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)
Taxicab Numbers
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
Dragon Curve
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Hexagonal Spiral
Highly Composite Numbers
Huffman Encoder
NFA Simulator
Nim
Numbrix
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Rectangle Fill
Semiprime Numbers
Smooth Numbers
Snake
Sphenic 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)
Taxicab Numbers
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
Dragon Curve
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Hexagonal Spiral
Highly Composite Numbers
Huffman Encoder
NFA Simulator
Nim
Numbrix
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Rectangle Fill
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Turtle
Tutorial
Hole
Golfer
Bytes
Time
Submitted
Star Wars Opening Crawl
codereport
🥉
200
34ms
4 hours ago
Poker
codereport
🥉
238
38ms
4 hours ago
DFA Simulator
codereport
128
35ms
4 hours ago
Rock-paper-scissors-Spock-lizard
codereport
🥈
179
33ms
4 hours ago
CSS Colors
codereport
💎
558
33ms
5 hours ago
Farey Sequence
codereport
42
37ms
5 hours ago
Morse Decoder
codereport
🥈
117
35ms
5 hours ago
Spelling Numbers
codereport
🥉
268
35ms
5 hours ago
ROT13
codereport
46
35ms
5 hours ago
Reversi
codereport
🥉
100
33ms
5 hours ago
Kolakoski Constant
codereport
39
38ms
5 hours ago
Arrows
codereport
🥉
73
41ms
5 hours ago
Repeating Decimals
codereport
132
42ms
5 hours ago
Zeckendorf Representation
codereport
69
37ms
5 hours ago
Tic-tac-toe
codereport
🥉
61
39ms
5 hours ago
λ
codereport
🥈
163
272ms
5 hours ago
Sierpiński Triangle
codereport
38
34ms
5 hours ago
Set
codereport
🥈
65
39ms
5 hours ago
Fizz Buzz
codereport
47
33ms
5 hours ago
Billiards
codereport
🥉
65
38ms
5 hours ago
24 Game
codereport
🥈
104
220ms
5 hours ago
Polyominoes
codereport
96
123ms
5 hours ago
Musical Chords
codereport
120
38ms
9 hours ago
SI Units
codereport
🥉
452
61ms
9 hours ago
Cubes
codereport
161
33ms
9 hours ago
Tongue-twisters
codereport
300
37ms
9 hours ago
Hilbert Curve
codereport
🥉
159
37ms
9 hours ago
Sudoku
codereport
302
49ms
9 hours ago
Mahjong
codereport
🥉
164
1,175ms
11 hours ago
Sudoku (Fill-in)
codereport
158
38ms
11 hours ago
QR Decoder
codereport
122
36ms
11 hours ago
Foo Fizz Buzz Bar
codereport
64
39ms
11 hours ago
brainfuck
codereport
🥉
119
43ms
12 hours ago
Emojify
codereport
🥉
103
35ms
13 hours ago
Lucky Tickets
codereport
44
36ms
13 hours ago
Forsyth–Edwards Notation
codereport
🥉
82
34ms
13 hours ago
Catalan’s Constant
codereport
69
1,801ms
13 hours ago
Minesweeper
codereport
71
37ms
13 hours ago
Gijswijt’s Sequence
codereport
48
301ms
13 hours ago
Star Wars GPT
codereport
69
34ms
15 hours ago
Catalan Numbers
firegene
22
35ms
16 hours ago
Partition Numbers
codereport
🥉
34
84ms
16 hours ago
Number Spiral
codereport
35
36ms
16 hours ago
12 Days of Christmas
codereport
🥉
424
34ms
17 hours ago
Medal Tally
codereport
94
48ms
19 hours ago
United States
codereport
136
34ms
19 hours ago
Time Distance
codereport
🥉
199
38ms
19 hours ago
99 Bottles of Beer
codereport
234
36ms
19 hours ago
Ten-pin Bowling
codereport
132
33ms
19 hours ago
Arabic to Roman
codereport
87
46ms
19 hours ago
γ
codereport
🥉
83
4,959ms
19 hours ago
Zodiac Signs
codereport
96
39ms
19 hours ago
Seven Segment
codereport
71
35ms
19 hours ago
ASCII Table
codereport
99
36ms
19 hours ago
Vampire Numbers
codereport
77
4,003ms
19 hours ago
Levenshtein Distance
codereport
87
198ms
19 hours ago
Hexdump
codereport
106
34ms
19 hours ago
Continued Fractions
codereport
🥉
105
37ms
19 hours ago
Rijndael S-box
codereport
🥈
92
38ms
19 hours ago
Reverse Polish Notation
codereport
94
34ms
19 hours ago
Morse Encoder
codereport
🥉
130
36ms
19 hours ago
Proximity Grid
codereport
109
35ms
19 hours ago
Gray Code Decoder
scpchicken
32
38ms
27 hours ago
Pangram Grep
firegene
42
36ms
29 hours ago
Nim
Natanaelel
39
33ms
33 hours ago
Nim
ovs-code
39
34ms
33 hours ago
τ
codereport
🥇
29
36ms
35 hours ago
π
codereport
🥇
27
35ms
35 hours ago
Recamán
codereport
38
33ms
35 hours ago
ln 2
codereport
🥈
32
123ms
35 hours ago
Transpose Sentence
codereport
34
32ms
36 hours ago
Smith Numbers
codereport
39
40ms
37 hours ago
Van Eck Sequence
codereport
🥇
25
35ms
37 hours ago
√2
codereport
🥇
26
33ms
38 hours ago
φ
codereport
24
57ms
38 hours ago
Pascal’s Triangle
codereport
🥇
15
34ms
38 hours ago
Divisors
codereport
🥇
20
34ms
38 hours ago
Gray Code Decoder
firegene
29
37ms
38 hours ago
Star Wars GPT
Natanaelel
61
40ms
40 hours ago
𝑒
codereport
🥇
23
57ms
40 hours ago
Scrambled Sort
codereport
31
34ms
41 hours ago
Niven Numbers (Long)
codereport
32
39ms
41 hours ago
Leyland Numbers
codereport
32
35ms
41 hours ago
Leap Years
codereport
32
34ms
41 hours ago
Fibonacci
codereport
23
33ms
41 hours ago
Semiprime Numbers
codereport
23
36ms
44 hours ago
Trinomial Triangle
codereport
🥉
33
33ms
44 hours ago
Pangram Grep
codereport
38
33ms
44 hours ago
N Queens
codereport
60
51ms
44 hours ago
Mandelbrot
codereport
61
2,204ms
44 hours ago
Lucky Numbers
codereport
🥈
35
53ms
44 hours ago
Kolakoski Sequence
codereport
🥇
24
34ms
44 hours ago
Jacobi Symbol
codereport
🥈
67
45ms
44 hours ago
Intersection
codereport
55
33ms
44 hours ago
Game of Life
codereport
97
35ms
44 hours ago
Factorial Factorisation
codereport
🥈
39
37ms
44 hours ago
Diamonds
codereport
49
33ms
44 hours ago
Collatz
codereport
46
36ms
44 hours ago
Christmas Trees
codereport
36
33ms
44 hours ago
Ascending Primes
codereport
28
1,478ms
44 hours ago