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 Encoder 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 321st Shanethegamer 🇺🇸 0 86 147ms 17 Dec 2024 321st kg583 🇺🇸 0 86 39ms 16 Feb 2025 321st GolfingSuccess 🇬🇷 0 86 44ms 7 May 2025 321st GolfingSuccess 🇬🇷 0 86 2,577ms 8 May 2025 321st sean-niemann 🇺🇸 0 86 496ms 25 Sep 2025 321st MeWhenI 🇻🇦 0 86 381ms 21 Nov 2025 321st GolfingSuccess 🇬🇷 0 86 399ms 12 Jan 2026 321st elgan65536 🇺🇸 0 86 168ms 24 days ago 321st CaedenHarper 🇨🇦 0 86 399ms 4 days ago 321st CaedenHarper 🇨🇦 0 86 153ms 3 days ago 321st edsrzf 🇳🇿 0 86 414ms 25 hours ago 321st emgordon154 0 86 406ms 12 hours ago 321st GolfingSuccess 🇬🇷 0 86 19ms 4 hours ago 334th Shanethegamer 🇺🇸 0 87 42ms 15 Apr 2025 334th Shanethegamer 🇺🇸 0 87 20ms 8 May 2025 334th albanian-laundromat 0 87 1,424ms 4 days ago 334th Yax42 🇫🇷 0 87 2,430ms 34 hours ago 338th kg583 🇺🇸 0 88 23ms 12 Feb 2026 338th fuzzylojik-golf 🇺🇸 0 88 152ms 2 days ago 340th Shanethegamer 🇺🇸 0 89 341ms 6 May 2025 340th Shanethegamer 🇺🇸 0 89 511ms 24 Sep 2025 340th DialFrost 🇸🇬 0 89 367ms 21 Nov 2025 340th CaedenHarper 🇨🇦 0 89 103ms 3 days ago 344th Yax42 🇫🇷 0 90 13ms 34 hours ago 345th GolfingSuccess 🇬🇷 0 91 14ms 13 Dec 2025 346th namelessiw 0 92 504ms 10 Oct 2025 346th fuzzylojik-golf 🇺🇸 0 92 383ms 2 days ago 346th madex 🇩🇪 0 92 12ms 29 hours ago 349th CaedenHarper 🇨🇦 0 93 13ms 4 days ago 350th DialFrost 🇸🇬 0 94 13ms 10 May 2025 350th edsrzf 🇳🇿 0 94 187ms 17 May 2025 350th edsrzf 🇳🇿 0 94 21ms 9 hours ago 353rd Yax42 🇫🇷 0 95 389ms 34 hours ago 354th GolfingSuccess 🇬🇷 0 96 182ms 7 May 2025 354th HumanoidCPU 0 96 160ms 28 hours ago 356th Shanethegamer 🇺🇸 0 98 7ms 6 May 2025 357th snydej 0 99 43ms 22 Nov 2024 357th albanian-laundromat 0 99 343ms 4 days ago 357th dokutan 0 99 409ms 16 hours ago 360th dokutan 0 100 19ms 16 hours ago 361st HumanoidCPU 0 101 361ms 6 hours ago 361st HumanoidCPU 0 101 382ms 4 hours ago 363rd sean-niemann 🇺🇸 0 102 286ms 8 May 2025 363rd Shanethegamer 🇺🇸 0 102 307ms 8 May 2025 363rd edsrzf 🇳🇿 0 102 295ms 9 May 2025 363rd GolfingSuccess 🇬🇷 0 102 306ms 9 May 2025 363rd ovs-code 🇩🇪 0 102 311ms 13 Dec 2025 363rd CaedenHarper 🇨🇦 0 102 301ms 4 days ago 363rd fuzzylojik-golf 🇺🇸 0 102 292ms 2 days ago 363rd emgordon154 0 102 274ms 22 hours ago 371st lukechampine 0 103 301ms 7 Jun 2025 371st chris124567 0 103 294ms 8 Jun 2025 371st albanian-laundromat 0 103 270ms 16 Dec 2025 371st GolfingSuccess 🇬🇷 0 103 336ms 14 Jan 2026 371st HumanoidCPU 0 103 329ms 3 hours ago 376th UnderKoen 🇳🇱 0 107 2,121ms 15 hours ago 377th kg583 🇺🇸 0 110 14ms 12 Jan 2026 378th GolfingSuccess 🇬🇷 0 111 107ms 2 hours ago 379th retrohun 0 112 16ms 38 hours ago 380th edsrzf 🇳🇿 0 114 30ms 9 hours ago 381st prestosilver 🇺🇸 0 115 418ms 37 hours ago 381st HumanoidCPU 0 115 260ms 3 hours ago 383rd emgordon154 0 116 69ms 2 mins ago 384th GolfingSuccess 🇬🇷 0 117 34ms 25 Dec 2025 385th emgordon154 0 119 56ms 23 hours ago 385th not-a-pokemon 0 119 15ms 13 hours ago 387th edsrzf 🇳🇿 0 127 58ms 18 hours ago 388th saito-ta 🇯🇵 0 128 1,990ms 8 May 2025 389th CaedenHarper 🇨🇦 0 129 446ms 4 days ago 390th Natanaelel 🇸🇪 0 130 360ms 2 May 2025 391st edsrzf 🇳🇿 0 134 22ms 2 hours ago 392nd Shanethegamer 🇺🇸 0 136 315ms 26 Nov 2024 393rd albanian-laundromat 0 137 27ms 4 days ago 394th GolfingSuccess 🇬🇷 0 138 336ms 8 May 2025 395th GolfingSuccess 🇬🇷 0 140 94ms 7 hours ago 395th edsrzf 🇳🇿 0 140 29ms 3 hours ago 397th canissimia 🇦🇶 0 143 15ms 22 hours ago 398th emgordon154 0 150 15ms 9 May 2025 398th albanian-laundromat 0 150 28ms 4 days ago 398th HumanoidCPU 0 150 4ms 2 hours ago First Prev 321–400 of 413 Next Last