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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
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
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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
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Snake
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Tutorial
Hole
Golfer
Chars
Time
Submitted
Collatz
JohnSwiftC
111
126ms
9 days ago
Collatz
Lv0Sys
102
126ms
7 Dec 2025
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KatieLG
2,188
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ian-h-chamberlain
92
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104
111ms
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101
124ms
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102
123ms
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kumavale
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110
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105
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3,246
109ms
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Collatz
addmai
118
125ms
25 Jul 2025
Collatz
ndren
104
119ms
14 Jul 2025
Collatz
henrydukepickle
97
122ms
8 Jul 2025
Collatz
unfinishedprogram
102
121ms
27 Jun 2025
Collatz
acotis
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88
118ms
9 Jun 2025
Collatz
sean-niemann
92
125ms
8 Jun 2025
Collatz
LvLError
108
127ms
29 May 2025
Collatz
CosmicRaichu
110
123ms
25 Apr 2025
Collatz
DialFrost
91
130ms
7 Apr 2025
Collatz
TannerJ07
109
119ms
4 Apr 2025
Collatz
komunre
194
126ms
15 Mar 2025
Collatz
lolgeny
93
121ms
22 Feb 2025
Collatz
emgordon154
98
119ms
18 Feb 2025
Collatz
ComputerKWasTaken
110
126ms
20 Jan 2025
Collatz
nullie
93
125ms
19 Dec 2024
Collatz
edsrzf
91
123ms
29 Nov 2024
Collatz
avila-gabriel
116
130ms
17 Oct 2024
Collatz
FortuiteMan
108
127ms
10 Oct 2024
Collatz
dokutan
100
124ms
3 Oct 2024
Collatz
madeforlosers
108
130ms
5 Sep 2024
Collatz
asterized
110
116ms
24 Aug 2024
Collatz
trist224
93
121ms
12 Aug 2024
Collatz
smartiel
93
127ms
12 Aug 2024
Collatz
Florian-Mt
110
132ms
22 Jul 2024
Collatz
madex
108
119ms
9 Jul 2024
Collatz
wuzekai518
106
122ms
8 Jul 2024
Collatz
lynn
91
130ms
6 Jul 2024
Collatz
inverseLorentz
92
124ms
27 May 2024
Collatz
HumanoidCPU
101
116ms
7 May 2024
Collatz
rucin93
105
121ms
2 May 2024
Collatz
gurglemurgle5
125
117ms
26 Apr 2024
Collatz
Alex-Huggett
109
119ms
14 Apr 2024
Collatz
77Tigers
104
121ms
9 Apr 2024
Collatz
TylerBloom
96
120ms
22 Mar 2024
Collatz
siltyy
103
119ms
20 Mar 2024
Collatz
elgan65536
93
115ms
5 Mar 2024
Collatz
TheMadRey
118
126ms
5 Mar 2024
Collatz
CarsonChr
119
119ms
14 Jan 2024
Collatz
mousetail
94
130ms
12 Jan 2024
Collatz
okaponta
102
118ms
11 Jan 2024
Collatz
logvp
93
121ms
2 Jan 2024
Collatz
drabart
112
117ms
15 Dec 2023
Collatz
stefangimmillaro
92
122ms
24 Oct 2023
Collatz
funnsam
130
124ms
23 Oct 2023
Collatz
lambda-abstraction
112
120ms
21 Oct 2023
Collatz
msbranicky
100
127ms
5 Oct 2023
Collatz
snoozingnewt
108
121ms
23 Sep 2023
Collatz
craftablescience
128
114ms
19 Sep 2023
Collatz
yamhab
103
124ms
14 Sep 2023
Collatz
StronkCheese
104
123ms
7 Sep 2023
Collatz
Heathcorp
108
117ms
25 Aug 2023
Collatz
WatMan77
146
173ms
16 Aug 2023
Collatz
GoodDays13
133
130ms
12 Jul 2023
Collatz
AlexanderFair
103
117ms
5 Jul 2023
Collatz
undersquire
104
125ms
21 Jun 2023
Collatz
ovs-code
94
125ms
21 Jun 2023
Collatz
bogdan-cu
151
118ms
31 May 2023
Collatz
MeWhenI
101
117ms
29 May 2023
Collatz
StHagel
105
121ms
25 May 2023
Collatz
klixel
91
121ms
20 May 2023
Collatz
sona-tau
155
116ms
13 Apr 2023
Collatz
Z-snails
104
127ms
27 Feb 2023
Collatz
r-brinke
101
127ms
24 Feb 2023
Collatz
Betuaredead
110
120ms
5 Jan 2023
Collatz
retrohun
3,246
104ms
27 Dec 2022
Collatz
aDwarfNamedUrist
112
122ms
13 Dec 2022
Collatz
snobee
93
126ms
8 Dec 2022
Collatz
Super-Pizza
91
127ms
4 Dec 2022
Collatz
Starwort
102
119ms
11 Nov 2022