Rosetta Code/Count examples/Full list/Tier 3

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Revision as of 16:53, 31 December 2020 by Thundergnat (talk | contribs) (Add third tier of languages by examples completed)
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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 Wren          ㉓ PicoLisp      ㉔ Factor        ㉕ Nim          
    ㉖ Lua           ㉗ Mathematica   ㉘ Ada           ㉙ Common_Lisp   ㉚ Rust         
As of 2020-12-31T16:45:36Z :: Tasks: 1082 :: Draft Tasks:225 :: Total Tasks: 1307 :: Total Examples: 71988
Count Task
477 Hello world/Text
316 99 bottles of beer  
310 100 doors
308 FizzBuzz
282 Factorial
281 Fibonacci sequence
271 Comments
260 A+B
255 Empty program
236 Function definition
226 Loops/Infinite
222 Loops/While
222 Reverse a string
221 Arrays
216 Ackermann function
205 Loops/For
200 Conditional structures  
196 Greatest common divisor
194 Arithmetic/Integer
194 Greatest element of a list
185 Array concatenation
185 Repeat a string
184 Integer comparison
183 Even or odd
182 Averages/Arithmetic mean
181 Increment a numerical string
176 Hello world/Graphical
171 Copy a string
168 Boolean values
167 Loops/Downward for
164 Character codes
163 String concatenation
162 Apply a callback to an array
162 Loops/Do-while
162 Loops/N plus one half
162 Sieve of Eratosthenes
161 Array length
161 Hello world/Newline omission
161 Loops/For with a specified step
161 Loops/Foreach
161 Sum and product of an array
160 String length
158 Binary digits
157 Integer sequence
157 Loops/Break
156 Towers of Hanoi  
155 String case
155 Sum of a series
153 Generic swap
153 Palindrome detection
153 Tokenize a string  
152 Dot product
152 Leap year
152 Logical operations
151 Empty string
151 Hailstone sequence
151 Rot-13
151 Sum of squares
148 Associative array/Creation
148 Filter
145 Execute a system command
145 Quine
145 Sort an integer array
145 Sorting algorithms/Bubble sort
143 Factors of an integer
142 Guess the number
140 Caesar cipher
140 Higher-order functions
140 Remove duplicate elements
139 Determine if a string is numeric
139 File input/output
139 Roman numerals/Encode
139 User input/Text
138 System time  
136 Day of the week
136 Hello world/Standard error
136 Loop over multiple arrays simultaneously
136 Sorting algorithms/Quicksort
135 Bitwise operations
135 Command-line arguments
134 Primality by trial division
133 Luhn test of credit card numbers
133 Read entire file
132 Create a file
131 Loops/Continue
131 Stack
131 Substring
130 Sleep
128 Check that file exists
128 Generate lower case ASCII alphabet
128 Literals/String  
128 Mutual recursion
127 Date format
127 Happy numbers
126 Pascal's triangle
125 Flatten a list
125 Least common multiple
125 Zero to the zero power
123 Binary search
122 ABC problem
122 Balanced brackets
122 Literals/Integer
121 Include a file
121 Loops/Nested
121 Program termination  
120 Compound data type
120 Detect division by zero
120 Ethiopian multiplication
120 Variables    
119 Associative array/Iteration
119 Formatted numeric output
119 Function composition
119 Knuth shuffle
118 Null object
117 Averages/Root mean square
117 Read a file line by line
116 Anagrams
116 File size
116 Hash from two arrays
116 N-queens problem  
116 Search a list
115 Classes  
115 Mandelbrot set  
114 Count in octal
114 Delete a file
114 Sorting algorithms/Insertion sort
113 Case-sensitivity of identifiers
113 Guess the number/With feedback
113 Matrix multiplication
113 Matrix transposition
113 Multiplication tables
113 Real constants and functions
112 Babbage problem
112 Count occurrences of a substring
112 Environment variables
112 Identity matrix
112 Input loop
112 Roman numerals/Decode
112 String matching
111 Averages/Median
111 Hostname
111 Random numbers
110 Align columns
109 Arithmetic/Complex
109 Find limit of recursion
109 HTTP  
109 Haversine formula
109 Perfect numbers
109 Pick random element
109 Rename a file  
108 Accumulator factory
108 Letter frequency
108 Return multiple values
107 Conway's Game of Life  
107 Infinity
106 Catalan numbers
106 Pangram checker
105 Assertions
105 Horner's rule for polynomial evaluation
105 Temperature conversion
104 Arithmetic-geometric mean
104 Averages/Pythagorean means
104 Levenshtein distance
104 Program name
104 Variadic function  
103 Anonymous recursion
103 Evaluate binomial coefficients
103 Permutations  
103 Run-length encoding
103 Strip a set of characters from a string
103 Substring/Top and tail
102 Exceptions
102 Prime decomposition
102 Regular expressions
101 String append
100 Combinations
100 Look-and-say sequence
100 Queue/Definition
100 String interpolation (included)
100 Trigonometric functions  
100 Zig-zag matrix  
99 Comma quibbling
99 Nth root  
99 Reverse words in a string
99 Strip whitespace from a string/Top and tail
98 Short-circuit evaluation
98 Sorting algorithms/Merge sort
97 24 game  
97 Bulls and cows  
97 Sorting algorithms/Selection sort
96 Ordered words
96 Shell one-liner  
96 Sum multiples of 3 and 5
96 Y combinator  
95 Arbitrary-precision integers (included)
95 Call a function
95 Create a two-dimensional array at runtime
95 Interactive programming  
95 Sierpinski triangle  
94 Collections
94 Enumerations
94 Middle three digits
94 Power set  
94 Range extraction  
93 Inheritance/Single    
93 Range expansion
93 String prepend
