice game/Player      
21 Random Latin squares          
21 Reflection/Get source        
21 Shortest common supersequence      
21 Sokoban        
21 Solve a Hopido puzzle      
21 Solve a Numbrix puzzle      
21 Sorting algorithms/Cocktail sort with shifting bounds            
21 Window management                
21 Word wheel          
20 Addition chains            
20 Assertions in design by contract        
20 Data Encryption Standard              
20 Eertree        
20 Find words which contains more than 3 e vowels              
20 Index finite lists of positive integers    
20 Levenshtein distance/Alignment        
20 Long literals, with continuations          
20 Native shebang            
20 Pseudo-random numbers/Xorshift star          
20 Sum of divisors            
20 Tau function              
20 UPC      
20 Vigenère cipher/Cryptanalysis        
20 Vogel's approximation method    
19 ASCII art diagram converter        
19 Abelian sandpile model/Identity        
19 Bilinear interpolation            
19 Bioinformatics/Sequence mutation        
19 Bitcoin/public point to address        
19 Code segment unload              
19 Color quantization          
19 Elementary cellular automaton/Infinite length  
19 K-d tree      
19 Knuth's power tree        
19 Monads/List monad          
19 Montgomery reduction          
19 N-body problem            
19 Names to numbers      
19 Perceptron                
19 Print debugging statement          
19 Readline interface          
19 Simulate input/Mouse                  
19 Strange plus numbers              
19 Sum data type              
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 Line circle intersection        
18 Metallic ratios          
18 Monads/Writer monad          
18 Odd words              
18 Pancake numbers          
18 Percolation/Site percolation        
18 Primes - allocate descendants to their ancestors            
18 SQL-based authentication                
18 Selective file copy                
18 Sierpinski arrowhead curve          
18 Solve triangle solitare puzzle          
18 Transportation problem            
18 Twin primes              
18 Ulam numbers            
17 Bin given limits              
17 Cistercian numerals            
17 Compiler/virtual machine interpreter                
17 Find if a point is within a triangle          
17 Just in time processing on a character stream          
17 Matrix digital rain              
17 NYSIIS        
17 Nested templated data            
17 Nimber arithmetic            
17 P-value correction            
17 Polynomial synthetic division            
17 Prime words            
17 Product of divisors            
17 Proof            
17 Self numbers                
17 Separate the house number from the street name          
17 Zeckendorf arithmetic              
16 Aspect oriented programming                
16 Biorhythms          
16 Bitmap/Read an image through a pipe            
16 Changeable words              
16 Chernick's Carmichael numbers            
16 Free polyominoes enumeration            
16 HTTPS/Client-authenticated              
16 Latin Squares in reduced form          
16 Most frequent k chars distance            
16 Nonogram solver            
16 Padovan sequence            
16 Particle swarm optimization            
16 Percolation/Bond percolation        
16 Percolation/Mean cluster density          
16 Pseudo-random numbers/Splitmix64                
16 Self-hosting compiler              
16 Strange numbers              
16 Tarjan            
16 Terminal control/Positional read                  
16 Vibrating rectangles                  
16 Word search            
15 Bitmap/PPM conversion through a pipe            
15 Change e letters to i in words                
15 Compiler/syntax analyzer                  
15 Cyclotomic polynomial              
15 Find words which contains all the vowels              
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 Peaceful chess queen armies            
