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 398th yuchuehw 559 143 18ms 12 Jan 2024 398th qwjhvbxi 559 143 14ms 7 Feb 2024 403rd slopey112 552 145 13ms 27 Nov 2019 403rd wrhm 552 145 13ms 12 Dec 2020 403rd CodeAltF4 552 145 20ms 3 Mar 2022 403rd jusaka 552 145 12ms 6 days ago 407th kenny14231 548 146 12ms 6 Aug 2022 407th cthierfelder 🇲🇨 548 146 12ms 9 Sep 2025 409th tayacrystals 544 147 13ms 18 Nov 2023 410th rowboat1 541 148 19ms 17 Sep 2019 410th GeorgePerreault 541 148 12ms 5 Jun 2020 412th CheeseCake628 🇳🇴 537 149 19ms 19 Mar 2023 412th SURAJMITTAL 537 149 13ms 19 Dec 2024 412th TJK-S 537 149 12ms 6 Nov 2025 415th Drew-j-Smith 533 150 12ms 6 Jun 2022 415th danielharris0 533 150 12ms 17 Jun 2023 417th markbyrne 530 151 12ms 26 Oct 2020 417th Kasci 530 151 61ms 7 Dec 2021 417th wa1ker38552 530 151 13ms 23 May 2023 417th dylanjones92 530 151 13ms 29 Jan 2024 417th clayboll99 530 151 13ms 14 Jul 2025 422nd febiw 526 152 12ms 22 Mar 2020 423rd louisbosqui 523 153 18ms 31 Dec 2020 423rd Re-Adventures 🇮🇳 523 153 13ms 15 Feb 2022 425th HassanAliKadhem 🇧🇭 516 155 12ms 4 Jan 2022 425th AnnoyedArt1256 516 155 20ms 22 Jan 2022 425th Azearia 516 155 19ms 21 Feb 2024 428th OppositeShark 513 156 13ms 9 Apr 2022 428th zt14427 513 156 13ms 28 Dec 2024 430th GeryonDev 506 158 12ms 13 Oct 2020 431st goombado 503 159 18ms 8 Feb 2020 431st gnash117 503 159 12ms 31 Dec 2020 433rd ToE42 500 160 13ms 9 May 2021 434th shibacho 🇯🇵 497 161 12ms 29 Nov 2021 435th janga1 494 162 12ms 11 Aug 2021 435th yokasuretsu 494 162 13ms 2 Jan 2025 437th OSYCh314 🇦🇺 491 163 18ms 16 Feb 2026 438th Frowny 488 164 13ms 16 Mar 2020 438th jmmographer 488 164 12ms 11 Nov 2023 438th EnisEfe0 488 164 19ms 18 May 2025 441st vodker1 482 166 13ms 8 Mar 2022 442nd 4ndyJ 🇬🇧 476 168 12ms 16 Jan 2023 443rd KiwiKoder0123 473 169 13ms 22 Oct 2019 444th volpi-m 🇫🇷 465 172 21ms 1 Sep 2020 445th Nibamot 462 173 13ms 21 Jan 2020 445th ashwinvis 462 173 12ms 19 Apr 2020 447th The3gs 457 175 13ms 13 Oct 2020 447th feherd 457 175 19ms 30 Aug 2021 449th Oscujic 449 178 14ms 11 Nov 2019 450th gamer0kayf1n3 442 181 13ms 5 May 2023 451st jameslindesay 428 187 11ms 26 Feb 2021 452nd SOONwasTaken 423 189 12ms 1 Oct 2025 453rd DGipe 400 200 20ms 6 May 2024 454th mikaelivarsson 396 202 20ms 28 Aug 2019 454th ellis-rix 396 202 13ms 19 May 2023 454th JakeDaCake36 396 202 12ms 21 Feb 2024 454th zwxzwxzwx21 396 202 14ms 12 May 2024 458th NuqieNoila 367 218 13ms 9 Aug 2019 458th jgermain48 367 218 13ms 8 Dec 2019 460th r-i-c-e 362 221 12ms 20 Jul 2023 461st UltimateGuy0987 357 224 12ms 14 Oct 2022 462nd felixcroc 346 231 17ms 19 Apr 2022 463rd leon-w 331 242 19ms 12 Jul 2019 464th HaiPaul 295 271 12ms 5 Mar 2024 465th joshuamkite 294 272 12ms 25 Aug 2023 466th Martin-Regan 288 278 13ms 13 Feb 2025 467th alfonsoalves 287 279 13ms 21 Jul 2024 468th MariuszPienkosz 263 304 12ms 20 May 2020 469th codefeld 242 331 13ms 20 Feb 2023 470th Zhenyu-Bo 194 413 13ms 1 Aug 2025 471st eli-siegel 190 422 13ms 23 Oct 2023 472nd AidanWalter 186 431 13ms 3 Jan 2025 473rd KatieLG-Transpiler 🇬🇧 5 15,911 83ms 23 Jun 2022 First Prev 401–473 of 473
