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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
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
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
Calendar
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
Multitap Input
NFA Simulator
Numbrix
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Semiprime Numbers
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Tutorial
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Chars
Time
Submitted
Catalan Numbers
Lv0Sys
43
280ms
24 days ago
Catalan Numbers
snoozingnewt
41
553ms
3 Dec 2025
Catalan Numbers
KatieLG
2,646
175ms
30 Nov 2025
Catalan Numbers
Daniel-Ellison
43
323ms
10 Aug 2025
Catalan Numbers
Ripick
45
276ms
27 Jun 2025
Catalan Numbers
sean-niemann
🥇
39
272ms
12 Mar 2025
Catalan Numbers
CaedenHarper
2,880
170ms
31 Jan 2025
Catalan Numbers
Mabeloid
2,880
174ms
17 Sep 2024
Catalan Numbers
rollershutter
56
224ms
8 Jun 2024
Catalan Numbers
dokutan
45
254ms
19 May 2024
Catalan Numbers
sidok
82
214ms
5 May 2024
Catalan Numbers
BREMAUCY
41
434ms
22 Apr 2024
Catalan Numbers
HumanoidCPU
2,880
140ms
17 Apr 2024
Catalan Numbers
Yewzir
41
314ms
14 Feb 2024
Catalan Numbers
msbranicky
60
199ms
15 Jan 2024
Catalan Numbers
DialFrost
🥇
39
215ms
2 Jan 2024
Catalan Numbers
stellartux
47
289ms
1 Jan 2024
Catalan Numbers
Codsilla
43
546ms
3 Nov 2023
Catalan Numbers
p-zubieta
🥇
39
484ms
25 Sep 2023
Catalan Numbers
bciccarelli
63
317ms
10 Sep 2023
Catalan Numbers
davbass
51
297ms
22 Aug 2023
Catalan Numbers
latvianfarmer17
67
274ms
20 Jul 2023
Catalan Numbers
alemelis
41
306ms
12 Apr 2023
Catalan Numbers
ovs-code
🥇
39
207ms
11 Apr 2023
Catalan Numbers
tidalDisruptionEvent
41
353ms
20 Mar 2023
Catalan Numbers
sisyphus-ppcg
🥇
39
213ms
20 Mar 2023
Catalan Numbers
shellbertt
52
293ms
19 Mar 2023
Catalan Numbers
Steffan153
🥇
39
240ms
19 Mar 2023
Catalan Numbers
Shanethegamer
41
476ms
20 Feb 2023
Catalan Numbers
MeWhenI
48
378ms
15 Feb 2023
Catalan Numbers
retrohun
2,880
164ms
27 Dec 2022
Catalan Numbers
HopelessSoap
62
236ms
20 Oct 2022
Catalan Numbers
antimon2
🥇
39
494ms
5 Sep 2022
Catalan Numbers
KatieLG-Transpiler
3,026
178ms
23 Jun 2022
Catalan Numbers
czylabsonasa
46
306ms
14 Jun 2022
Catalan Numbers
rokasveitas
52
321ms
16 May 2022
Catalan Numbers
j-Ewan
46
429ms
11 Feb 2022
Catalan Numbers
MarcMush
42
333ms
9 Feb 2022
Catalan Numbers
HPWiz
🥇
39
201ms
30 Jan 2022
Catalan Numbers
janbehrens
42
341ms
29 Jan 2022
Catalan Numbers
primo-ppcg
41
381ms
29 Jan 2022
Catalan Numbers
JayXon
🥇
39
234ms
29 Jan 2022
Catalan Numbers
Lydxn
🥇
39
213ms
29 Jan 2022
Catalan Numbers
JRaspass
2,883
165ms
29 Jan 2022