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
Chars
Time
Submitted
Prime Numbers
DayDun
39
10ms
a min ago
Card Number Validation
retrohun
99
2ms
2 mins ago
Trinomial Triangle
jusaka
132
140ms
5 mins ago
Look and Say
jusaka
143
190ms
7 mins ago
12 Days of Christmas
PlatoHero
446
242ms
11 mins ago
Leyland Numbers
jusaka
156
226ms
17 mins ago
Farey Sequence
jusaka
90
133ms
20 mins ago
Lucky Numbers
jusaka
139
181ms
23 mins ago
Hilbert Curve
blaztoma
💎
332
23ms
25 mins ago
Fizz Buzz
jusaka
101
139ms
29 mins ago
Sierpiński Triangle
plcc0
59
11ms
29 mins ago
Topological Sort
vang1ong7ang
411
198ms
36 mins ago
Fibonacci
Nathan-Masala
23
35ms
37 mins ago
Smith Numbers
jusaka
157
195ms
39 mins ago
SI Units
jusaka
806
238ms
43 mins ago
ln 2
vang1ong7ang
53
19ms
44 mins ago
Niven Numbers
vang1ong7ang
🥇
44
10ms
44 mins ago
Odious Numbers (Long)
vang1ong7ang
🥇
41
11ms
45 mins ago
Odious Numbers
vang1ong7ang
🥇
40
12ms
45 mins ago
Prime Numbers (Long)
vang1ong7ang
🥇
44
123ms
46 mins ago
Pascal’s Triangle
vang1ong7ang
54
10ms
47 mins ago
Quine
vang1ong7ang
🥇
31
29ms
48 mins ago
ROT13
vang1ong7ang
68
11ms
49 mins ago
Trinomial Triangle
vang1ong7ang
64
11ms
50 mins ago
√2
vang1ong7ang
🥇
49
13ms
51 mins ago
𝑒
vang1ong7ang
🥇
48
17ms
52 mins ago
QR Decoder
jusaka
292
160ms
53 mins ago
Quine
vang1ong7ang
🥇
32
338ms
54 mins ago
Factorial Factorisation
vang1ong7ang
148
130ms
57 mins ago
Pernicious Numbers (Long)
jusaka
77
129ms
57 mins ago
99 Bottles of Beer
roelderickx
🥈
283
3ms
58 mins ago
Time Distance
jusaka
364
195ms
62 mins ago
Ascending Primes
vang1ong7ang
134
209ms
63 mins ago
Billiards
jusaka
296
249ms
66 mins ago
Mahjong
jusaka
496
202ms
69 mins ago
Hilbert Curve
blaztoma
💎
666
48ms
79 mins ago
π
jusaka
239
146ms
85 mins ago
Arrows
jusaka
162
152ms
88 mins ago
Star Wars GPT
vang1ong7ang
224
341ms
102 mins ago
φ
jusaka
309
141ms
103 mins ago
Musical Chords
jusaka
283
180ms
115 mins ago
Reverse Polish Notation
jusaka
236
188ms
2 hours ago
DFA Simulator
jusaka
277
215ms
2 hours ago
99 Bottles of Beer
jusaka
347
147ms
2 hours ago
N Queens
jusaka
200
129ms
2 hours ago
Partition Numbers
edsrzf
108
432ms
2 hours ago
Polyominoes
jusaka
345
272ms
2 hours ago
Christmas Trees
PlatoHero
54
266ms
2 hours ago
Catalan’s Constant
vang1ong7ang
268
136ms
2 hours ago
Multitap Input
vang1ong7ang
175
170ms
2 hours ago
CSS Colors
jusaka
784
233ms
2 hours ago
Tower of Hanoi
vang1ong7ang
🥇
71
124ms
2 hours ago
Transpose Sentence
Natanaelel
37
1,195ms
2 hours ago
Medal Tally
vang1ong7ang
193
205ms
2 hours ago
Fibonacci
Nathan-Masala
41
10ms
3 hours ago
Fibonacci
Nathan-Masala
51
9ms
3 hours ago
γ
jusaka
648
129ms
3 hours ago
Niven Numbers
vang1ong7ang
🥇
61
133ms
3 hours ago
Morse Encoder
jusaka
243
167ms
3 hours ago
𝑒
sean-niemann
🥇
70
3,028ms
3 hours ago
Christmas Trees
jusaka
98
139ms
3 hours ago
United States
madex
200
2ms
3 hours ago
Morse Decoder
vang1ong7ang
240
232ms
3 hours ago
United States
madex
153
37ms
3 hours ago
Collatz
snoozingnewt
91
132ms
3 hours ago
Intersection
kumavale
🥉
194
220ms
3 hours ago
Tic-tac-toe
kumavale
🥈
162
151ms
3 hours ago
Morse Encoder
vang1ong7ang
221
162ms
3 hours ago
Arrows
snoozingnewt
167
166ms
4 hours ago
Abundant Numbers (Long)
snoozingnewt
🥇
79
135ms
4 hours ago
Abundant Numbers
snoozingnewt
78
128ms
4 hours ago
Topological Sort
snoozingnewt
🥈
234
171ms
4 hours ago
Minesweeper
snoozingnewt
🥈
217
194ms
4 hours ago
99 Bottles of Beer
Nathan-Masala
331
11ms
4 hours ago
Morse Decoder
jusaka
250
197ms
4 hours ago
Mandelbrot
snoozingnewt
🥉
164
144ms
4 hours ago
Kolakoski Constant
snoozingnewt
🥉
183
154ms
4 hours ago
Intersection
snoozingnewt
195
242ms
4 hours ago
Gray Code Encoder
snoozingnewt
🥉
82
162ms
4 hours ago
Continued Fractions
snoozingnewt
🥉
212
236ms
4 hours ago