93 Vector products
92 Create an HTML table
92 Evolutionary algorithm
92 Execute Brain****
92 Exponentiation operator
92 First-class functions
92 Sorting algorithms/Gnome sort
92 Time a function  
91 Averages/Mode
91 Sequence of non-squares
91 Sorting algorithms/Cocktail sort
91 Sum digits of an integer
90 Digital root
90 MD5  
90 Sierpinski carpet
90 The Twelve Days of Christmas  
90 Walk a directory/Non-recursively  
89 Averages/Simple moving average
89 Cumulative standard deviation
89 Random number generator (included)
88 Dragon curve  
88 JSON
88 Langton's ant  
88 One-dimensional cellular automata  
88 Sort using a custom comparator
87 Entropy
87 Forward difference    
87 N'th
87 String comparison
87 Symmetric difference
86 Hamming numbers
86 Josephus problem
86 Monty Hall problem  
86 Sorting algorithms/Bogosort
85 CSV data manipulation
85 Five weekends
85 Gray code
85 Harshad or Niven series
85 Number names
84 Abstract type  
84 CSV to HTML translation
84 Greatest subsequential sum
84 Price fraction
84 Window creation  
83 Compare a list of strings
83 Hello world/Newbie      
83 Sort an array of composite structures
83 Tree traversal  
82 Abundant, deficient and perfect number classifications
82 Closures/Value capture
82 File modification time  
82 Last Friday of each month
82 Map range
82 Menu  
82 Simple windowed application  
81 Sorting algorithms/Heapsort    
80 Box the compass  
80 Introspection    
80 Literals/Floating point
80 Non-decimal radices/Convert
80 Queue/Usage
80 SEDOLs    
79 Amicable pairs
79 Catamorphism
79 Number reversal game
79 Singly-linked list/Traversal  
79 URL decoding  
79 Walk a directory/Recursively  
79 Web scraping    
78 Count in factors
78 Count the coins
78 Hello world/Line printer    
78 Monte Carlo methods  
78 Set
78 Spiral matrix
78 Terminal control/Clear the screen  
78 XML/Input
77 Address of a variable      
77 Bitmap  
77 CRC-32  
77 Calculating the value of e
77 Concurrent computing
77 Find common directory path    
77 Floyd's triangle
77 Knapsack problem/0-1
77 Long multiplication    
77 Playing cards  
77 Read a specific line from a file
77 Roots of unity  
77 Show the epoch
77 Sockets    
77 Sorting algorithms/Shell sort    
77 Terminal control/Ringing the terminal bell
76 Call an object method  
76 Date manipulation    
76 Hofstadter Q sequence  
76 Linear congruential generator
76 Order two numerical lists
76 Top rank per group  
75 Dynamic variable names    
75 Jensen's Device  
75 Kaprekar numbers  
75 Keyboard input/Obtain a Y or N response      
75 Lucas-Lehmer test  
75 Man or boy test  
75 Multifactorial  
75 Pythagorean triples  
75 Sorting algorithms/Counting sort  
75 Strip comments from a string
75 URL encoding  
75 Word wrap  
74 Almost prime
74 Averages/Mean angle
74 Find the last Sunday of each month
74 Here document
74 List comprehensions
74 Proper divisors
73 Fibonacci n-step number sequences
73 Hello world/Web server    
73 Modular inverse  
73 Non-decimal radices/Output
73 Operator precedence  
73 Sorting algorithms/Comb sort  
73 Soundex    
73 Unicode variable names
72 Anagrams/Deranged anagrams
72 Calendar  
72 Find the missing permutation  
72 Semordnilap
72 Singly-linked list/Element definition  
71 AKS test for primes
71 Animation      
71 Empty directory
71 Equilibrium index    
71 Exceptions/Catch an exception thrown in a nested call
71 Gamma function  
71 Longest common subsequence
71 Multiple distinct objects
71 Repeat  
71 SHA-1  
71 SHA-256  
71 Special characters        
71 Sudoku    
71 Take notes on the command line  
71 Write entire file
70 Bitmap/Bresenham's line algorithm
70 Execute HQ9+
70 Parsing/RPN calculator algorithm  
70 Phrase reversals  
70 Pi  
70 Polymorphism    
70 Read a configuration file      
70 Rock-paper-scissors      
70 Split a character string based on change of character
69 Call a foreign-language function  
69 Convert seconds to compound duration
69 Draw a sphere
69 Enforced immutability  
69 Euler's sum of powers conjecture
69 Flow-control structures      
69 Four bit adder  
69 IBAN
69 Quaternion type  
69 Sort disjoint sublist
69 Write float arrays to a text file    
68 15 puzzle game        
68 Constrained random points on a circle
68 Guess the number/With feedback (player)
68 Horizontal sundial calculations      
68 Numerical integration
68 Population count
68 Self-describing numbers
68 Stair-climbing puzzle    
68 Trabb Pardo–Knuth algorithm
68 Vigenère cipher  
67 Catalan numbers/Pascal's triangle
67 Closest-pair problem      
67 Combinations with repetitions    
67 Currying  
67 Fork  
67 Fractal tree    
67 Largest int from concatenated ints
67 Munchausen numbers
67 Show ASCII table      
67 Sorting algorithms/Stooge sort
67 Text processing/Max licenses in use
67 Zeckendorf number representation    
66 Arithmetic/Rational
66 Benford's law
66 Chinese remainder theorem
66 Extend your language
66 Jump anywhere    
66 Maze generation    
65 Amb    
65 Euler method
65 Magic squares of odd order
65 Named parameters  
65 Optional parameters
65 Priority queue
65 Sort stability
65 Special variables        
65 Unix/ls  
64 Continued fraction
64 Documentation  
64 Hofstadter-Conway $10,000 sequence  
64 Inheritance/Multiple    
64 Morse code        
64 One of n lines in a file
64 Runtime evaluation        
64 Variable size/Get    
64 XML/Output
63 Barnsley fern    
