Recent Solutions
Achievements
Cheevos
Golfers
Solutions
All Holes
12 Days of Christmas
24 Game
99 Bottles of Beer
Abundant Numbers
Abundant Numbers (Long)
Arabic to Roman
Arithmetic Numbers
Arrows
Ascending Primes
ASCII Table
Billiards
brainfuck
Calendar
Card Number Validation
Catalan Numbers
Catalan’s Constant
Christmas Trees
Collatz
Continued Fractions
CSS Colors
Cubes
Day of Week
DFA Simulator
Diamonds
Divisors
Emirp Numbers
Emirp Numbers (Long)
Emojify
Evil Numbers
Evil Numbers (Long)
Factorial Factorisation
Farey Sequence
Fibonacci
Fizz Buzz
Foo Fizz Buzz Bar
Forsyth–Edwards Notation
Fractions
Game of Life
Gijswijt’s Sequence
Gray Code Decoder
Gray Code Encoder
Happy Numbers
Happy Numbers (Long)
Hexdump
Hilbert Curve
Intersection
Inventory Sequence
ISBN
Jacobi Symbol
Kaprekar Numbers
Kolakoski Constant
Kolakoski Sequence
Leap Years
Levenshtein Distance
Leyland Numbers
ln 2
Look and Say
Lucky Numbers
Lucky Tickets
Mahjong
Mandelbrot
Maze
Medal Tally
Minesweeper
Morse Decoder
Morse Encoder
Multitap Input
Musical Chords
N Queens
Niven Numbers
Niven Numbers (Long)
Number Spiral
Odious Numbers
Odious Numbers (Long)
Ordinal Numbers
PalindromemordnilaP
Pangram Grep
Partition Numbers
Pascal’s Triangle
Pernicious Numbers
Pernicious Numbers (Long)
Poker
Polyominoes
Prime Numbers
Prime Numbers (Long)
Proximity Grid
QR Decoder
Quine
Recamán
Repeating Decimals
Reverse Polish Notation
Reversi
Rijndael S-box
Rock-paper-scissors-Spock-lizard
Roman to Arabic
ROT13
Rule 110
Scrambled Sort
Set
Seven Segment
SI Units
Sierpiński Triangle
Smith Numbers
Spelling Numbers
Star Wars GPT
Star Wars Opening Crawl
Sudoku
Sudoku (Fill-in)
Ten-pin Bowling
Tic-tac-toe
Time Distance
Tongue-twisters
Topological Sort
Tower of Hanoi
Transpose Sentence
Trinomial Triangle
United States
Vampire Numbers
Van Eck Sequence
Zeckendorf Representation
Zodiac Signs
γ
λ
π
τ
φ
√2
𝑒
Alphabetic Numbers
Apéry’s Constant
Binary Lambda Calculus
Connect Four
Crossword
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Hexagonal Spiral
Highly Composite Numbers
NFA Simulator
Numbrix
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Rectangle Fill
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Taxicab Numbers
Turtle
Tutorial
All Languages
><>
ALGOL 68
ArkScript
Assembly
AWK
Bash
BASIC
Berry
brainfuck
C
C#
C++
Civet
Clojure
COBOL
Coconut
Common Lisp
Crystal
D
Dart
Elixir
Erlang
F#
Factor
Forth
Fortran
Gleam
Go
GolfScript
Groovy
Haskell
Hexagony
J
Janet
Java
JavaScript
jq
Julia
K
Kotlin
Lua
Nim
OCaml
Pascal
Perl
PHP
PowerShell
Prolog
Python
R
Raku
Rockstar
Ruby
Rust
Scheme
sed
SQL
Swift
Tcl
TeX
V
VimL
Wren
Zig
05AB1E
APL
Arturo
Befunge
BQN
CJam
CoffeeScript
Egel
Fennel
Harbour
Hare
Haxe
Hush
Hy
iogii
Knight
Lily
Luau
Odin
Picat
Qore
Racket
Rebol
Rexx
Scala
Squirrel
Stax
Uiua
Umka
Vala
Vyxal
Bytes
Chars
Scoring
Bytes
Chars
Language
All
><>
ALGOL 68
ArkScript
Assembly
AWK
Bash
BASIC
Berry
brainfuck
C
C#
C++
Civet
Clojure
COBOL
Coconut
Common Lisp
Crystal
D
Dart
Elixir
Erlang
F#
Factor
Forth
Fortran
Gleam
Go
