The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 6 days. Why not try and solve them ahead of time?
Ordinal Numbers in Python 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 Continued Fractions 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 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four 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 Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript 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 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> ALGOL 68 ArkScript 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 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily 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 Continued Fractions 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 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four 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 Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 319th dgambit 672 119 12ms 7 Apr 2021 319th eshilo-draper 672 119 19ms 14 Nov 2022 319th Ythaenagor 672 119 19ms 5 Aug 2024 319th 123mjb 672 119 21ms 17 Nov 2025 319th artemetra 672 119 19ms 27 days ago 326th luftj 667 120 12ms 19 Jan 2021 326th dillon-duncando 667 120 19ms 3 Oct 2022 326th FCORMERAIS 667 120 13ms 7 Mar 2024 326th RaBa21 🇭🇺 667 120 20ms 18 Jul 2025 326th qpwoeirut 667 120 14ms 12 Aug 2025 331st dzshn 661 121 13ms 5 Sep 2021 331st goGuru 661 121 18ms 19 Dec 2022 331st mohammad-sayed-ahmad 661 121 12ms 21 Jul 2024 331st HumanoidCPU 661 121 13ms 18 Feb 2025 331st denisfouchard 661 121 12ms 22 Aug 2025 336th Pena86 656 122 20ms 28 Feb 2021 336th hymanimy 656 122 18ms 24 Aug 2021 336th Jaydosu 656 122 12ms 10 May 2022 336th CatsAreFluffy 656 122 20ms 18 Feb 2023 336th GitQuick 656 122 11ms 9 Mar 2024 341st msrawson 650 123 13ms 13 May 2020 341st Bodo171 650 123 19ms 24 Nov 2022 341st j3mak 650 123 12ms 19 Jan 2024 341st davidludwik2370 650 123 13ms 17 days ago 341st zgialor-lab 650 123 19ms 15 days ago 346th suchwise 645 124 13ms 29 Oct 2019 346th Omega65536 🇩🇪 645 124 12ms 10 Jan 2021 346th matricronia 645 124 19ms 6 May 2021 346th MaxElf999 645 124 12ms 24 May 2022 350th zuparnowa 640 125 13ms 12 Jul 2019 350th henrytranter 640 125 12ms 20 Sep 2019 350th FlorianCassayre 🇫🇷 640 125 13ms 2 Mar 2023 350th 2011-Chan-Ethan 640 125 13ms 12 Jul 2023 350th brimstonetrader 640 125 13ms 8 Jan 2024 350th sciencejiho 640 125 20ms 18 Oct 2024 356th michelebastione 🇮🇹 635 126 19ms 10 Feb 2020 356th evanrittner 635 126 18ms 5 Jun 2021 356th Bananapants22 635 126 13ms 4 Aug 2022 356th eddvrs 635 126 20ms 20 Aug 2022 356th ComputerKWasTaken 🇺🇸 635 126 12ms 21 Jan 2025 361st Florian-Mt 630 127 12ms 5 Oct 2023 361st NoneTheFewer 630 127 13ms 27 Dec 2025 363rd Natanaelel 🇸🇪 625 128 20ms 8 Oct 2021 363rd atazzam 🇺🇸 625 128 13ms 4 Apr 2022 363rd Yareeeema 625 128 13ms 9 Jan 2023 366th ethandhunt 620 129 19ms 15 Aug 2021 366th WinterWolfSV 620 129 19ms 27 days ago 368th mrmena 🇦🇺 615 130 13ms 12 Jun 2021 368th twocatsinatrenchcoat 615 130 12ms 29 Mar 2022 368th badboj40 615 130 14ms 26 Dec 2022 371st dahrens 611 131 12ms 11 Jul 2019 371st P-Quentin 🇫🇷 611 131 13ms 3 Aug 2022 371st tobeannouncd 611 131 12ms 3 Jan 2024 371st Jd5221 611 131 19ms 14 Feb 2024 375th brochmann 🇸🇪 606 132 13ms 10 Feb 2022 375th alexjurkiewicz 🇦🇺 606 132 19ms 19 Jul 2022 375th DrPrettyman 606 132 19ms 6 Jun 2023 375th aalec 606 132 20ms 24 Apr 2024 379th MLPdiscord 602 133 21ms 10 Jan 2022 380th jameswmccarty 597 134 20ms 23 Feb 2025 381st wobblybits 593 135 16ms 20 Aug 2025 382nd kyleclaassen 584 137 13ms 9 Feb 2022 382nd nmgetahun 584 137 12ms 27 Jan 2023 384th boxjelly 580 138 13ms 10 Feb 2021 384th mathisfun271 580 138 12ms 26 Oct 2021 384th mdnestor 580 138 12ms 23 Dec 2022 384th Techdude01 580 138 21ms 19 Feb 2023 384th cingulataluke 580 138 13ms 30 Aug 2023 389th Alex-Huggett 🇬🇧 576 139 19ms 22 Oct 2024 389th robin-scragg 576 139 18ms 24 Jun 2025 391st jackkav 571 140 19ms 24 Oct 2019 391st trist224 🇫🇷 571 140 21ms 18 Oct 2022 391st jhu04 571 140 19ms 26 Apr 2023 391st AbhilashaTandon 571 140 20ms 24 Sep 2023 391st ehulinsky 🇺🇸 571 140 13ms 29 Mar 2025 396th estomagordo 🇳🇱 567 141 13ms 7 Aug 2019 397th logvp 563 142 18ms 7 Jan 2024 398th adesanjo 559 143 19ms 24 Oct 2019 398th TheAristos 559 143 19ms 1 Nov 2019 398th chris-robo 559 143 12ms 8 Apr 2020 First Prev 321–400 of 473 Next Last