63 Fast Fourier transform  
63 General FizzBuzz  
63 Memory allocation    
63 Nested function
63 Remove lines from a file    
63 Roots of a function    
63 Singly-linked list/Element insertion  
63 Strip control codes and extended characters from a string  
62 Cholesky decomposition    
62 Factors of a Mersenne number  
62 HTTPS      
62 Narcissistic decimal number    
62 Pernicious numbers  
62 Roots of a quadratic function    
62 Sorting algorithms/Pancake sort  
62 Undefined values  
62 Write language name in 3D ASCII  
61 Animate a pendulum  
61 Exponentiation order
61 Get system command output
61 Non-decimal radices/Input
61 Probabilistic choice
61 Rep-string  
61 Sorting algorithms/Sleep sort
61 Thue-Morse    
60 Arithmetic evaluation  
60 Binary strings  
60 Circles of given radius through two points      
60 Globally replace text in several files    
60 Knapsack problem/Continuous    
60 Modular exponentiation  
60 Old lady swallowed a fly  
60 Plot coordinate pairs        
60 Reduced row echelon form    
60 Runge-Kutta method      
60 Semiprime
60 Sequence of primes by trial division    
60 Van der Corput sequence    
59 24 game/Solve    
59 9 billion names of God the integer
59 Angle difference between two bearings    
59 Anti-primes  
59 Averages/Mean time of day    
59 Best shuffle    
59 Department numbers  
59 Draw a clock      
59 Host introspection      
59 Knapsack problem/Unbounded  
59 Mouse position      
59 Test a function    
59 Unicode strings    
59 User input/Graphical          
59 Word frequency  
58 Brownian tree  
58 Dutch national flag problem      
58 Emirp primes
58 Huffman coding  
58 Partial function application    
58 Tic-tac-toe          
58 Truncatable primes
58 Yin and yang          
57 Bitmap/Write a PPM file    
57 Compile-time calculation
57 Delegates  
57 Generator/Exponential  
57 Hash join      
57 Knight's tour    
57 Left factorials  
57 Miller–Rabin primality test    
57 Sorting algorithms/Bead sort    
56 2048      
56 4-rings or 4-squares puzzle      
56 Add a variable to a class instance at runtime      
56 Deal cards for FreeCell    
56 Doubly-linked list/Element definition  
56 Draw a cuboid    
56 Fibonacci word  
56 Integer overflow    
56 Jewels and stones        
56 JortSort  
56 Leonardo numbers
56 Matrix-exponentiation operator  
56 Odd word problem    
56 Random number generator (device)    
56 Rosetta Code/Rank languages by popularity          
56 Scope modifiers      
56 Singleton      
56 Sort three variables    
56 Stem-and-leaf plot      
56 Terminal control/Coloured text    
56 Two sum      
55 DNS query    
55 Define a primitive data type    
55 Dinesman's multiple-dwelling problem  
55 Discordian date      
55 Extract file extension    
55 Extreme floating point values  
55 Forest fire  
55 I before E except after C      
55 LZW compression    
55 Mad Libs    
55 Sorting algorithms/Permutation sort    
55 Stack traces    
55 Terminal control/Display an extended character    
54 CUSIP    
54 Cartesian product of two or more lists    
54 Grayscale image    
54 Multisplit    
54 Munching squares      
54 Runtime evaluation/In an environment      
54 Sierpinski triangle/Graphical      
54 Synchronous concurrency      
54 Topological sort        
54 XML/XPath      
53 Base64 encode data    
53 Damm algorithm    
53 Longest common prefix        
53 Pointers and references      
53 Send email        
53 Stern-Brocot sequence        
53 Subleq        
53 Terminal control/Cursor positioning        
53 XML/DOM serialization    
52 100 prisoners    
52 Abundant odd numbers  
52 Bernoulli numbers
52 Draw a pixel      
52 First-class functions/Use numbers analogously
52 Handle a signal          
52 Inverted syntax    
52 Ludic numbers    
52 Maximum triangle path sum
52 Statistics/Basic  
52 Ternary logic    
52 Text processing/2    
52 Truncate a file        
52 Unbias a random generator  
51 Convert decimal number to rational  
51 Iterated digits squaring  
51 Keyboard input/Keypress check            
51 Long year          
51 Modulinos      
51 Quickselect algorithm    
51 Wireworld    
50 Chinese zodiac      
50 Colour bars/Display  
50 Dining philosophers          
50 GUI component interaction          
50 Heronian triangles        
50 Longest increasing subsequence      
50 Loops/Increment loop index within loop body          
50 Non-continuous subsequences        
50 Respond to an unknown method call        
50 Universal Turing machine    
50 Validate International Securities Identification Number      
49 Archimedean spiral    
49 Attractive numbers      
49 Call a function in a shared library      
49 Dijkstra's algorithm    
49 FASTA format
49 Farey sequence    
49 Find the intersection of two lines    
49 Fractran        
49 Gaussian elimination          
49 Seven-sided dice from five-sided dice      
49 Smith numbers  
49 Strip block comments    
49 Text processing/1    
48 Base64 decode data  
48 Doubly-linked list/Element insertion      
48 Doubly-linked list/Traversal          
48 Last letter-first letter    
48 Polymorphic copy      
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 Echo server      
47 Extensible prime generator  
47 Jaro distance          
47 Longest common substring      
47 Make directory path    
47 Metaprogramming    
47 Move-to-front algorithm  
47 Polynomial regression          
