Collatz in C in chars. Achievements Cheevos Holes Languages Medals Miscellaneous 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 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 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 NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel 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 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel 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 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 NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 68th mnbvczx 🇰🇷 821 78 2ms 12 Mar 2023 68th annaproxy 821 78 2ms 4 Jun 2023 68th snoozingnewt 🇺🇸 821 78 3ms 23 Sep 2023 68th weliveinhell 🇭🇹 821 78 2ms 2 Oct 2023 68th ehulinsky 🇺🇸 821 78 3ms 16 Feb 2024 68th Luca2812 821 78 4ms 4 Mar 2024 68th 0xV0RT3X 821 78 3ms 4 Mar 2024 68th emgordon154 821 78 2ms 25 Jul 2024 68th BlankSpruce 821 78 2ms 20 Aug 2024 68th madeforlosers 821 78 2ms 5 Sep 2024 68th rniii 821 78 2ms 24 Sep 2024 68th FragmentedCurve 821 78 17ms 3 Oct 2024 68th FortuiteMan 🇫🇷 821 78 2ms 10 Oct 2024 68th LvLError 821 78 2ms 29 May 2025 68th Lv0Sys 🇵🇱 821 78 2ms 30 May 2025 91st c0d3-4-F00d 🇩🇪 810 79 3ms 5 May 2022 91st jgbaldwinbrown 810 79 5ms 16 Jun 2022 91st jupj 🇫🇮 810 79 2ms 12 Aug 2022 91st tkr-sh 🇰🇵 810 79 2ms 20 Aug 2022 91st djeedjay 🇳🇱 810 79 2ms 15 Sep 2022 91st ValentinCassayre 810 79 2ms 8 Oct 2022 91st namcartoon06 810 79 2ms 30 Jun 2023 91st Us1ngTh3Hub 810 79 3ms 8 Jul 2023 91st Widgitty 810 79 3ms 30 Aug 2023 91st Grrisly 810 79 3ms 10 Nov 2023 91st trist224 🇫🇷 810 79 2ms 14 Feb 2024 91st mathisfun271 810 79 3ms 19 Feb 2024 91st retrohun 810 79 3ms 29 Mar 2024 91st HumanoidCPU 810 79 2ms 6 May 2024 91st funnyboy-roks 810 79 2ms 14 Jun 2024 91st bac0id 810 79 2ms 29 Jun 2024 91st csharpython 810 79 3ms 5 Aug 2025 91st iczelia 🇩🇪 810 79 3ms 16 Oct 2025 91st luuumine 🇫🇷 810 79 2ms 28 Oct 2025 110th Seek64 🇩🇪 800 80 3ms 11 Nov 2022 110th tvcv901 800 80 3ms 22 Mar 2023 110th kyleclaassen 800 80 2ms 20 May 2023 110th logvp 800 80 3ms 1 Feb 2024 110th ei14 800 80 2ms 9 May 2024 110th elttil 800 80 2ms 8 Jun 2024 110th gastropner 800 80 2ms 14 Jul 2025 117th MinorLegato 🇸🇪 790 81 2ms 9 May 2022 117th slerpyyy 🇩🇪 790 81 2ms 21 Oct 2022 117th violeta-desantis 790 81 2ms 22 Sep 2023 117th SebastianoTaddei 790 81 3ms 4 Oct 2024 121st Ripick 780 82 3ms 10 Nov 2022 121st pandapawskat 780 82 3ms 13 Jan 2023 121st annoj 780 82 2ms 18 Jan 2023 121st CatsAreFluffy 780 82 2ms 18 Feb 2023 121st nyoshe 780 82 3ms 9 Dec 2023 121st NickTheEASDude 🇺🇸 780 82 3ms 26 Jan 2024 121st LHLaurini 🇧🇷 780 82 3ms 26 Jun 2024 121st lgrandco 780 82 2ms 9 Oct 2024 121st Maashau 780 82 2ms 3 days ago 130th Anonymousellama21 771 83 3ms 15 Jun 2022 130th cmayer777 771 83 2ms 15 Oct 2022 130th nstearns96 🇬🇧 771 83 2ms 16 Nov 2022 130th osmith93 771 83 2ms 13 Dec 2022 130th mhgockel 771 83 3ms 15 Apr 2023 130th funnsam 🇭🇰 771 83 2ms 25 Jul 2023 130th mousetail 🇳🇱 771 83 2ms 10 May 2024 130th solisolu 771 83 2ms 6 hours ago 138th guilhem-roy 🇫🇷 762 84 5ms 5 May 2022 138th resetcentral 762 84 2ms 22 May 2022 138th Adrien-AM 762 84 3ms 12 Sep 2022 138th ibrahimhanifceker 762 84 2ms 9 Aug 2024 138th James-Oswald 🇺🇸 762 84 2ms 23 Aug 2024 138th h-hh-hhh 🇺🇦 762 84 5ms 6 Nov 2024 144th ms-tingliang 753 85 3ms 5 Aug 2022 144th aubergine-sauce 753 85 2ms 26 May 2023 144th kallmi28 🇨🇿 753 85 2ms 13 Nov 2023 144th azka1368 753 85 2ms 23 Nov 2023 144th iilegacyyii 753 85 3ms 22 Jan 2024 144th f-tucker 753 85 3ms 6 Feb 2024 144th Stockoh 🇫🇷 753 85 2ms 29 Sep 2024 First Prev 76–150 of 237 Next Last