The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 33 hours. 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 320th CaedenHarper 🇨🇦 0 87 439ms 5 days ago 320th madex 🇩🇪 0 87 13ms 3 days ago 323rd muser-logiccpu 🇺🇦 0 88 72ms 2 Sep 2025 323rd albanian-laundromat 0 88 1,372ms 5 Jan 2026 323rd error256 0 88 3,067ms 14 Jan 2026 323rd IanUtley 0 88 2,941ms 16 Jan 2026 327th Shanethegamer 🇺🇸 0 89 107ms 13 Dec 2024 327th GolfingSuccess 🇬🇷 0 89 64ms 12 Jan 2026 329th sean-niemann 🇺🇸 0 90 7ms 10 May 2025 329th dokutan 0 90 65ms 8 Feb 2026 331st ovs-code 🇩🇪 0 91 261ms 13 Dec 2025 331st error256 0 91 62ms 12 Jan 2026 331st error256 0 91 293ms 14 Jan 2026 331st GolfingSuccess 🇬🇷 0 91 272ms 14 Jan 2026 331st Natanaelel 🇸🇪 0 91 333ms 5 days ago 331st Steffan153 🇫🇮 0 91 57ms 3 days ago 337th Shanethegamer 🇺🇸 0 92 462ms 20 May 2025 337th Yax42 🇫🇷 0 92 68ms 5 days ago 337th edsrzf 🇳🇿 0 92 18ms 4 days ago 340th Yax42 🇫🇷 0 93 392ms 5 days ago 341st Shanethegamer 🇺🇸 0 94 383ms 13 Dec 2024 341st edsrzf 🇳🇿 0 94 459ms 20 May 2025 341st MeWhenI 🇻🇦 0 94 396ms 4 days ago 341st edsrzf 🇳🇿 0 94 6ms 4 days ago 341st albanian-laundromat 0 94 6ms 4 days ago 341st madex 🇩🇪 0 94 99ms 43 hours ago 341st sean-niemann 🇺🇸 0 94 6ms 4 hours ago 348th albanian-laundromat 0 95 114ms 6 Jan 2026 349th Shanethegamer 🇺🇸 0 96 427ms 3 Jun 2025 349th CaedenHarper 🇨🇦 0 96 416ms 5 days ago 349th edsrzf 🇳🇿 0 96 32ms 5 days ago 349th kumavale 0 96 160ms 4 days ago 349th Steffan153 🇫🇮 0 96 30ms 9 hours ago 354th albanian-laundromat 0 97 44ms 6 Dec 2025 354th tomh1012 0 97 396ms 6 days ago 356th error256 0 98 155ms 16 Jan 2026 356th albanian-laundromat 0 98 135ms 23 Feb 2026 356th edsrzf 🇳🇿 0 98 157ms 4 days ago 359th Shanethegamer 🇺🇸 0 99 352ms 24 Sep 2025 359th madex 🇩🇪 0 99 19ms 43 hours ago 361st edsrzf 🇳🇿 0 100 145ms 9 May 2025 361st JOrE20 0 100 42ms 15 Dec 2025 361st madex 🇩🇪 0 100 113ms 43 hours ago 361st h3ra993huskp 🇯🇵 0 100 392ms 34 hours ago 365th rucin93 🇵🇱 0 101 373ms 25 days ago 365th madex 🇩🇪 0 101 141ms 44 hours ago 367th fantaize 0 102 150ms 19 days ago 367th emgordon154 0 102 4ms 5 days ago 367th madex 🇩🇪 0 102 156ms 3 days ago 370th Jacob385 0 103 386ms 44 hours ago 371st CLOStrophobic 🇮🇹 0 104 21ms 18 Jan 2025 371st kasarino 0 104 4ms 4 days ago 373rd kg583 🇺🇸 0 106 38ms 9 May 2025 374th Shanethegamer 🇺🇸 0 107 8ms 9 May 2025 374th AlephSquirrel 0 107 20ms 14 May 2025 376th CLOStrophobic 🇮🇹 0 108 47ms 17 Feb 2025 376th edsrzf 🇳🇿 0 108 1,839ms 21 May 2025 376th albanian-laundromat 0 108 31ms 5 Jan 2026 376th albanian-laundromat 0 108 83ms 20 days ago 380th kg583 🇺🇸 0 109 43ms 27 days ago 380th GolfingSuccess 🇬🇷 0 109 46ms 26 days ago 380th edsrzf 🇳🇿 0 109 43ms 5 days ago 380th edsrzf 🇳🇿 0 109 35ms 4 days ago 384th retrohun 0 111 41ms 6 days ago 385th GolfingSuccess 🇬🇷 0 112 44ms 24 Jan 2026 386th Shanethegamer 🇺🇸 0 114 1,281ms 9 May 2025 386th error256 0 114 513ms 29 Jan 2026 386th edsrzf 🇳🇿 0 114 489ms 4 days ago 389th emgordon154 0 115 80ms 3 days ago 390th GolfingSuccess 🇬🇷 0 117 283ms 12 Jan 2026 390th albanian-laundromat 0 117 43ms 19 days ago 390th elgan65536 🇺🇸 0 117 156ms 16 hours ago 393rd MeWhenI 🇻🇦 0 118 281ms 2 days ago 394th madex 🇩🇪 0 119 1,373ms 43 hours ago 395th CaedenHarper 🇨🇦 0 120 274ms 5 days ago 395th emgordon154 0 120 65ms 5 days ago 395th HumanoidCPU 0 120 401ms 4 hours ago 398th Shanethegamer 🇺🇸 0 121 148ms 13 Dec 2024 398th madex 🇩🇪 0 121 8ms 43 hours ago 400th albanian-laundromat 0 122 264ms 5 Jan 2026 First Prev 321–400 of 422 Next Last