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
Kolakoski Sequence
dcc5480
76
10ms
2 mins ago
SI Units
Seek64
🥉
391
39ms
2 mins ago
Star Wars Opening Crawl
bzijlema
304
43ms
3 mins ago
Polygon Triangulations
jusaka
355
10ms
5 mins ago
Highly Composite Numbers
jusaka
253
13ms
5 mins ago
Alphabetic Numbers
jusaka
412
12ms
5 mins ago
Tongue-twisters
jusaka
321
10ms
8 mins ago
Tongue-twisters
roupiq
440
10ms
18 mins ago
Emojify
dcc5480
271
11ms
23 mins ago
CSS Colors
jusaka
631
11ms
24 mins ago
ASCII Table
plcc0
109
10ms
59 mins ago
Rule 110
plcc0
104
19ms
84 mins ago
Game of Life
xiaoyiming123
225
13ms
102 mins ago
Happy Numbers
lelbal
92
73ms
106 mins ago
Happy Numbers (Long)
lelbal
93
322ms
109 mins ago
12 Days of Christmas
dcc5480
512
10ms
113 mins ago
Jacobi Symbol
sean-niemann
132
17ms
2 hours ago
Number Spiral
plcc0
99
10ms
2 hours ago
Gray Code Decoder
lelbal
79
19ms
2 hours ago
Gray Code Encoder
lelbal
🥇
62
15ms
2 hours ago
Gijswijt’s Sequence
lelbal
124
12ms
3 hours ago
Farey Sequence
dcc5480
140
27ms
3 hours ago
Abundant Numbers
dcc5480
70
11ms
3 hours ago
Fibonacci
dcc5480
38
10ms
4 hours ago
Card Number Validation
sultan
132
18ms
4 hours ago
Odious Numbers (Long)
dcc5480
53
11ms
4 hours ago
Odious Numbers
dcc5480
51
10ms
4 hours ago
Evil Numbers (Long)
dcc5480
53
10ms
4 hours ago
ROT13
sultan
71
11ms
4 hours ago
Evil Numbers
dcc5480
51
10ms
4 hours ago
Gray Code Decoder
dcc5480
111
20ms
4 hours ago
Lucky Numbers
dcc5480
111
13ms
5 hours ago
Prime Numbers (Long)
Jonson26
81
3,688ms
5 hours ago
Prime Numbers
Jonson26
79
11ms
5 hours ago
Catalan’s Constant
dcc5480
157
116ms
5 hours ago
Fractions
plcc0
🥇
73
18ms
5 hours ago
Multitap Input
plcc0
122
16ms
6 hours ago
Ordinal Numbers
plcc0
87
12ms
6 hours ago
φ
plcc0
55
61ms
6 hours ago
Abundant Numbers (Long)
dcc5480
71
32ms
7 hours ago
Ascending Primes
dcc5480
150
400ms
7 hours ago
Prime Numbers
dcc5480
68
10ms
7 hours ago
Trinomial Triangle
StefanHabel
85
10ms
8 hours ago
τ
BrunoVisnadi
223
14ms
11 hours ago
Emojify
scpchicken
138
10ms
11 hours ago
brainfuck
scpchicken
185
22ms
12 hours ago
Tutorial
BrunoVisnadi
65
11ms
12 hours ago
ISBN
BrunoVisnadi
102
11ms
12 hours ago
Flags
LostSyntax21
1,419
18ms
14 hours ago
Morse Decoder
solisolu
225
11ms
16 hours ago
Gray Code Decoder
FoxInTheClouds
77
19ms
17 hours ago
Gray Code Encoder
FoxInTheClouds
🥇
62
23ms
17 hours ago
Ascending Primes
FoxInTheClouds
129
4,878ms
17 hours ago
Prime Numbers (Long)
caleblin125
68
3,757ms
18 hours ago
Gray Code Encoder
caleblin125
110
22ms
18 hours ago
Morse Encoder
solisolu
204
10ms
18 hours ago
Gray Code Decoder
caleblin125
87
19ms
18 hours ago
Zodiac Signs
solisolu
189
19ms
18 hours ago
Snake
caleblin125
302
12ms
18 hours ago
Intersection
0dyse
157
11ms
19 hours ago
Jacobi Symbol
0dyse
199
17ms
19 hours ago
Niven Numbers
scpchicken
🥇
44
10ms
20 hours ago
Scrambled Sort
BrunoVisnadi
120
42ms
20 hours ago
Levenshtein Distance
scpchicken
94
34ms
21 hours ago
Spelling Numbers
scpchicken
361
35ms
21 hours ago
ROT13
Jonson26
153
12ms
23 hours ago
Maze
firegene
150
898ms
23 hours ago
Roman to Arabic
sultan
124
21ms
23 hours ago
Game of Life
lelbal
185
208ms
25 hours ago
Arabic to Roman
sultan
148
1,884ms
26 hours ago
Multitap Input
denkyuu1
143
17ms
26 hours ago
Christmas Trees
Zin9zan9
74
10ms
27 hours ago
Intersection
Apfelvater
150
11ms
27 hours ago
Lucky Numbers
lukegustafson
56
11ms
28 hours ago
Niven Numbers (Long)
plcc0
51
15ms
29 hours ago
Collatz
CaedenHarper
69
17ms
31 hours ago
Ten-pin Bowling
Matter1024
267
11ms
31 hours ago
Tongue-twisters
scpchicken
308
10ms
32 hours ago
Happy Numbers (Long)
blaztoma
78
214ms
32 hours ago
Taxicab Numbers
stefangimmillaro
104
508ms
32 hours ago