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Recent Solutions
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Cheevos
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12 Days of Christmas
24 Game
99 Bottles of Beer
Abundant Numbers
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Arrows
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Billiards
brainfuck
Calendar
Card Number Validation
Catalan Numbers
Catalan’s Constant
Christmas Trees
Collatz
Connect Four
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
Apéry’s Constant
Binary Lambda Calculus
Chess960 Decoder
Chess960 Encoder
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
Ulam Sequence
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><>
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
iogii
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
Knight
Lily
Luau
Odin
Picat
Qore
Racket
Rebol
Rexx
Scala
Squirrel
Stax
Uiua
Umka
Vala
Vyxal
ZuzuScript
Hole
All
12 Days of Christmas
24 Game
99 Bottles of Beer
Abundant Numbers
Abundant Numbers (Long)
Alphabetic Numbers
Arabic to Roman
Arithmetic Numbers
Arrows
Ascending Primes
ASCII Table
Billiards
brainfuck
Calendar
Card Number Validation
Catalan Numbers
Catalan’s Constant
Christmas Trees
Collatz
Connect Four
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
Apéry’s Constant
Binary Lambda Calculus
Chess960 Decoder
Chess960 Encoder
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
Ulam Sequence
Hole
Golfer
Chars
Time
Submitted
Jacobi Symbol
DialFrost
🥉
208
3ms
14 hours ago
Nim
edsrzf
141
3ms
2 days ago
Seven Segment
edsrzf
🥈
150
2ms
3 days ago
γ
retrohun
1,018
2ms
5 days ago
Gray Code Decoder
DialFrost
🥇
94
6ms
6 days ago
Hexdump
edsrzf
🥈
260
62ms
9 days ago
ROT13
CaedenHarper
135
4ms
11 days ago
Taxicab Numbers
CaedenHarper
130
196ms
13 days ago
Tic-tac-toe
CaedenHarper
157
5ms
14 days ago
Seven Segment
Openstreetmapler
222
3ms
15 days ago
Connect Four
msbranicky
599
43ms
16 days ago
Seven Segment
Matter1024
216
3ms
17 days ago
Seven Segment
KasperKivimaeki
699
2ms
17 days ago
Seven Segment
prestosilver
311
2ms
18 days ago
Seven Segment
aksyristos
424
3ms
19 days ago
Seven Segment
jared-hughes
205
3ms
19 days ago
Lucky Tickets
albanian-laundromat
🥇
187
97ms
19 days ago
QR Decoder
CaedenHarper
222
3ms
19 days ago
Connect Four
madex
377
62ms
19 days ago
Seven Segment
madex
203
4ms
19 days ago
Leap Years
denkyuu1
60
3ms
20 days ago
Seven Segment
denkyuu1
298
3ms
20 days ago
τ
CaedenHarper
167
1,151ms
20 days ago
π
CaedenHarper
169
1,199ms
20 days ago
Quine
CaedenHarper
🥉
90
3ms
20 days ago
Kaprekar Numbers
CaedenHarper
🥉
84
4,625ms
20 days ago
Cubes
CaedenHarper
🥉
215
3ms
20 days ago
Seven Segment
CornerMercury
189
2ms
20 days ago
Seven Segment
bitsandbeyond
193
2ms
21 days ago
Seven Segment
BREMAUCY
209
3ms
21 days ago
99 Bottles of Beer
CaedenHarper
246
5ms
21 days ago
Hexdump
CaedenHarper
🥉
297
4ms
21 days ago
12 Days of Christmas
CaedenHarper
346
3ms
21 days ago
CSS Colors
CaedenHarper
599
5ms
21 days ago
λ
CaedenHarper
410
3ms
21 days ago
γ
CaedenHarper
419
