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
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
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
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
><>
ALGOL 68
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
ArkScript
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
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
ArkScript
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
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
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
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
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
Collatz
FranklinJiaChen
81
9ms
4 hours ago
Foo Fizz Buzz Bar
FranklinJiaChen
142
2ms
4 hours ago
Fizz Buzz
FranklinJiaChen
98
2ms
5 hours ago
Quine
albanian-laundromat
51
2ms
20 hours ago
Odious Numbers
FranklinJiaChen
69
2ms
24 hours ago
Evil Numbers
FranklinJiaChen
69
2ms
24 hours ago
Odious Numbers (Long)
FranklinJiaChen
81
2ms
24 hours ago
Evil Numbers (Long)
FranklinJiaChen
81
2ms
24 hours ago
Emirp Numbers
dokutan
87
2ms
2 days ago
Prime Numbers
WalrusesAreAwesome
97
2ms
2 days ago
Prime Numbers (Long)
WalrusesAreAwesome
99
170ms
2 days ago
Arrows
edsrzf
🥉
105
3ms
3 days ago
ln 2
JOrE20
1,011
2ms
3 days ago
Van Eck Sequence
JOrE20
2,565
1ms
4 days ago
π
Steffan153
🥈
123
259ms
4 days ago
τ
Steffan153
🥈
123
264ms
4 days ago
φ
Steffan153
🥉
124
130ms
4 days ago
𝑒
Steffan153
99
34ms
4 days ago
√2
Steffan153
🥈
124
249ms
4 days ago
Van Eck Sequence
Steffan153
🥇
53
3ms
4 days ago
Rijndael S-box
Steffan153
🥈
173
2ms
4 days ago
Recamán
Steffan153
🥇
66
2ms
4 days ago
ln 2
Steffan153
🥈
118
212ms
4 days ago
Catalan’s Constant
Steffan153
145
391ms
4 days ago
Transpose Sentence
Steffan153
🥇
101
22ms
5 days ago
Partition Numbers
Steffan153
🥇
76
2ms
6 days ago
Prime Numbers (Long)
DialFrost
🥇
64
80ms
6 days ago
Foo Fizz Buzz Bar
Jonson26
169
2ms
6 days ago
Fizz Buzz
Jonson26
110
2ms
6 days ago
Scrambled Sort
frosster
🥉
215
4ms
7 days ago
Evil Numbers (Long)
dokutan
48
2ms
7 days ago
Evil Numbers
dokutan
46
2ms
7 days ago
Odious Numbers
dokutan
46
2ms
7 days ago
Odious Numbers (Long)
dokutan
47
2ms
7 days ago
λ
frosster
738
1ms
8 days ago
γ
frosster
733
2ms
8 days ago
99 Bottles of Beer
frosster
285
2ms
8 days ago
Fibonacci
FranklinJiaChen
🥇
43
2ms
8 days ago
Tic-tac-toe
Blendi-Goose
461
3ms
8 days ago
Happy Numbers
dokutan
102
2ms
9 days ago
Seven Segment
edsrzf
134
2ms
9 days ago
Seven Segment
Steffan153
🥇
129
2ms
10 days ago
Calendar
aadenboy
🥈
281
4ms
10 days ago
Billiards
edsrzf
💎
179
3ms
10 days ago
Polyominoes
snoozingnewt
💎
387
5ms
11 days ago
Prime Numbers (Long)
frosster
74
794ms
12 days ago
Prime Numbers
frosster
47
2ms
12 days ago
Pangram Grep
frosster
102
2ms
12 days ago
Niven Numbers
frosster
53
2ms
12 days ago
Leap Years
frosster
48
2ms
12 days ago
Card Number Validation
frosster
97
2ms
12 days ago
Happy Numbers (Long)
frosster
98
20ms
12 days ago
Divisors
frosster
🥇
68
2ms
12 days ago
Tic-tac-toe
frosster
🥉
124
11ms
12 days ago
Rule 110
Steffan153
🥈
116
2ms
12 days ago
Kolakoski Constant
Steffan153
💎
147
168ms
12 days ago
Pernicious Numbers (Long)
Steffan153
74
10ms
12 days ago
Pascal’s Triangle
Steffan153
🥇
71
1ms
12 days ago
Niven Numbers (Long)
Steffan153
62
3ms
12 days ago
Pangram Grep
Steffan153
97
2ms
12 days ago
Prime Numbers (Long)
Steffan153
🥇
64
466ms
12 days ago
Prime Numbers
Steffan153
🥇
41
2ms
12 days ago
Pernicious Numbers
Steffan153
🥇
41
2ms
12 days ago
Niven Numbers
Steffan153
🥇
46
2ms
12 days ago
Leap Years
Steffan153
46
2ms
12 days ago
Emirp Numbers
Steffan153
73
2ms
12 days ago
Divisors
Steffan153
🥇
68
2ms
12 days ago
Collatz
Steffan153
75
5ms
12 days ago
Christmas Trees
Steffan153
🥉
81
2ms
12 days ago
Happy Numbers
frosster
84
1ms
13 days ago
Evil Numbers
frosster
46
1ms
13 days ago
Odious Numbers (Long)
frosster
47
2ms
13 days ago
Evil Numbers (Long)
frosster
47
2ms
13 days ago
Odious Numbers
frosster
46
2ms
13 days ago
Divisors
Mefred
138
2ms
13 days ago
Multitap Input
frosster
🥈
135
3ms
14 days ago
Collatz
frosster
77
5ms
14 days ago
Inventory Sequence
frosster
80
2ms
14 days ago
ISBN
frosster
🥉
95
2ms
15 days ago
Spelling Numbers
frosster
435
4ms
15 days ago