47 Rate counter          
47 Vector          
47 Zebra puzzle            
46 Average loop length  
46 Bitmap/Flood fill        
46 Determinant and permanent      
46 Determine if a string has all the same characters  
46 Determine if only one instance is running        
46 Egyptian division  
46 Greyscale bars/Display              
46 Holidays related to Easter    
46 Longest string challenge        
46 Naming conventions      
46 Pascal matrix generation    
46 Sattolo cycle        
46 Search a list of records    
46 Stable marriage problem              
45 Execute a Markov algorithm      
45 History variables    
45 Hofstadter Figure-Figure sequences    
45 Image noise      
45 Magic 8-ball            
45 OpenGL      
45 Password generator          
45 Perfect shuffle    
45 Pig the dice game            
45 Send an unknown method call      
45 Set consolidation    
44 Active object      
44 Carmichael 3 strong pseudoprimes  
44 Copy stdin to stdout    
44 Doubly-linked list/Definition        
44 Element-wise operations  
44 GUI/Maximum window dimensions        
44 Kronecker product        
44 Narcissist      
44 Polynomial long division        
44 Rosetta Code/Count examples      
44 Sort numbers lexicographically  
44 Sparkline in unicode    
43 Atomic updates        
43 Bitmap/Read a PPM file        
43 Determine if a string has all unique characters  
43 Determine if a string is collapsible      
43 Elementary cellular automaton  
43 Knapsack problem/Bounded        
43 Parsing/Shunting-yard algorithm        
43 Sorting algorithms/Radix sort        
43 Ulam spiral (for primes)      
43 Verify distribution uniformity/Naive          
43 Visualize a tree    
42 Aliquot sequence classifications        
42 Associative array/Merging          
42 Bulls and cows/Player      
42 Cantor set        
42 Digital root/Multiplicative digital root    
42 Generate Chess960 starting position        
42 Keyboard input/Flush the keyboard buffer            
42 McNuggets problem      
42 Percentage difference between images      
42 RPG attributes generator            
42 Subtractive generator      
42 Van Eck sequence    
42 Voronoi diagram        
41 Bitmap/Midpoint circle algorithm        
41 Calendar - for "REAL" programmers        
41 Combinations and permutations        
41 Fusc sequence      
41 Hickerson series of almost integers        
41 Hilbert curve      
41 Kernighans large earthquake problem          
41 MD5/Implementation    
41 Nim game      
41 Pascal's triangle/Puzzle      
41 Speech synthesis              
41 Spinning rod animation/Text          
41 Start from a main routine        
41 Sum to 100        
41 Table creation/Postal addresses          
41 Terminal control/Dimensions          
41 Text between            
41 Twelve statements            
41 Variable size/Set          
40 Balanced ternary      
40 Color of a screen pixel          
40 Currency        
40 Deepcopy  
40 GUI enabling/disabling of controls            
40 Gapful numbers            
40 Problem of Apollonius            
40 Secure temporary file          
40 Sorting algorithms/Strand sort        
40 Variable-length quantity        
40 Water collected between towers          
39 Brace expansion        
39 Casting out nines    
39 Cramer's rule  
39 Inverted index          
39 Parametric polymorphism        
39 Permutations/Derangements          
39 S-expressions      
39 Summarize and say sequence      
39 Taxicab numbers        
39 Topswops      
39 UTF-8 encode and decode      
38 Abbreviations, automatic        
38 Break OO privacy      
38 Colour pinstripe/Display    
38 Constrained genericity      
38 Euler's identity  
38 Fivenum        
38 Julia set            
38 Knuth's algorithm S        
38 Musical scale                  
38 Parallel calculations        
38 Prime conspiracy      
38 Primorial numbers      
38 Scope/Function names and labels            
38 Sorting Algorithms/Circle Sort          
38 The Name Game              
37 Chowla numbers        
37 Create a file on magnetic tape        
37 Find palindromic numbers in both binary and ternary bases    
37 Flipping bits game                
37 ISBN13 check digit        
37 Kahan summation              
37 Magic squares of doubly even order          
37 Order disjoint list items      
37 Parsing/RPN to infix conversion        
37 Permutations by swapping        
37 Pythagorean quadruples        
37 QR decomposition              
37 Ray-casting algorithm          
37 Sailors, coconuts and a monkey problem              
37 Sort a list of object identifiers    
37 Statistics/Normal distribution            
37 Vampire number        
36 21 game            
36 Abbreviations, easy          
36 Bell numbers  
36 Cuban primes    
36 Days between dates      
36 Events        
36 Feigenbaum constant calculation          
36 Fibonacci word/fractal        
36 File extension is in extensions list        
36 Function prototype          
36 Input/Output for lines of text              
36 Input/Output for pairs of numbers              
36 LU decomposition        
36 Lychrel numbers        
36 MAC Vendor Lookup  
36 Metered concurrency            
36 Numerical integration/Gauss-Legendre Quadrature        
36 Object serialization        
36 Pathological floating point problems        
36 Permutation test        
36 Read a file character by character/UTF8      
