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
Kolakoski Sequence
Arkadios200
81
12ms
a min ago
Star Wars GPT
Mikey-Beep
168
12ms
2 mins ago
Continued Fractions
scpchicken
127
11ms
4 mins ago
Trinomial Triangle
scpchicken
71
11ms
9 mins ago
Ascending Primes
scpchicken
84
16ms
27 mins ago
Gijswijt’s Sequence
scpchicken
130
829ms
29 mins ago
Van Eck Sequence
scpchicken
59
11ms
49 mins ago
√2
Nathan-Masala
68
13ms
60 mins ago
φ
Nathan-Masala
83
12ms
64 mins ago
Calendar
scpchicken
101
17ms
71 mins ago
λ
Nathan-Masala
1,011
10ms
83 mins ago
Zeckendorf Representation
scpchicken
119
12ms
85 mins ago
Niven Numbers
madeforlosers
47
10ms
119 mins ago
Collatz
madeforlosers
73
20ms
2 hours ago
Lucky Tickets
madeforlosers
221
18ms
2 hours ago
Rule 110
Junebug2763
355
25ms
3 hours ago
Collatz
Jakob-L-M
80
24ms
3 hours ago
Day of Week
Jakob-L-M
99
21ms
3 hours ago
Fibonacci
Jakob-L-M
38
11ms
5 hours ago
𝑒
JNedd26
85
17ms
5 hours ago
ISBN
Mikey-Beep
122
11ms
5 hours ago
Collatz
Mikey-Beep
70
20ms
5 hours ago
√2
JNedd26
86
14ms
5 hours ago
Gray Code Decoder
Mikey-Beep
99
17ms
6 hours ago
Gray Code Encoder
Mikey-Beep
🥇
62
16ms
6 hours ago
Game of Life
firegene
123
22ms
9 hours ago
Fizz Buzz
SectorCorruptor
🥇
58
11ms
9 hours ago
Rule 110
Apfelvater
126
13ms
9 hours ago
Happy Numbers (Long)
Mikey-Beep
112
19ms
10 hours ago
Happy Numbers
Mikey-Beep
111
12ms
10 hours ago
Kaprekar Numbers
hiichbindermax
585
10ms
10 hours ago
Fractions
Mikey-Beep
75
19ms
11 hours ago
Ordinal Numbers
StefanHabel
92
12ms
11 hours ago
Gray Code Encoder
cros107
64
15ms
13 hours ago
Collatz
Arkadios200
82
26ms
13 hours ago
Happy Numbers
vang1ong7ang
🥇
62
10ms
14 hours ago
Tower of Hanoi
kevinnaviapaiva
112
12ms
14 hours ago
Leap Years
Junebug2763
71
10ms
15 hours ago
Star Wars GPT
mkikta
164
13ms
16 hours ago
Fractions
Pyroan
90
17ms
18 hours ago
Cubes
Aneesh-5
310
10ms
18 hours ago
Niven Numbers (Long)
JNedd26
60
16ms
20 hours ago
Niven Numbers
JNedd26
58
10ms
20 hours ago
Happy Numbers
JNedd26
126
18ms
20 hours ago
Fizz Buzz
JNedd26
94
17ms
20 hours ago
Divisors
JNedd26
84
11ms
20 hours ago
Collatz
JNedd26
86
26ms
20 hours ago
99 Bottles of Beer
JNedd26
494
11ms
20 hours ago
τ
Andrey2001
92
262ms
21 hours ago
π
Andrey2001
90
259ms
21 hours ago
Trinomial Triangle
mantaslu
71
11ms
21 hours ago
Pernicious Numbers (Long)
MeWhenI
54
16ms
21 hours ago
Pascal’s Triangle
mantaslu
59
11ms
21 hours ago
Farey Sequence
BrunoVisnadi
91
12ms
21 hours ago
Christmas Trees
MeWhenI
71
10ms
22 hours ago
Star Wars GPT
mantaslu
131
24ms
22 hours ago
Continued Fractions
mantaslu
127
10ms
22 hours ago
Minesweeper
firegene
131
36ms
22 hours ago
Card Number Validation
blaztoma
88
17ms
22 hours ago
Arabic to Roman
mantaslu
180
24ms
22 hours ago
12 Days of Christmas
The21zonz
632
10ms
23 hours ago
Levenshtein Distance
ComradeSquirrel
191
439ms
23 hours ago
99 Bottles of Beer
zgialor-lab
319
19ms
23 hours ago
Smith Numbers
Matter1024
156
45ms
24 hours ago
𝑒
Matter1024
65
10ms
25 hours ago
Polyominoes
ahmetdemirag
280
27ms
25 hours ago
Fizz Buzz
zgialor-lab
62
10ms
25 hours ago
Tutorial
Nathan-Masala
69
10ms
25 hours ago
ln 2
Matter1024
71
11ms
25 hours ago
Star Wars GPT
Matter1024
185
13ms
25 hours ago
Kaprekar Numbers
madeforlosers
228
2,092ms
26 hours ago
Happy Numbers
madeforlosers
115
18ms
26 hours ago
Pernicious Numbers
madeforlosers
81
17ms
26 hours ago
Fizz Buzz
mantaslu
59
10ms
26 hours ago
Jacobi Symbol
madeforlosers
185
18ms
26 hours ago
Emirp Numbers
madeforlosers
112
37ms
26 hours ago
Emirp Numbers (Long)
madeforlosers
113
3,682ms
26 hours ago
Happy Numbers (Long)
madeforlosers
116
23ms
26 hours ago
Gijswijt’s Sequence
madeforlosers
146
446ms
26 hours ago
Kolakoski Sequence
madeforlosers
79
12ms
26 hours ago