GolfScript
Groovy
Haskell
Hexagony
J
Janet
Java
JavaScript
jq
Julia
K
Kotlin
Lua
Nim
OCaml
Pascal
Perl
PHP
PowerShell
Prolog
Python
R
Raku
Rockstar
Ruby
Rust
Scheme
sed
SQL
Swift
Tcl
TeX
V
VimL
Wren
Zig
Experimental Language
05AB1E
APL
Arturo
Befunge
BQN
CJam
CoffeeScript
Egel
Fennel
Harbour
Hare
Haxe
Hush
Hy
iogii
Knight
Lily
Luau
Odin
Picat
Qore
Racket
Rebol
Rexx
Scala
Squirrel
Stax
Uiua
Umka
Vala
Vyxal
Hole
All
12 Days of Christmas
24 Game
99 Bottles of Beer
Abundant Numbers
Abundant Numbers (Long)
Arabic to Roman
Arithmetic Numbers
Arrows
Ascending Primes
ASCII Table
Billiards
brainfuck
Calendar
Card Number Validation
Catalan Numbers
Catalan’s Constant
Christmas Trees
Collatz
Continued Fractions
CSS Colors
Cubes
Day of Week
DFA Simulator
Diamonds
Divisors
Emirp Numbers
Emirp Numbers (Long)
Emojify
Evil Numbers
Evil Numbers (Long)
Factorial Factorisation
Farey Sequence
Fibonacci
Fizz Buzz
Foo Fizz Buzz Bar
Forsyth–Edwards Notation
Fractions
Game of Life
Gijswijt’s Sequence
Gray Code Decoder
Gray Code Encoder
Happy Numbers
Happy Numbers (Long)
Hexdump
Hilbert Curve
Intersection
Inventory Sequence
ISBN
Jacobi Symbol
Kaprekar Numbers
Kolakoski Constant
Kolakoski Sequence
Leap Years
Levenshtein Distance
Leyland Numbers
ln 2
Look and Say
Lucky Numbers
Lucky Tickets
Mahjong
Mandelbrot
Maze
Medal Tally
Minesweeper
Morse Decoder
Morse Encoder
Multitap Input
Musical Chords
N Queens
Niven Numbers
Niven Numbers (Long)
Number Spiral
Odious Numbers
Odious Numbers (Long)
Ordinal Numbers
PalindromemordnilaP
Pangram Grep
Partition Numbers
Pascal’s Triangle
Pernicious Numbers
Pernicious Numbers (Long)
Poker
Polyominoes
Prime Numbers
Prime Numbers (Long)
Proximity Grid
QR Decoder
Quine
Recamán
Repeating Decimals
Reverse Polish Notation
Reversi
Rijndael S-box
Rock-paper-scissors-Spock-lizard
Roman to Arabic
ROT13
Rule 110
Scrambled Sort
Set
Seven Segment
SI Units
Sierpiński Triangle
Smith Numbers
Spelling Numbers
Star Wars GPT
Star Wars Opening Crawl
Sudoku
Sudoku (Fill-in)
Ten-pin Bowling
Tic-tac-toe
Time Distance
Tongue-twisters
Topological Sort
Tower of Hanoi
Transpose Sentence
Trinomial Triangle
United States
Vampire Numbers
Van Eck Sequence
Zeckendorf Representation
Zodiac Signs
γ
λ
π
τ
φ
√2
𝑒
Experimental Hole
Alphabetic Numbers
Apéry’s Constant
Binary Lambda Calculus
Connect Four
Crossword
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Hexagonal Spiral
Highly Composite Numbers
NFA Simulator
Numbrix
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Rectangle Fill
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Taxicab Numbers
Turtle
Tutorial
Hole
Golfer
Bytes
Time
Submitted
12 Days of Christmas
jusaka
2,393
9ms
64 mins ago
𝑒
jusaka
1,012
9ms
2 hours ago
Evil Numbers
ComradeSquirrel
52
10ms
4 hours ago
Forsyth–Edwards Notation
non-bin
243
32ms
4 hours ago
ROT13
a6166231
147
14ms
7 hours ago
Topological Sort
madex
160
17ms
7 hours ago
Abundant Numbers
rucin93
🥈
49
9ms
8 hours ago
Prime Numbers
ComradeSquirrel
55
10ms
13 hours ago
Prime Numbers (Long)
ComradeSquirrel
