The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 4 days. Why not try and solve them ahead of time?
Gray Code Decoder in all languages in chars. 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 Chars Time Submitted 320th CaedenHarper 🇨🇦 0 96 416ms 2 days ago 320th edsrzf 🇳🇿 0 96 32ms 2 days ago 320th kumavale 0 96 160ms 39 hours ago 324th albanian-laundromat 0 97 44ms 6 Dec 2025 324th tomh1012 0 97 396ms 3 days ago 326th error256 0 98 155ms 16 Jan 2026 326th albanian-laundromat 0 98 135ms 23 Feb 2026 326th edsrzf 🇳🇿 0 98 157ms 41 hours ago 329th Shanethegamer 🇺🇸 0 99 352ms 24 Sep 2025 330th edsrzf 🇳🇿 0 100 145ms 9 May 2025 330th emgordon154 0 100 7ms 9 May 2025 330th JOrE20 0 100 42ms 15 Dec 2025 333rd rucin93 🇵🇱 0 101 373ms 22 days ago 334th fantaize 0 102 150ms 16 days ago 334th emgordon154 0 102 4ms 2 days ago 334th madex 🇩🇪 0 102 156ms 20 hours ago 337th CLOStrophobic 🇮🇹 0 104 21ms 18 Jan 2025 337th kasarino 0 104 4ms 2 days ago 339th kg583 🇺🇸 0 106 38ms 9 May 2025 340th Shanethegamer 🇺🇸 0 107 8ms 9 May 2025 340th AlephSquirrel 0 107 20ms 14 May 2025 342nd CLOStrophobic 🇮🇹 0 108 47ms 17 Feb 2025 342nd edsrzf 🇳🇿 0 108 1,839ms 21 May 2025 342nd albanian-laundromat 0 108 31ms 5 Jan 2026 342nd albanian-laundromat 0 108 83ms 18 days ago 346th kg583 🇺🇸 0 109 43ms 24 days ago 346th GolfingSuccess 🇬🇷 0 109 46ms 24 days ago 346th edsrzf 🇳🇿 0 109 43ms 2 days ago 346th edsrzf 🇳🇿 0 109 35ms 34 hours ago 350th retrohun 0 111 41ms 3 days ago 351st GolfingSuccess 🇬🇷 0 112 44ms 24 Jan 2026 352nd Shanethegamer 🇺🇸 0 114 1,281ms 9 May 2025 352nd error256 0 114 513ms 29 Jan 2026 352nd edsrzf 🇳🇿 0 114 489ms 44 hours ago 355th emgordon154 0 115 80ms 13 hours ago 356th GolfingSuccess 🇬🇷 0 117 283ms 12 Jan 2026 356th albanian-laundromat 0 117 43ms 16 days ago 358th CaedenHarper 🇨🇦 0 120 274ms 2 days ago 358th emgordon154 0 120 65ms 2 days ago 360th Shanethegamer 🇺🇸 0 121 148ms 13 Dec 2024 360th elgan65536 🇺🇸 0 121 202ms 9 Feb 2026 362nd albanian-laundromat 0 122 264ms 5 Jan 2026 363rd stefangimmillaro 0 124 298ms 10 May 2025 363rd Shanethegamer 🇺🇸 0 124 147ms 3 Jun 2025 365th AstroOrbis 0 126 23ms 12 Aug 2025 365th btjones0 0 126 168ms 2 days ago 367th madex 🇩🇪 0 129 366ms 11 hours ago 368th JDiLenarda 🇫🇷 0 131 1,330ms 2 days ago 369th HumanoidCPU 0 133 165ms 2 days ago 370th edsrzf 🇳🇿 0 136 4,806ms 19 May 2025 371st GolfingSuccess 🇬🇷 0 137 93ms 40 hours ago 372nd Shanethegamer 🇺🇸 0 139 309ms 13 Dec 2024 372nd UnderKoen 🇳🇱 0 139 1,178ms 2 days ago 374th canissimia 🇦🇶 0 145 14ms 105 mins ago 375th Shanethegamer 🇺🇸 0 146 31ms 9 May 2025 376th emgordon154 0 185 1,780ms 38 hours ago 377th albanian-laundromat 0 192 201ms 11 mins ago 378th albanian-laundromat 0 207 1,465ms 6 Jan 2026 379th emgordon154 0 235 1,545ms 21 hours ago 380th albanian-laundromat 0 265 68ms 8 Dec 2025 381st MeWhenI 🇻🇦 0 286 231ms 44 hours ago First Prev 321–381 of 381