36 Square but not cube        
36 Terminal control/Hiding the cursor          
36 Terminal control/Inverse video        
35 Abbreviations, simple          
35 Approximate equality      
35 Bitmap/Bézier curves/Cubic        
35 Bitwise IO          
35 Brazilian numbers          
35 Find the intersection of a line with a plane        
35 Floyd-Warshall algorithm              
35 Largest number divisible by its digits        
35 MD4    
35 Minesweeper game          
35 Multiline shebang          
35 Permutations with repetitions              
35 Pinstripe/Display          
35 Solve the no connection puzzle              
35 Substitution cipher        
35 Terminal control/Unicode output          
35 Test integerness        
35 Truth table          
34 Arithmetic-geometric mean/Calculate Pi      
34 Conjugate transpose    
34 Convex hull      
34 Display a linear combination          
34 Egyptian fractions          
34 Entropy/Narcissist      
34 Long primes          
34 Loops/Wrong ranges              
34 Maze solving            
34 Ordered partitions      
34 Penney's game              
34 Sutherland-Hodgman polygon clipping          
33 Check output device is a terminal        
33 Continued fraction/Arithmetic/Construct from rational number      
33 Determine if a string is squeezable      
33 Executable library    
33 Humble numbers          
33 Integer roots          
33 Loops/With multiple ranges              
33 Parametrized SQL statement              
33 Parse command-line arguments          
33 Pentagram            
33 RIPEMD-160      
33 Ranking methods              
33 Recaman's sequence              
33 Remove vowels from a string            
33 Rosetta Code/Find bare lang tags                  
33 Square-free integers          
33 Topic variable            
33 Totient function    
32 Bitcoin/address validation        
32 Bitmap/Bézier curves/Quadratic        
32 Cheryl's birthday        
32 Execute SNUSP      
32 Factorions            
32 Idiomatically determine all the lowercase and uppercase letters            
32 Metronome          
32 Mutex            
32 Pythagoras tree                
32 Sorting algorithms/Patience sort            
32 Subset sum problem          
32 Type detection          
32 URL parser            
31 Apply a digital filter (direct form II transposed)        
31 Bitmap/Histogram        
31 Cycle detection            
31 Decimal floating point number to binary            
31 Determine if two triangles overlap              
31 Eban numbers          
31 First class environments        
31 Galton box animation                
31 Multi-dimensional array            
31 Multiple regression            
31 Multiplicative order          
31 Negative base numbers          
31 Numeric error propagation      
31 Pattern matching              
31 RSA code          
31 Resistor mesh            
31 Rosetta Code/Find unimplemented tasks          
31 Set puzzle              
31 Straddling checkerboard                
31 Terminal control/Cursor movement            
31 Textonyms          
31 Write to Windows event log                  
30 Check Machin-like formulas            
30 Check input device is a terminal          
30 Faulhaber's formula          
30 Faulhaber's triangle          
30 Implicit type conversion              
30 Keyboard macros                
30 Koch curve        
30 Mersenne primes            
30 Partition an integer x into n primes            
30 Poker hand analyser              
30 Reflection/List properties                
30 Simple database                
30 Solve a Hidato puzzle                
30 Use another language to call a function              
30 Xiaolin Wu's line algorithm                
29 Arena storage pool        
29 Chaocipher        
29 Chat server            
29 Checkpoint synchronization              
29 Death Star            
29 Dice game probabilities        
29 Draw a rotating cube            
29 FTP          
29 Memory layout of a data structure            
29 Old Russian measure of length            
29 Palindrome dates          
29 Parallel brute force          
29 Perfect totient numbers          
29 Pragmatic directives        
29 Terminal control/Preserve screen          
29 Window creation/X11              
29 Zhang-Suen thinning algorithm              
28 AVL tree          
28 Bacon cipher                
28 Bioinformatics/base count            
28 Church numerals              
28 Compiler/lexical analyzer              
28 Deconvolution/1D          
28 Diversity prediction theorem          
28 HTTPS/Authenticated            
28 Jacobi symbol            
28 Mian-Chowla sequence            
28 Modular arithmetic          
28 Safe primes and unsafe primes              
28 Sequence: smallest number greater than previous term with exactly n divisors          
28 Sequence: smallest number with exactly n divisors            
28 Set of real numbers              
28 Stream merge                
28 Word break problem          
27 Active Directory/Connect                
27 Burrows–Wheeler transform          
27 Chebyshev coefficients              
27 Chemical calculator            
27 Decision tables              
27 Find first and last set bit of a long integer            
27 Find largest left truncatable prime in a given base              
27 Formal power series          
27 Four is magic        
