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
450
10ms
30 mins ago
Fractions
0dyse
108
20ms
44 mins ago
Jacobi Symbol
snoozingnewt
142
11ms
68 mins ago
Gray Code Encoder
jusaka
🥇
62
16ms
87 mins ago
Gray Code Decoder
cros107
82
1,060ms
104 mins ago
π
mantaslu
112
4,638ms
108 mins ago
Gray Code Encoder
cros107
🥇
62
16ms
114 mins ago
Star Wars GPT
Matter1024
182
12ms
2 hours ago
Odious Numbers
mkikta
46
17ms
2 hours ago
Vampire Numbers
zgialor-lab
140
301ms
2 hours ago
United States
sean-niemann
115
14ms
2 hours ago
Fizz Buzz
mkikta
62
10ms
2 hours ago
Collatz
mkikta
76
27ms
2 hours ago
Rock-paper-scissors-Spock-lizard
zgialor-lab
415
11ms
2 hours ago
Arabic to Roman
mantaslu
177
31ms
3 hours ago
Tower of Hanoi
mantaslu
59
14ms
4 hours ago
Trinomial Triangle
mantaslu
69
12ms
4 hours ago
Pascal’s Triangle
mantaslu
57
11ms
4 hours ago
Polyominoes
ahmetdemirag
276
28ms
4 hours ago
Gray Code Encoder
Apfelvater
66
20ms
6 hours ago
Mahjong
FortuiteMan
532
19ms
8 hours ago
Topological Sort
madex
136
21ms
8 hours ago
Abundant Numbers
rucin93
54
17ms
9 hours ago
brainfuck
Languag3
196
23ms
9 hours ago
Ordinal Numbers
StefanHabel
87
12ms
10 hours ago
N Queens
scpchicken
141
12ms
11 hours ago
Tutorial
JNedd26
92
11ms
11 hours ago
Pangram Grep
JNedd26
88
12ms
11 hours ago
24 Game
scpchicken
208
2,149ms
13 hours ago
QR Decoder
scpchicken
210
19ms
13 hours ago
Tic-tac-toe
scpchicken
119
32ms
13 hours ago
Card Number Validation
scpchicken
118
46ms
15 hours ago
Multitap Input
scpchicken
131
18ms
15 hours ago
Morse Encoder
scpchicken
192
14ms
16 hours ago
Alphabetic Numbers
pardouin
179
14ms
16 hours ago
Gray Code Decoder
klixel
77
19ms
18 hours ago
Gray Code Encoder
FortuiteMan
🥇
62
18ms
18 hours ago
Gray Code Encoder
klixel
🥇
62
17ms
18 hours ago
Gray Code Decoder
FortuiteMan
75
23ms
18 hours ago
Rule 110
Junebug2763
330
27ms
18 hours ago
Fizz Buzz
Junebug2763
104
13ms
18 hours ago
Fibonacci
Junebug2763
59
11ms
18 hours ago
Fibonacci
Arkadios200
41
12ms
19 hours ago
Musical Chords
scpchicken
300
76ms
19 hours ago
Prime Numbers
Mikey-Beep
43
11ms
19 hours ago
Kolakoski Sequence
Arkadios200
81
12ms
20 hours ago
Star Wars GPT
Mikey-Beep
168
14ms
20 hours ago
Continued Fractions
scpchicken
127
11ms
20 hours ago
Trinomial Triangle
scpchicken
71
12ms
20 hours ago
Ascending Primes
scpchicken
84
20ms
20 hours ago
Gijswijt’s Sequence
scpchicken
130
992ms
20 hours ago
Van Eck Sequence
scpchicken
59
15ms
20 hours ago
√2
Nathan-Masala
68
14ms
21 hours ago
φ
Nathan-Masala
83
13ms
21 hours ago
Calendar
scpchicken
101
17ms
21 hours ago
λ
Nathan-Masala
1,011
10ms
21 hours ago
Zeckendorf Representation
scpchicken
119
14ms
21 hours ago
Niven Numbers
madeforlosers
47
12ms
22 hours ago
Collatz
madeforlosers
73
23ms
22 hours ago
Lucky Tickets
madeforlosers
221
25ms
22 hours ago
Collatz
Jakob-L-M
80
29ms
23 hours ago
Day of Week
Jakob-L-M
99
22ms
23 hours ago
Fibonacci
Jakob-L-M
38
17ms
25 hours ago
ISBN
Mikey-Beep
122
14ms
25 hours ago
Collatz
Mikey-Beep
70
31ms
25 hours ago
Gray Code Decoder
Mikey-Beep
99
25ms
26 hours ago
Gray Code Encoder
Mikey-Beep
🥇
62
22ms
26 hours ago
Game of Life
firegene
123
21ms
29 hours ago
Fizz Buzz
SectorCorruptor
🥇
58
12ms
29 hours ago
Rule 110
Apfelvater
126
13ms
29 hours ago
Happy Numbers (Long)
Mikey-Beep
112
20ms
30 hours ago
Happy Numbers
Mikey-Beep
111
16ms
30 hours ago
Kaprekar Numbers
hiichbindermax
585
13ms
30 hours ago
Fractions
Mikey-Beep
75
21ms
31 hours ago
Collatz
Arkadios200
82
31ms
33 hours ago
Happy Numbers
vang1ong7ang
🥇
62
10ms
34 hours ago
Tower of Hanoi
kevinnaviapaiva
112
14ms
34 hours ago
Leap Years
Junebug2763
71
15ms
35 hours ago
Star Wars GPT
mkikta
164
19ms
36 hours ago
Fractions
Pyroan
90
20ms
38 hours ago