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?
Gray Code Decoder in all languages 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 241st BREMAUCY 🇫🇷 0 79 18ms 2 days ago 241st Andrey2001 0 79 18ms 44 hours ago 241st edsrzf 🇳🇿 0 79 30ms 26 hours ago 241st madex 🇩🇪 0 79 416ms 13 hours ago 245th Shanethegamer 🇺🇸 0 80 5ms 3 Jun 2025 245th error256 0 80 466ms 16 Jan 2026 245th stefangimmillaro 0 80 19ms 31 hours ago 245th albanian-laundromat 0 80 29ms 30 hours ago 249th Shanethegamer 🇺🇸 0 81 348ms 3 Jun 2025 250th bricknellj 0 82 17ms 30 Jan 2025 250th dokutan 0 82 17ms 15 Aug 2025 250th scpchicken 🇵🇼 0 82 402ms 2 days ago 250th KatieLG 🇬🇧 0 82 18ms 2 days ago 250th madex 🇩🇪 0 82 4ms 2 days ago 250th MeWhenI 🇻🇦 0 82 114ms 12 hours ago 256th GolfingSuccess 🇬🇷 0 83 114ms 12 Jan 2026 256th GolfingSuccess 🇬🇷 0 83 386ms 12 Jan 2026 256th error256 0 83 430ms 12 Jan 2026 256th albanian-laundromat 0 83 9ms 26 Jan 2026 256th edsrzf 🇳🇿 0 83 473ms 29 hours ago 256th edsrzf 🇳🇿 0 83 1,251ms 28 hours ago 256th edsrzf 🇳🇿 0 83 106ms 107 mins ago 263rd Shanethegamer 🇺🇸 0 85 6ms 13 Dec 2024 263rd edsrzf 🇳🇿 0 85 1,065ms 25 May 2025 263rd albanian-laundromat 0 85 92ms 6 Dec 2025 263rd GolfingSuccess 🇬🇷 0 85 25ms 14 Jan 2026 263rd edsrzf 🇳🇿 0 85 28ms 27 hours ago 268th kg583 🇺🇸 0 86 23ms 2 Oct 2025 268th GolfingSuccess 🇬🇷 0 86 2,109ms 17 days ago 270th sean-niemann 🇺🇸 0 87 42ms 9 May 2025 270th CaedenHarper 🇨🇦 0 87 439ms 36 hours ago 272nd muser-logiccpu 🇺🇦 0 88 72ms 2 Sep 2025 272nd solisolu 0 88 3ms 11 Nov 2025 272nd albanian-laundromat 0 88 1,372ms 5 Jan 2026 272nd error256 0 88 3,067ms 14 Jan 2026 272nd IanUtley 0 88 2,941ms 16 Jan 2026 277th Shanethegamer 🇺🇸 0 89 99ms 13 Dec 2024 277th GolfingSuccess 🇬🇷 0 89 64ms 12 Jan 2026 279th sean-niemann 🇺🇸 0 90 7ms 10 May 2025 279th dokutan 0 90 65ms 8 Feb 2026 281st ovs-code 🇩🇪 0 91 261ms 13 Dec 2025 281st error256 0 91 62ms 12 Jan 2026 281st error256 0 91 293ms 14 Jan 2026 281st GolfingSuccess 🇬🇷 0 91 272ms 14 Jan 2026 281st Natanaelel 🇸🇪 0 91 333ms 44 hours ago 286th Shanethegamer 🇺🇸 0 92 462ms 20 May 2025 286th Yax42 🇫🇷 0 92 68ms 42 hours ago 286th edsrzf 🇳🇿 0 92 18ms 4 hours ago 289th Yax42 🇫🇷 0 93 392ms 43 hours ago 290th Shanethegamer 🇺🇸 0 94 383ms 13 Dec 2024 290th edsrzf 🇳🇿 0 94 459ms 20 May 2025 290th MeWhenI 🇻🇦 0 94 396ms 16 hours ago 290th edsrzf 🇳🇿 0 94 6ms 9 hours ago 290th albanian-laundromat 0 94 6ms 9 hours ago 295th albanian-laundromat 0 95 114ms 6 Jan 2026 296th Shanethegamer 🇺🇸 0 96 427ms 3 Jun 2025 296th CaedenHarper 🇨🇦 0 96 416ms 38 hours ago 296th edsrzf 🇳🇿 0 96 32ms 37 hours ago 296th kumavale 0 96 155ms 7 hours ago 300th albanian-laundromat 0 97 44ms 6 Dec 2025 300th tomh1012 0 97 396ms 2 days ago 302nd error256 0 98 156ms 16 Jan 2026 302nd albanian-laundromat 0 98 135ms 23 Feb 2026 302nd edsrzf 🇳🇿 0 98 163ms 10 hours ago 305th Shanethegamer 🇺🇸 0 99 352ms 24 Sep 2025 306th edsrzf 🇳🇿 0 100 145ms 9 May 2025 306th emgordon154 0 100 7ms 9 May 2025 306th JOrE20 0 100 42ms 15 Dec 2025 309th rucin93 🇵🇱 0 101 373ms 21 days ago 310th fantaize 0 102 148ms 15 days ago 310th emgordon154 0 102 4ms 32 hours ago 310th Lv0Sys 🇵🇱 0 102 403ms a min ago 313th CLOStrophobic 🇮🇹 0 104 21ms 18 Jan 2025 313th kasarino 0 104 4ms 17 hours ago 315th kg583 🇺🇸 0 106 38ms 9 May 2025 316th Shanethegamer 🇺🇸 0 107 8ms 9 May 2025 316th AlephSquirrel 0 107 20ms 14 May 2025 318th CLOStrophobic 🇮🇹 0 108 47ms 17 Feb 2025 318th edsrzf 🇳🇿 0 108 1,839ms 21 May 2025 318th albanian-laundromat 0 108 31ms 5 Jan 2026 First Prev 241–320 of 354 Next Last