Collatz in C in chars. 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 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 Snake Sphenic Numbers Trinomial Triangle 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 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 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 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 Snake Sphenic Numbers Trinomial Triangle Turtle Tutorial # Golfer Points Chars Time 65th weliveinhell 🇭🇹 821 78 2 Oct 2023 65th ehulinsky 🇺🇸 821 78 16 Feb 2024 65th Luca2812 821 78 4 Mar 2024 65th 0xV0RT3X 821 78 4 Mar 2024 65th emgordon154 821 78 25 Jul 2024 65th BlankSpruce 821 78 20 Aug 2024 65th madeforlosers 821 78 5 Sep 2024 65th rniii 821 78 24 Sep 2024 65th FragmentedCurve 821 78 3 Oct 2024 65th FortuiteMan 🇫🇷 821 78 10 Oct 2024 65th LvLError 821 78 29 May 2025 65th Lv0Sys 🇵🇱 821 78 30 May 2025 88th c0d3-4-F00d 🇩🇪 810 79 5 May 2022 88th jgbaldwinbrown 810 79 16 Jun 2022 88th jupj 🇫🇮 810 79 12 Aug 2022 88th tkr-sh 🇫🇷 810 79 20 Aug 2022 88th djeedjay 🇳🇱 810 79 15 Sep 2022 88th ValentinCassayre 810 79 8 Oct 2022 88th namcartoon06 810 79 30 Jun 2023 88th Us1ngTh3Hub 810 79 8 Jul 2023 88th Widgitty 810 79 30 Aug 2023 88th Grrisly 810 79 10 Nov 2023 88th trist224 🇫🇷 810 79 14 Feb 2024 88th mathisfun271 810 79 19 Feb 2024 88th retrohun 810 79 29 Mar 2024 88th HumanoidCPU 810 79 6 May 2024 88th funnyboy-roks 810 79 14 Jun 2024 88th bac0id 810 79 29 Jun 2024 88th csharpython 810 79 5 Aug 2025 105th Seek64 🇩🇪 800 80 11 Nov 2022 105th tvcv901 800 80 22 Mar 2023 105th kyleclaassen 800 80 20 May 2023 105th logvp 800 80 1 Feb 2024 105th ei14 800 80 9 May 2024 105th elttil 800 80 8 Jun 2024 105th CaedenHarper 🇨🇦 800 80 26 Jan 2025 105th gastropner 800 80 14 Jul 2025 113th MinorLegato 🇸🇪 790 81 9 May 2022 113th slerpyyy 🇩🇪 790 81 21 Oct 2022 113th violeta-desantis 790 81 22 Sep 2023 113th SebastianoTaddei 790 81 4 Oct 2024 117th Ripick 780 82 10 Nov 2022 117th pandapawskat 780 82 13 Jan 2023 117th annoj 780 82 18 Jan 2023 117th CatsAreFluffy 780 82 18 Feb 2023 117th nyoshe 780 82 9 Dec 2023 117th NickTheEASDude 🇺🇸 780 82 26 Jan 2024 117th LHLaurini 🇧🇷 780 82 26 Jun 2024 117th lgrandco 780 82 9 Oct 2024 125th Anonymousellama21 771 83 15 Jun 2022 125th cmayer777 771 83 15 Oct 2022 125th nstearns96 🇬🇧 771 83 16 Nov 2022 125th osmith93 771 83 13 Dec 2022 125th mhgockel 771 83 15 Apr 2023 125th funnsam 🇭🇰 771 83 25 Jul 2023 125th mousetail 🇳🇱 771 83 10 May 2024 132nd guilhem-roy 🇫🇷 762 84 5 May 2022 132nd resetcentral 762 84 22 May 2022 132nd Adrien-AM 762 84 12 Sep 2022 132nd ibrahimhanifceker 762 84 9 Aug 2024 132nd James-Oswald 🇺🇸 762 84 23 Aug 2024 132nd h-hh-hhh 🇺🇦 762 84 6 Nov 2024 138th ms-tingliang 753 85 5 Aug 2022 138th aubergine-sauce 753 85 26 May 2023 138th kallmi28 🇨🇿 753 85 13 Nov 2023 138th azka1368 753 85 23 Nov 2023 138th iilegacyyii 753 85 22 Jan 2024 138th f-tucker 753 85 6 Feb 2024 138th Stockoh 🇫🇷 753 85 29 Sep 2024 145th garrisonhh 744 86 22 Oct 2022 145th tpasfieldERAU 744 86 5 Nov 2022 145th isaiah0311 744 86 16 Feb 2023 145th piano-miles 744 86 30 Mar 2023 149th razetime 736 87 22 Aug 2022 150th james-downey 727 88 9 Jul 2022 Prev 76–150 of 225 Next