Collatz in C in bytes. Cheevos Holes Recent Holes Langs Medals Misc 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 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 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 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 Calendar Connect Four CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Erlang Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Erlang Fennel Harbour Hare Haxe Hush Hy iogii Knight 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 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 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 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 Calendar Connect Four CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 64th weliveinhell 🇭🇹 833 78 2ms 2 Oct 2023 64th ehulinsky 🇺🇸 833 78 3ms 16 Feb 2024 64th Luca2812 833 78 4ms 4 Mar 2024 64th 0xV0RT3X 833 78 3ms 4 Mar 2024 64th dokutan 833 78 3ms 17 Mar 2024 64th emgordon154 833 78 2ms 25 Jul 2024 64th BlankSpruce 833 78 2ms 20 Aug 2024 64th madeforlosers 833 78 2ms 5 Sep 2024 64th rniii 833 78 2ms 24 Sep 2024 64th FragmentedCurve 833 78 17ms 3 Oct 2024 64th FortuiteMan 🇫🇷 833 78 2ms 10 Oct 2024 64th Iznoanygod 🇺🇸 833 78 3ms 19 Dec 2024 64th LvLError 833 78 2ms 29 May 2025 64th Lv0Sys 🇵🇱 833 78 2ms 30 May 2025 90th c0d3-4-F00d 🇩🇪 823 79 3ms 5 May 2022 90th jgbaldwinbrown 823 79 5ms 16 Jun 2022 90th jupj 🇫🇮 823 79 2ms 12 Aug 2022 90th tkr-sh 🇫🇷 823 79 2ms 20 Aug 2022 90th djeedjay 🇳🇱 823 79 2ms 15 Sep 2022 90th ValentinCassayre 823 79 2ms 8 Oct 2022 90th namcartoon06 823 79 2ms 30 Jun 2023 90th Us1ngTh3Hub 823 79 3ms 8 Jul 2023 90th Widgitty 823 79 3ms 30 Aug 2023 90th Grrisly 823 79 3ms 10 Nov 2023 90th trist224 🇫🇷 823 79 2ms 14 Feb 2024 90th mathisfun271 823 79 3ms 19 Feb 2024 90th retrohun 823 79 3ms 29 Mar 2024 90th HumanoidCPU 823 79 2ms 6 May 2024 90th funnyboy-roks 823 79 2ms 14 Jun 2024 90th csharpython 823 79 3ms 5 Aug 2025 90th iczelia 🇩🇪 823 79 3ms 6 days ago 107th Seek64 🇩🇪 813 80 3ms 11 Nov 2022 107th tvcv901 813 80 3ms 22 Mar 2023 107th kyleclaassen 813 80 2ms 20 May 2023 107th logvp 813 80 3ms 1 Feb 2024 107th ei14 813 80 2ms 9 May 2024 107th elttil 813 80 3ms 8 Jun 2024 107th bac0id 813 80 3ms 29 Jun 2024 107th gastropner 813 80 2ms 14 Jul 2025 115th MinorLegato 🇸🇪 802 81 2ms 9 May 2022 115th slerpyyy 🇩🇪 802 81 2ms 21 Oct 2022 115th violeta-desantis 802 81 2ms 22 Sep 2023 115th SebastianoTaddei 802 81 3ms 4 Oct 2024 119th Ripick 793 82 3ms 10 Nov 2022 119th pandapawskat 793 82 3ms 13 Jan 2023 119th annoj 793 82 2ms 18 Jan 2023 119th CatsAreFluffy 793 82 2ms 18 Feb 2023 119th nyoshe 793 82 3ms 9 Dec 2023 119th NickTheEASDude 🇺🇸 793 82 3ms 26 Jan 2024 119th LHLaurini 🇧🇷 793 82 3ms 26 Jun 2024 119th lgrandco 793 82 2ms 9 Oct 2024 127th Anonymousellama21 783 83 3ms 15 Jun 2022 127th cmayer777 783 83 2ms 15 Oct 2022 127th nstearns96 🇬🇧 783 83 2ms 16 Nov 2022 127th osmith93 783 83 2ms 13 Dec 2022 127th mhgockel 783 83 3ms 15 Apr 2023 127th funnsam 🇭🇰 783 83 2ms 25 Jul 2023 127th mousetail 🇳🇱 783 83 2ms 10 May 2024 134th guilhem-roy 🇫🇷 774 84 5ms 5 May 2022 134th resetcentral 774 84 2ms 22 May 2022 134th Adrien-AM 774 84 3ms 12 Sep 2022 134th ibrahimhanifceker 774 84 2ms 9 Aug 2024 134th James-Oswald 🇺🇸 774 84 2ms 23 Aug 2024 134th h-hh-hhh 🇺🇦 774 84 5ms 6 Nov 2024 140th ms-tingliang 765 85 3ms 5 Aug 2022 140th aubergine-sauce 765 85 2ms 26 May 2023 140th kallmi28 🇨🇿 765 85 2ms 13 Nov 2023 140th azka1368 765 85 2ms 23 Nov 2023 140th iilegacyyii 765 85 3ms 22 Jan 2024 140th f-tucker 765 85 3ms 6 Feb 2024 140th Stockoh 🇫🇷 765 85 2ms 29 Sep 2024 147th garrisonhh 756 86 3ms 22 Oct 2022 147th tpasfieldERAU 756 86 3ms 5 Nov 2022 147th isaiah0311 756 86 3ms 16 Feb 2023 147th piano-miles 756 86 3ms 30 Mar 2023 First Prev 76–150 of 227 Next Last