58
87ms
13 hours ago
ISBN
solisolu
83
11ms
21 hours ago
Look and Say
AzertyWasTaken
73
10ms
22 hours ago
Fizz Buzz
TommyP92
62
12ms
27 hours ago
Fibonacci
TommyP92
45
9ms
27 hours ago
99 Bottles of Beer
TommyP92
274
11ms
28 hours ago
Fractions
DayDun
74
140ms
41 hours ago
Fibonacci
Nathan-Masala
37
16ms
44 hours ago
Tutorial
Nathan-Masala
85
27ms
44 hours ago
Continued Fractions
emplv
🥇
94
10ms
45 hours ago
Diamonds
lukegustafson
95
13ms
2 days ago
Taxicab Numbers
voytxt
84
1,865ms
2 days ago
Evil Numbers (Long)
DayDun
60
11ms
3 days ago
Pascal’s Triangle
DayDun
58
9ms
3 days ago
ISBN
DayDun
79
10ms
3 days ago
Ordinal Numbers
DayDun
🥇
66
18ms
3 days ago
Spelling Numbers
voytxt
302
12ms
3 days ago
Fibonacci
ComradeSquirrel
40
15ms
3 days ago
Collatz
ComradeSquirrel
61
12ms
3 days ago
Mahjong
madex
601
14ms
3 days ago
CSS Colors
madex
2,241
11ms
3 days ago
Hilbert Curve
madex
402
14ms
3 days ago
Diamonds
madex
124
10ms
3 days ago
Catalan Numbers
madex
52
10ms
3 days ago
Fibonacci
madex
🥇
33
9ms
3 days ago
Recamán
madex
64
10ms
3 days ago
Pascal’s Triangle
madex
67
11ms
3 days ago
Look and Say
madex
67
11ms
3 days ago
Emirp Numbers
madex
115
10ms
3 days ago
Happy Numbers
madex
76
10ms
3 days ago
Abundant Numbers
madex
57
10ms
3 days ago
Card Number Validation
denkyuu1
110
11ms
4 days ago
Collatz
DayDun
56
12ms
4 days ago
Van Eck Sequence
DayDun
🥇
43
12ms
4 days ago
Quine
DayDun
🥇
25
10ms
4 days ago
brainfuck
DayDun
165
14ms
4 days ago
Gray Code Encoder
stefangimmillaro
🥇
44
13ms
4 days ago
Prime Numbers (Long)
DayDun
🥇
38
60ms
4 days ago
Prime Numbers
DayDun
🥇
36
10ms
5 days ago
Ordinal Numbers
Inbarw100
79
11ms
5 days ago
Gray Code Decoder
stefangimmillaro
56
13ms
5 days ago
√2
ComradeSquirrel
81
21ms
5 days ago
Gray Code Encoder
snoozingnewt
🥇
44
14ms
5 days ago
Fibonacci
Pyroan
45
10ms
5 days ago
Maze
madex
219
17ms
5 days ago
Jacobi Symbol
madex
131
10ms
5 days ago
Morse Encoder
madeforlosers
257
10ms
5 days ago
Continued Fractions
madeforlosers
205
11ms
5 days ago
Calendar
madeforlosers
224
11ms
5 days ago
Game of Life
madeforlosers
344
12ms
5 days ago
Time Distance
madeforlosers
383
11ms
5 days ago
24 Game
madeforlosers
3,455
11ms
5 days ago
Poker
madeforlosers
877
12ms
5 days ago
Fibonacci
DayDun
🥇
33
9ms
5 days ago
π
DayDun
64
12ms
6 days ago
Tutorial
phSHARP
63
12ms
6 days ago
Gray Code Decoder
emplv
🥇
47
14ms
6 days ago
φ
DayDun
53
26ms
6 days ago
𝑒
DayDun
🥇
50
12ms
6 days ago
Tutorial
DayDun
61
15ms
6 days ago
Abundant Numbers
DayDun
54
10ms
7 days ago
Gray Code Decoder
lukegustafson
🥇
47
12ms
7 days ago
Fractions
Inbarw100
90
9ms
7 days ago
99 Bottles of Beer
DayDun
226
10ms
7 days ago
Morse Decoder
Maznek
204
10ms
7 days ago
QR Decoder
voytxt
199
10ms
7 days ago
Gray Code Decoder
voytxt
51
34ms
7 days ago
Gray Code Decoder
madeforlosers
62
38ms
7 days ago
Gray Code Encoder
madeforlosers
🥇
44
11ms
7 days ago
Gray Code Decoder
rucin93
🥇
47
13ms
7 days ago
Hilbert Curve
madeforlosers
504
10ms
7 days ago
Mandelbrot
madeforlosers
211
10ms
7 days ago