ISBN in C in bytes. 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 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 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 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 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 ArkScript 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 ArkScript 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 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 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 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 Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 1st rhdqor213 1,000 98 2ms 15 hours ago 2nd KasperKivimaeki 🇫🇮 980 100 1ms 19 Jul 2024 3rd JayXon 🇺🇸 970 101 2ms 21 May 2023 3rd nwellnhof 🇩🇪 970 101 1ms 23 Jun 2023 5th JohandeRuiter 🇳🇱 961 102 1ms 7 Jul 2024 6th ovs-code 🇩🇪 933 105 1ms 17 Feb 2024 7th inventshah 925 106 2ms 7 Aug 2024 8th Alex-x90 🇺🇸 907 108 2ms 8 Aug 2023 9th prplz 🇦🇺 899 109 1ms 18 Jan 2022 9th xsot 🇸🇬 899 109 2ms 1 Feb 2024 11th Irratix 🇳🇱 891 110 2ms 14 May 2022 11th speles 🇺🇦 891 110 2ms 29 Oct 2023 13th ZakkkkAttackkkk 🇵🇭 883 111 2ms 9 Nov 2023 13th Szum123321 🇵🇱 883 111 2ms 9 Dec 2023 13th DialFrost 🇸🇬 883 111 1ms 20 Dec 2024 16th Shanethegamer 🇺🇸 875 112 2ms 20 Apr 2022 17th Yewzir 🇧🇪 867 113 2ms 29 Nov 2023 17th drabart 🇵🇱 867 113 2ms 18 Dec 2023 19th Mandrzejy 🇵🇱 860 114 2ms 13 Sep 2024 19th AZTECCO 860 114 2ms 16 Sep 2025 21st madex 🇩🇪 852 115 2ms 10 Apr 2022 21st FragmentedCurve 852 115 2ms 22 Nov 2023 21st mathisfun271 852 115 2ms 5 Feb 2024 24th MeWhenI 🇻🇦 845 116 2ms 5 Jul 2024 25th m-tkach 🇺🇦 838 117 2ms 11 Jan 2022 25th prestosilver 🇺🇸 838 117 2ms 21 days ago 27th sean-niemann 🇺🇸 831 118 2ms 3 Feb 2024 28th LHLaurini 🇧🇷 824 119 1ms 17 Jul 2024 28th solisolu 824 119 2ms 25 Nov 2025 30th retrohun 810 121 2ms 30 Dec 2022 30th abc7-12 810 121 1ms 26 Jun 2024 32nd c0d3-4-F00d 🇩🇪 803 122 2ms 21 Feb 2022 33rd iczelia 🇩🇪 797 123 1ms 24 Sep 2025 34th djeedjay 🇳🇱 790 124 2ms 16 Sep 2022 35th jupj 🇫🇮 784 125 2ms 31 Aug 2022 36th bac0id 778 126 2ms 3 Jul 2024 37th jared-hughes 766 128 2ms 17 Mar 2022 38th janbehrens 🇩🇪 754 130 5ms 23 Jun 2023 38th dokutan 754 130 1ms 8 Nov 2025 40th pandapawskat 742 132 2ms 7 Feb 2022 41st jgbaldwinbrown 737 133 2ms 13 Oct 2022 41st klixel 🇨🇦 737 133 2ms 27 Nov 2023 43rd HumanoidCPU 721 136 1ms 4 Mar 2025 44th violeta-desantis 715 137 2ms 27 Sep 2023 45th heanyang1 700 140 2ms 21 May 2025 46th Anonymousellama21 695 141 2ms 14 Apr 2022 47th akamayu-ouo 🇹🇼 690 142 1ms 8 Jul 2024 48th Re-Adventures 🇮🇳 685 143 2ms 7 Feb 2022 48th DrPiranoid 685 143 2ms 21 Oct 2022 50th sjrct 681 144 2ms 4 Aug 2024 51st biocommando 🇫🇮 676 145 2ms 26 Dec 2022 51st kallmi28 🇨🇿 676 145 2ms 13 Oct 2023 51st rifatx 676 145 1ms 14 Jul 2024 54th MaxElf999 662 148 2ms 19 Dec 2022 55th gastropner 658 149 2ms 8 Jul 2025 56th second-pumpkin 653 150 2ms 15 Mar 2023 56th msbranicky 653 150 2ms 20 Aug 2023 58th Andriamanitra 🇫🇮 641 153 2ms 14 Jul 2023 59th jbjd 636 154 2ms 12 Sep 2024 60th tomh1012 632 155 2ms 21 Nov 2025 61st daschr 616 159 2ms 26 Jun 2023 62nd isaiah0311 605 162 2ms 16 Feb 2023 63rd vhoulbreque 🇫🇷 580 169 2ms 26 Nov 2025 64th 1231234md5 🇨🇳 566 173 1ms 11 Dec 2023 65th rambox11 536 183 2ms 11 Jun 2024 66th ColeBardin 530 185 4ms 21 Jul 2022 66th snoozingnewt 🇨🇦 530 185 2ms 14 Nov 2023 68th Sephirem98 516 190 2ms 2 Nov 2023 69th Sascha37 🇩🇪 476 206 2ms 8 Oct 2025 70th jacobly0 🇺🇸 456 215 2ms 5 Sep 2023 70th epic-programmer-guy 456 215 2ms 31 Dec 2023 72nd MateuszPietrzak 🇵🇱 436 225 2ms 22 Nov 2023 73rd Schmitt-Very-Cool 415 236 2ms 25 May 2025 74th zt14427 364 269 2ms 6 Oct 2023 75th mrmena 🇦🇺 351 279 3ms 14 Mar 2024 76th Natanaelel 🇸🇪 343 286 2ms 7 Feb 2023 77th kevinnaviapaiva 282 347 2ms 24 Feb 2025 78th aksyristos 182 538 2ms 11 Jun 2023 79th Msleizak 🇫🇷 126 776 2ms 9 Nov 2023 1–79 of 79