27 Honeycombs              
27 Lah numbers            
27 Paraffins              
27 Peano curve          
27 Polyspiral                  
27 Primality by Wilson's theorem              
27 Ramsey's theorem              
27 Rosetta Code/Fix code tags            
27 Safe addition          
27 Sorting algorithms/Cycle sort              
27 State name puzzle                
27 Sum and product puzzle            
27 Superellipse            
27 Update a configuration file                  
27 Verify distribution uniformity/Chi-squared test              
27 Weird numbers            
27 Yellowstone sequence          
26 Angles (geometric), normalization and conversion        
26 Cut a rectangle            
26 Distributed programming          
26 Fairshare between two and more        
26 First power of 2 that has leading decimal digits of 12            
26 Go Fish                
26 Law of cosines - triples            
26 Natural sorting                
26 Nautical bell                  
26 Palindromic gapful numbers          
26 Reflection/List methods              
26 Same fringe            
26 Smarandache prime-digital sequence          
26 Strong and weak primes            
26 Table creation              
26 Thiele's interpolation formula        
25 Birthday problem                  
25 Card shuffles                
25 Color wheel            
25 Create an object at a given address            
25 First perfect square in base n with n unique digits              
25 Fraction reduction              
25 Image convolution            
25 Kronecker product based fractals        
25 Length of an arc between two angles              
25 N-smooth numbers            
25 RCRPG              
25 Sequence of primorial primes              
25 Sexy primes          
25 Super-d numbers            
25 The ISAAC Cipher              
24 Abelian sandpile model            
24 Audio alarm                  
24 Elliptic curve arithmetic            
24 Fermat numbers          
24 Gauss-Jordan matrix inversion              
24 Isqrt (integer square root) of X              
24 K-means++ clustering            
24 Machine code            
24 Pell's equation              
24 Perlin noise          
24 Plasma effect              
24 Play recorded sounds              
24 Ramer-Douglas-Peucker line simplification              
24 Range consolidation              
24 Sierpinski pentagon            
24 Simulate input/Keyboard              
24 Solve a Holy Knight's tour                
24 Stirling numbers of the second kind              
24 Successive prime differences              
24 Unprimeable numbers          
24 Welch's t-test                
24 World Cup group stage                
24 Yahoo! search interface                
23 A* search algorithm            
23 Circular primes          
23 Deming's Funnel          
23 Fixed length records            
23 Function frequency          
23 Generate random chess position              
23 Hough transform                
23 Idiomatically determine all the characters that can be used for symbols                
23 Magic squares of singly even order              
23 Main step of GOST 28147-89            
23 Make a backup file                
23 Markov chain text generator          
23 Minimum positive multiple in base 10 using only 0 and 1              
23 Monads/Maybe monad              
23 Möbius function              
23 Numbers with prime digits whose sum is 13                
23 Record sound            
23 SOAP                  
23 Stirling numbers of the first kind              
23 Superpermutation minimisation              
23 Teacup rim text            
23 Video display modes                    
23 Zumkeller numbers              
22 Base58Check encoding                
22 Cipolla's algorithm                
22 Create an object/Native demonstration              
22 Elementary cellular automaton/Random Number Generator              
22 Find duplicate files          
22 Intersecting number wheels                  
22 Linux CPU utilization                  
22 Lucky and even lucky numbers                
22 Mind boggling card trick            
22 Nonoblock                  
22 Parse an IP Address                
22 Percolation/Mean run density              
22 Permutations/Rank of a permutation                  
22 Pierpont primes            
22 Reverse the gender of a string                
22 Spelling of ordinal numbers          
22 Tonelli-Shanks algorithm              
22 Total circles area                
21 Active Directory/Search for a user                  
21 Alternade words              
21 Commatizing numbers              
21 De Bruijn sequences              
21 Hunt the Wumpus                
21 Joystick position                
21 Kolakoski sequence              
21 Magnanimous numbers            
21 Matrix chain multiplication            
21 Numbers with equal rises and falls                
21 Orbital elements                
21 Pig the dice game/Player              
21 Playfair cipher                  
21 Reflection/Get source              
21 Sorting algorithms/Cocktail sort with shifting bounds              
21 Window management              
20 Addition chains                  
20 Data Encryption Standard                  
20 Eertree                  
20 List rooted trees                
20 Longest common suffix                
