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
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
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
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
Apéry’s Constant
Binary Lambda Calculus
Connect Four
Continued Fractions
Crossword
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Gray Code Decoder
Gray Code Encoder
Hexagonal Spiral
Highly Composite Numbers
Multitap Input
NFA Simulator
Numbrix
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Taxicab Numbers
Turtle
Tutorial
All Languages
><>
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
ALGOL 68
APL
ArkScript
Arturo
Befunge
BQN
CJam
CoffeeScript
Egel
Fennel
Harbour
Hare
Haxe
Hush
Hy
iogii
Knight
Luau
Odin
Picat
Qore
Racket
Rebol
Rexx
Scala
Squirrel
Stax
Uiua
Umka
Vala
Vyxal
Bytes
Chars
Scoring
Bytes
Chars
Language
All
><>
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
ALGOL 68
APL
ArkScript
Arturo
Befunge
BQN
CJam
CoffeeScript
Egel
Fennel
Harbour
Hare
Haxe
Hush
Hy
iogii
Knight
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
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
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
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
Apéry’s Constant
Binary Lambda Calculus
Connect Four
Continued Fractions
Crossword
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Gray Code Decoder
Gray Code Encoder
Hexagonal Spiral
Highly Composite Numbers
Multitap Input
NFA Simulator
Numbrix
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Taxicab Numbers
Turtle
Tutorial
Hole
Golfer
Bytes
Time
Submitted
Gray Code Decoder
error256
51
326ms
a min ago
Transpose Sentence
codewrite
157
394ms
11 mins ago
Kaprekar Numbers
KatieLG
210
4,884ms
17 mins ago
Arithmetic Numbers
ListeriaM
83
68ms
17 mins ago
Fizz Buzz
ivan-saratovskii
279
298ms
27 mins ago
Diamonds
amazingalek
1,121
341ms
42 mins ago
Gijswijt’s Sequence
amazingalek
2,018
328ms
45 mins ago
Evil Numbers (Long)
ListeriaM
66
2ms
47 mins ago
Odious Numbers (Long)
ListeriaM
65
2ms
48 mins ago
Evil Numbers
ListeriaM
64
11ms
55 mins ago
Maze
blaztoma
🥉
244
602ms
57 mins ago
Trinomial Triangle
77Tigers
75
13ms
64 mins ago
Fibonacci
plcc0
80
255ms
65 mins ago
Fizz Buzz
multikatt
63
10ms
67 mins ago
Fibonacci
plcc0
37
497ms
68 mins ago
Fibonacci
plcc0
68
100ms
73 mins ago
Pernicious Numbers (Long)
noahdorsch
432
991ms
83 mins ago
Prime Numbers (Long)
noahdorsch
301
1,008ms
95 mins ago
Continued Fractions
KasperKivimaeki
125
10ms
106 mins ago
Reverse Polish Notation
frosster
165
3ms
2 hours ago
Rule 110
frosster
153
3ms
2 hours ago
Day of Week
plcc0
90
104ms
2 hours ago
Flags
bitsandbeyond
628
887ms
2 hours ago
Christmas Trees
andrewjc2000
81
10ms
2 hours ago
Kaprekar Numbers
KatieLG
216
2,213ms
2 hours ago
λ
emgordon154
💎
369
1,831ms
2 hours ago
Multitap Input
KasperKivimaeki
101
3ms
2 hours ago
Mandelbrot
error256
97
604ms
2 hours ago
ISBN
frosster
98
2ms
2 hours ago
Kaprekar Numbers
plcc0
236
55ms
2 hours ago
Scrambled Sort
alexsave
132
10ms
2 hours ago
Multitap Input
KasperKivimaeki
192
12ms
3 hours ago
Niven Numbers
yanqui-uxo
48
4ms
3 hours ago
Kaprekar Numbers
2bular
🥈
50
3,297ms
3 hours ago
Gray Code Decoder
error256
59
68ms
3 hours ago
Arabic to Roman
dokutan
202
425ms
3 hours ago
Kaprekar Numbers
2bular
209
3,583ms
3 hours ago
φ
plcc0
57
24ms
4 hours ago
Odious Numbers
ListeriaM
64
2ms
4 hours ago
Continued Fractions
Yax42
157
415ms
4 hours ago
Rule 110
plcc0
105
19ms
4 hours ago
Gray Code Decoder
ovs-code
38
36ms
4 hours ago
Hilbert Curve
namelessiw
339
438ms
4 hours ago
Emojify
arcpolaris
237
438ms
4 hours ago
Recamán
plcc0
68
10ms
4 hours ago
Kolakoski Sequence
plcc0
59
11ms
4 hours ago
Tutorial
jakcharvat
65
10ms
4 hours ago
Taxicab Numbers
tomh1012
229
955ms
4 hours ago
Collatz
arcpolaris
🥉
83
375ms
4 hours ago
Ascending Primes
plcc0
120
1,282ms
5 hours ago
Multitap Input
tomh1012
153
402ms
5 hours ago
Rijndael S-box
plcc0
226
52ms
5 hours ago
Ellipse Perimeters
Yax42
127
414ms
5 hours ago
Tutorial
tomh1012
74
10ms
6 hours ago
Reversi
bzijlema
138
31ms
6 hours ago
Poker
TeodorDyakov
🥈
351
577ms
6 hours ago
Tutorial
tomh1012
76
399ms
6 hours ago
12 Days of Christmas
multikatt
544
10ms
6 hours ago
Divisors
ListeriaM
63
2ms
6 hours ago
Star Wars Opening Crawl
plcc0
295
41ms
7 hours ago
Levenshtein Distance
edsrzf
62
107ms
7 hours ago
Abundant Numbers (Long)
ListeriaM
70
3ms
7 hours ago
Inventory Sequence
77Tigers
62
34ms
7 hours ago
Abundant Numbers
ListeriaM
69
2ms
7 hours ago
Pangram Grep
plcc0
26
3ms
8 hours ago
brainfuck
TeodorDyakov
174
11ms
8 hours ago
Number Spiral
Yax42
150
361ms
8 hours ago
Evil Numbers (Long)
77Tigers
47
17ms
8 hours ago
DFA Simulator
namelessiw
186
392ms
8 hours ago
Evil Numbers (Long)
Tim555
54
11ms
8 hours ago
Scrambled Sort
plcc0
31
3ms
8 hours ago
Gray Code Decoder
aksyristos
82
19ms
8 hours ago
Number Spiral
Yax42
130
9ms
9 hours ago
Mandelbrot
antimon2
🥇
84
629ms
9 hours ago
Leap Years
TeodorDyakov
72
374ms
9 hours ago
Number Spiral
Yax42
134
394ms
9 hours ago
Leap Years
TeodorDyakov
61
2ms
9 hours ago
Prime Numbers
aksyristos
12
39ms
9 hours ago
Minesweeper
Openstreetmapler
304
32ms
10 hours ago
λ
namelessiw
🥉
251
579ms
11 hours ago