15 Rare numbers          
15 Rendezvous              
15 Retrieve and search chat history              
15 Singly-linked list/Element removal                  
15 Snake                
15 Square root by hand              
15 Suffix tree              
15 Words from neighbour ones              
14 Calkin-Wilf sequence              
14 Compare sorting algorithms' performance          
14 Compiler/AST interpreter                
14 Find words which first and last three letters are equals              
14 Four is the number of letters in the ...            
14 Generalised floating point addition          
14 Gradient descent              
14 Jaro-Winkler distance                
14 Logistic curve fitting in epidemiology            
14 Partition function P              
14 Permutations with some identical elements            
14 Ramanujan's constant            
14 Sequence: nth number with exactly n divisors            
14 Topological sort/Extracted top item            
14 XML validation                    
13 Banker's algorithm                
13 Deconvolution/2D+            
13 Exponentiation with infix operators in (or operating on) the base                
13 Factorial base numbers indexing permutations of a collection              
13 Find words which contains most consonants              
13 OpenWebNet password                
13 Pisano period            
13 SHA-256 Merkle tree                
13 Sine wave                
12 Canny edge detector            
12 Continued fraction/Arithmetic/G(matrix ng, continued fraction n)          
12 Greed                
12 Interactive help                
12 Longest palindromic substrings              
12 Minimal steps down to 1              
12 Print itself                
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 Checksumcolor                  
11 Geohash                  
11 Launch rocket with countdown and acceleration in stdout              
11 Minkowski question-mark function              
11 One-time pad                
11 Pentomino tiling                  
11 Railway circuit                  
11 Resistance calculator              
11 Run as a daemon or service                  
11 Sierpinski square curve                
11 Text completion              
11 Tree from nesting levels              
10 Catmull–Clark subdivision surface            
10 Colour pinstripe/Printer                
10 Combinations with repetitions/Square digit chain            
10 Common list elements                
10 Common sorted list                
10 Execute CopyPasta Language                
10 External sort              
10 Faces from a mesh            
10 Find first missing positive                
10 Non-transitive dice                
10 Penrose tiling                    
10 Powerful numbers              
10 Pseudo-random numbers/Combined recursive generator MRG32k3a                  
10 Spoof game                
10 Three word location                  
10 Time-based one-time password algorithm                
10 Unit testing                
10 Using a speech engine to highlight words              
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 Pinstripe/Printer                  
9 Quoting constructs              
9 Resistance network calculator                
9 Rosetta Code/Tasks without examples                
9 Starting a web browser                  
9 Suffixation of decimal numbers                
9 Text to HTML                
9 Tree datastructures              
9 War card game                
8 Count the coins/0-1                  
8 Modified random distribution                
8 Multidimensional Newton-Raphson method                
8 Numerical and alphabetical suffixes                
8 Range modifications                
8 Rosetta Code/Rank languages by number of users                
8 Sort an outline at every level                
8 Untouchable numbers                
8 User defined pipe and redirection operators                
7 16 puzzle game                  
7 Brace expansion using ranges                  
7 Compiler/Verifying syntax                    
7 Elliptic Curve Digital Signature Algorithm                    
7 Fibonacci heap                  
7 Mayan calendar                
7 Pseudorandom number generator image                  
7 Recursive descent parser generator                
7 Robots                  
7 URL shortener                    
6 Bioinformatics/global alignment                  
6 Continued fraction/Arithmetic/G(matrix ng, continued fraction n1, continued fraction n2)                
6 Doubly-linked list/Element removal                  
6 I'm a software engineer, get me out of here                    
6 OpenGL pixel shader                  
6 OpenGL/Utah Teapot                  
6 P-Adic numbers, basic                  
6 Price list behind API                  
6 Remote agent/Agent logic                  
6 Remote agent/Simulation                  
6 Rosetta Code/Run examples                  
6 Smallest enclosing circle problem                  
5 Addition-chain exponentiation                  
5 Audio overlap loop                  
5 Black Box                  
5 Boids                    
5 Chess player                    
5 Hexapawn                    
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 Terminal control/Restricted width positional input/No wrapping                    
5 Terminal control/Restricted width positional input/With wrapping                    
5 Waveform analysis/Doh ray me                    
4 Generalised floating point multiplication                    
4 OLE automation                    
4 P-Adic square roots                  
4 Random sentence from book                    
4 Tamagotchi emulator                    
4 Unicode polynomial equation                  
4 Using the Meetup.com API                    
4 Weather routing                  
4 WiktionaryDumps to words                    
3 Latin Squares in reduced form/Randomizing using Jacobson and Matthews’ Technique                    
3 Rosetta Code/List authors of task descriptions                    
3 Solving coin problems                    
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