20 Mastermind              
20 Median filter              
20 Native shebang                  
20 Next highest int from digits              
20 Numeric separator syntax              
20 Random Latin squares                  
20 Shortest common supersequence                
20 Snake and Ladder                
20 Sokoban                  
20 Solve a Hopido puzzle                    
20 Solve a Numbrix puzzle                    
19 Assertions in design by contract                    
19 Bilinear interpolation                  
19 Bioinformatics/Sequence mutation            
19 Color quantization            
19 Esthetic numbers            
19 Finite state machine                  
19 Index finite lists of positive integers                
19 Kosaraju              
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 Sunflower fractal                
19 UPC              
19 Untrusted environment              
19 Vogel's approximation method                
18 Arithmetic coding/As a generalized change of radix                  
18 Bitcoin/public point to address            
18 Code segment unload                    
18 Compiler/code generator                  
18 Draw pixel 2              
18 EKG sequence convergence            
18 Elementary cellular automaton/Infinite length                
18 Find URI in text                  
18 K-d tree                
18 Knuth's power tree                
18 Monads/Writer monad              
18 SQL-based authentication                
18 Selective file copy                  
18 Sierpinski arrowhead curve            
18 Solve triangle solitare puzzle                
18 Sum data type              
18 Transportation problem                    
18 Twin primes              
18 Vigenère cipher/Cryptanalysis                
17 15 puzzle solver            
17 ABC words                  
17 Abelian sandpile model/Identity          
17 Canonicalize CIDR            
17 Compiler/syntax analyzer                  
17 Compiler/virtual machine interpreter                  
17 File size distribution            
17 Imaginary base numbers                
17 Increasing gaps between consecutive Niven numbers                
17 Just in time processing on a character stream                    
17 Levenshtein distance/Alignment            
17 Mertens function              
17 Metallic ratios              
17 P-value correction                    
17 Percolation/Site percolation                
17 Primes - allocate descendants to their ancestors                  
17 Proof                  
17 Separate the house number from the street name                
17 Zeckendorf arithmetic                  
16 ASCII art diagram converter              
16 Aspect oriented programming                  
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 Line circle intersection                  
16 Matrix digital rain                
16 Most frequent k chars distance                  
16 NYSIIS                  
16 Nested templated data                  
16 Odd words              
16 Particle swarm optimization                    
16 Polynomial synthetic division                  
16 Self-hosting compiler                
16 Terminal control/Positional read                  
16 Word search                    
16 Word wheel                
15 Bitmap/PPM conversion through a pipe              
15 Geometric algebra                    
15 Mayan numerals              
15 Nonogram solver                  
15 Numerical integration/Adaptive Simpson's method              
15 Percolation/Bond percolation                    
15 Percolation/Mean cluster density                  
15 Prime words              
15 Rendezvous                
15 Retrieve and search chat history                  
15 Self numbers                  
15 Singly-linked list/Element removal                
15 Snake                  
15 Suffix tree                  
15 Tau function                
15 Words containing "the" substring                  
14 Biorhythms              
14 Compare sorting algorithms' performance                  
14 Compiler/AST interpreter                  
14 Cyclotomic polynomial                
14 Extra primes              
14 Functional coverage tree                
14 Generalised floating point addition                  
14 Gradient descent                  
14 Jaro-Winkler distance                
14 Latin Squares in reduced form                  
14 Logistic curve fitting in epidemiology                  
14 Peaceful chess queen armies                    
14 Permutations with some identical elements              
14 Rare numbers                  
14 Square root by hand                  
14 Tarjan                
14 Vibrating rectangles                  
14 XML validation                  
13 Cistercian numerals              
13 Deconvolution/2D+                
13 Find if a point is within a triangle                
13 Four is the number of letters in the ...                  
13 Long literals, with continuations                
13 Nimber arithmetic              
13 Pisano period              
13 Pseudo-random numbers/PCG32                
13 Ramanujan's constant                  
13 Sequence: nth number with exactly n divisors                
13 Sine wave                    
13 Topological sort/Extracted top item                    
12 Banker's algorithm                  
12 Calkin-Wilf sequence              