3ms
21 days ago
Day of Week
CaedenHarper
🥉
225
5ms
21 days ago
Lucky Tickets
CaedenHarper
🥇
187
8ms
21 days ago
Seven Segment
Steffan153
💎
145
2ms
21 days ago
Mahjong
CaedenHarper
💎
234
24ms
21 days ago
Rijndael S-box
CaedenHarper
💎
199
109ms
21 days ago
Seven Segment
HumanoidCPU
380
2ms
21 days ago
Sudoku
CaedenHarper
💎
360
84ms
21 days ago
Seven Segment
Natanaelel
213
2ms
21 days ago
Seven Segment
GolfingSuccess
164
3ms
21 days ago
DFA Simulator
CaedenHarper
218
4ms
21 days ago
Minesweeper
CaedenHarper
🥉
158
18ms
21 days ago
Poker
Steffan153
🥈
312
4ms
21 days ago
Factorial Factorisation
CaedenHarper
🥈
121
7ms
22 days ago
Card Number Validation
CaedenHarper
125
3ms
22 days ago
Poker
CaedenHarper
399
4ms
22 days ago
SI Units
CaedenHarper
524
22ms
22 days ago
SI Units
edsrzf
🥈
504
709ms
22 days ago
Cubes
Steffan153
💎
166
3ms
22 days ago
Leyland Numbers
CaedenHarper
🥉
98
5ms
22 days ago
Ascending Primes
CaedenHarper
💎
93
2,158ms
22 days ago
Jacobi Symbol
CaedenHarper
🥈
202
3ms
23 days ago
Repeating Decimals
CaedenHarper
🥉
241
4ms
23 days ago
Star Wars Opening Crawl
CaedenHarper
🥈
414
7ms
23 days ago
Continued Fractions
CaedenHarper
🥉
198
3ms
23 days ago
Lucky Numbers
CaedenHarper
99
57ms
23 days ago
Christmas Trees
CaedenHarper
75
2ms
23 days ago
Inventory Sequence
CaedenHarper
83
3ms
23 days ago
Recamán
albanian-laundromat
72
3ms
23 days ago
𝑒
albanian-laundromat
95
77ms
23 days ago
Catalan’s Constant
CaedenHarper
🥉
194
405ms
23 days ago
Polyominoes
CaedenHarper
🥉
234
31ms
23 days ago
Ten-pin Bowling
CaedenHarper
249
3ms
23 days ago
Mahjong
MeWhenI
🥉
330
17ms
24 days ago
Zodiac Signs
CaedenHarper
249
3ms
26 days ago
Intersection
CaedenHarper
188
4ms
26 days ago
Odious Numbers (Long)
CaedenHarper
51
2ms
26 days ago
Evil Numbers (Long)
CaedenHarper
52
2ms
26 days ago
Gray Code Decoder
CaedenHarper
🥇
94
6ms
26 days ago
Pangram Grep
CaedenHarper
121
3ms
26 days ago
Fractions
CaedenHarper
155
4ms
26 days ago
Happy Numbers (Long)
CaedenHarper
98
12ms
26 days ago
Ordinal Numbers
CaedenHarper
126
3ms
26 days ago
Diamonds
CaedenHarper
119
2ms
26 days ago
Musical Chords
CaedenHarper
193
4ms
26 days ago
Forsyth–Edwards Notation
albanian-laundromat
🥉
171
3ms
27 days ago
Sudoku (Fill-in)
CaedenHarper
🥈
298
9ms
27 days ago
Connect Four
kmathis22
423
35ms
27 days ago
Arabic to Roman
CaedenHarper
188
10ms
27 days ago
Time Distance
CaedenHarper
302
5ms
1 Jun 2026
Game of Life
CaedenHarper
154
5ms
1 Jun 2026
Rule 110
CaedenHarper
119
6ms
1 Jun 2026
Billiards
CaedenHarper
249
3ms
1 Jun 2026
Smith Numbers
CaedenHarper
🥉
155
1,706ms
1 Jun 2026
Mandelbrot
CaedenHarper
136
1,549ms
1 Jun 2026
Collatz
CaedenHarper
🥇
67
38ms
1 Jun 2026
φ
CaedenHarper
150
342ms
1 Jun 2026
Trinomial Triangle
CaedenHarper
🥉
107
3ms
1 Jun 2026
Kolakoski Constant
CaedenHarper
🥉
149
728ms
1 Jun 2026
ln 2
CaedenHarper
🥉
146
886ms
1 Jun 2026
Connect Four
CaedenHarper
🥉
271
106ms
1 Jun 2026
Connect Four
edsrzf
🥈
239
72ms
1 Jun 2026
Connect Four
MeWhenI
274
82ms
1 Jun 2026
Proximity Grid
CaedenHarper
🥉
240
20ms
31 May 2026
ln 2
retrohun
1,018
3ms
31 May 2026