The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 5 days. Why not try and solve them ahead of time?
Look and Say 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 237th cingulataluke 643 115 10ms 29 Aug 2023 237th Andrey2001 643 115 9ms 6 Dec 2025 243rd LlamaLad7 🇬🇧 638 116 10ms 16 Jan 2021 243rd SniperSmiley 🇺🇸 638 116 10ms 5 Sep 2022 243rd MaxElf999 638 116 10ms 28 Sep 2022 243rd RyGuy101 638 116 10ms 19 Jul 2023 243rd anonymaew 638 116 12ms 2 Aug 2023 243rd resoNathan 638 116 10ms 26 Apr 2024 243rd BlankSpruce 638 116 11ms 3 Sep 2025 243rd madeforlosers 638 116 10ms 11 Nov 2025 251st ydevor 🇮🇱 632 117 10ms 3 Dec 2020 251st raymur 632 117 10ms 26 Jan 2022 251st dokutan 632 117 10ms 4 Apr 2025 254th wrhm 627 118 15ms 12 Dec 2020 254th artieleach 627 118 10ms 8 Feb 2021 254th galloj 🇨🇿 627 118 10ms 17 Aug 2022 254th glesnick 627 118 11ms 18 Aug 2022 254th AstroOrbis 627 118 10ms 25 Nov 2025 259th Fishron 622 119 11ms 24 Oct 2021 259th VilBoub 622 119 10ms 17 Apr 2022 259th AlbertCoolGuy 622 119 10ms 3 Dec 2022 259th roguh 🇬🇹 622 119 11ms 9 Jan 2024 263rd ellis-rix 617 120 10ms 24 Feb 2022 263rd MichaelMBradley 🇨🇦 617 120 10ms 13 Apr 2022 263rd Alban-Boissard 617 120 11ms 14 Jun 2025 266th Pena86 612 121 10ms 19 Feb 2021 266th NanduBC 612 121 14ms 20 Mar 2021 266th lemogne 612 121 9ms 8 Aug 2021 266th tobyLovick 612 121 10ms 13 Dec 2023 270th b4dpxl 607 122 10ms 3 Nov 2021 271st ethandhunt 602 123 10ms 15 Aug 2021 271st HumanoidCPU 602 123 9ms 23 May 2024 273rd Trunksistor 🇫🇷 597 124 11ms 22 Apr 2022 273rd Eugen-str 597 124 10ms 1 Nov 2023 273rd yuchuehw 597 124 10ms 18 Jan 2024 273rd Stockoh 🇫🇷 597 124 11ms 26 Apr 2024 273rd Rubiksmath 597 124 10ms 1 Oct 2024 273rd JunkIce 597 124 9ms 3 Dec 2024 273rd calebaitken 597 124 15ms 17 Apr 2025 280th lmolteno 592 125 9ms 7 Mar 2021 280th matricronia 592 125 9ms 6 May 2021 280th clementblaudeau 592 125 12ms 5 Oct 2021 280th mathb0y512 592 125 10ms 26 Nov 2022 280th Florian-Mt 592 125 10ms 2 Oct 2023 280th FCORMERAIS 592 125 10ms 7 Mar 2024 286th ValdeQwerty 587 126 10ms 31 May 2023 286th firegene 🇮🇪 587 126 9ms 30 Jul 2024 286th starfihs 587 126 46ms 23 Feb 2025 289th mhenion8293 🇺🇸 583 127 10ms 19 Jan 2022 289th tooningelaere 583 127 10ms 4 Dec 2022 289th randolchance 583 127 10ms 24 Jan 2023 289th clemmers 🇺🇸 583 127 10ms 30 Jul 2023 289th brimstonetrader 583 127 10ms 18 Dec 2023 294th hjcafaroUC 578 128 11ms 29 May 2021 294th hymanimy 578 128 10ms 3 Aug 2021 294th AZ9tumas 578 128 48ms 12 Oct 2022 294th TheCod-r 🇦🇶 578 128 10ms 18 Feb 2023 298th CodeAltF4 574 129 15ms 8 Mar 2022 298th pmooreh 574 129 10ms 19 Aug 2022 300th michelebastione 🇮🇹 569 130 10ms 4 Dec 2020 300th Ellipsibus 569 130 10ms 9 Aug 2022 300th logvp 569 130 12ms 12 Jan 2024 300th geooff 569 130 10ms 11 May 2024 300th Mabeloid 🇳🇴 569 130 11ms 11 Sep 2024 305th Ailko 🇧🇪 565 131 12ms 6 May 2022 305th try-except-try-accept 🇹🇭 565 131 11ms 28 Jun 2022 305th Glinte 565 131 10ms 13 Dec 2023 308th wirewolf010 561 132 10ms 5 Jan 2022 308th ademdj19 561 132 10ms 12 Apr 2022 308th Bergschaf 561 132 9ms 24 Dec 2023 311th Andrey135296 556 133 10ms 23 Sep 2024 311th WillowWispy 556 133 22ms 17 Mar 2025 313th twocatsinatrenchcoat 552 134 11ms 12 Jul 2022 313th elephantpanda 552 134 11ms 31 Aug 2022 313th epic-programmer-guy 552 134 10ms 20 Dec 2023 313th jusaka 552 134 10ms 7 days ago 317th richard-oelze 🇩🇪 548 135 10ms 26 May 2021 317th qwjhvbxi 548 135 9ms 13 Feb 2024 317th Ralac07 🇦🇺 548 135 9ms 3 Jul 2024 317th robin-scragg 548 135 10ms 3 Oct 2025 First Prev 241–320 of 414 Next Last