12 Canny edge detector                
12 Continued fraction/Arithmetic/G(matrix ng, continued fraction n)                    
12 Factorial base numbers indexing permutations of a collection                
12 Getting the number of decimals                  
12 Interactive help              
12 Longest palindromic substrings                  
12 OpenWebNet password                    
12 Print itself                  
12 Product of divisors                
12 Pseudo-random numbers/Splitmix64              
12 Safe mode                
12 Sierpinski curve              
12 Simulated annealing                
12 Tau number                
12 Ulam numbers                  
11 Audio frequency generator                    
11 Exponentiation with infix operators in (or operating on) the base                
11 Geohash              
11 Greed                
11 Merge and aggregate datasets                  
11 Minimal steps down to 1                  
11 Pancake numbers                  
11 Partition function P              
11 Pentomino tiling                    
11 Pseudo-random numbers/Xorshift star                
11 Run as a daemon or service                
11 Sierpinski square curve              
11 Sorting algorithms/Tree sort on a linked list                    
11 Sum of divisors                
11 Tetris                  
11 Text completion                
11 VList                    
11 XXXX redacted                
10 Almkvist-Giullera formula for pi                
10 Catmull–Clark subdivision surface                
10 Checksumcolor                
10 Colour pinstripe/Printer                
10 Execute CopyPasta Language                    
10 External sort                    
10 Faces from a mesh                
10 Launch rocket with countdown and acceleration in stdout                  
10 One-time pad                    
10 Penrose tiling                  
10 Powerful numbers                
10 Railway circuit                    
10 Resistance calculator                
10 SHA-256 Merkle tree                
10 Spoof game                    
10 Time-based one-time password algorithm                  
10 Unit testing                    
10 Using a speech engine to highlight words                  
9 Combinations with repetitions/Square digit chain                    
9 Curve that touches three points                  
9 Display an outline as a nested table                  
9 Fibonacci matrix-exponentiation                  
9 French Republican calendar                  
9 IPC via named pipe                  
9 Morpion solitaire                    
9 Non-transitive dice                
9 Parse EBNF                  
9 Pinstripe/Printer                  
9 Quoting constructs                  
9 Rosetta Code/Tasks without examples                    
9 Starting a web browser                    
9 Suffixation of decimal numbers                    
9 Text to HTML                  
9 Three word location                  
8 Hourglass puzzle                  
8 Minkowski question-mark function                
8 Numerical and alphabetical suffixes                  
8 Range modifications                  
8 Resistance network calculator                  
8 Rosetta Code/Rank languages by number of users                    
8 Sort an outline at every level                  
8 Tree datastructures                    
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 Graph colouring                    
7 Mayan calendar                  
7 Multidimensional Newton-Raphson method                    
7 Pseudo-random numbers/Combined recursive generator MRG32k3a                
7 Pseudorandom number generator image                
7 Robots                    
7 Two bullet roulette                
7 URL shortener                  
6 Continued fraction/Arithmetic/G(matrix ng, continued fraction n1, continued fraction n2)                    
6 Doubly-linked list/Element removal                  
6 OpenGL pixel shader                    
6 OpenGL/Utah Teapot                    
6 Recursive descent parser generator                    
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 I'm a software engineer, get me out of here                    
5 Price list behind API                  
5 Process SMIL directives in XML data                    
5 Raster bars                  
5 Remote agent/Agent interface                  
5 Remote agent/Agent logic                  
5 Remote agent/Simulation                  
5 Solve a Rubik's Cube                  
5 Terminal control/Restricted width positional input/No wrapping                  
5 Terminal control/Restricted width positional input/With wrapping                  
5 War card game                  
5 Waveform analysis/Doh ray me                    
4 Generalised floating point multiplication                    
4 OLE automation                    
4 Strassen's algorithm                  
4 Tamagotchi emulator                    
4 Unicode polynomial equation                  
4 Using the Meetup.com API                    
4 Weather routing                  
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                    
3 WiktionaryDumps to words                    
2 15 puzzle game in 3D                    
2 CLI-based maze-game                    
2 IRC gateway                    
1 Blackjack strategy