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?
K in bytes. Achievements Cheevos Holes Languages Medals Miscellaneous 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 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 # Hole Medal 1st 24 Game 🥈 2nd Arithmetic Numbers 🥇 3rd Arrows 🥇 4th Arrows 🥈 5th Ascending Primes 🥇 6th Billiards 🥇 7th Card Number Validation 🥈 8th Cubes 🥉 9th DFA Simulator 🥉 10th Diamonds 🥇 11th Emirp Numbers 🥇 12th Emirp Numbers (Long) 🥇 13th Evil Numbers 🥇 14th Evil Numbers (Long) 🥇 15th Factorial Factorisation 🥈 16th Farey Sequence 🥉 17th Fibonacci 🥇 18th Foo Fizz Buzz Bar 🥉 19th Forsyth–Edwards Notation 🥉 20th Game of Life 🥇 21st Happy Numbers 🥇 22nd Happy Numbers (Long) 🥇 23rd Hexdump 🥈 24th Hilbert Curve 🥈 25th Intersection 🥇 26th ISBN 🥇 27th Jacobi Symbol 🥉 28th Kaprekar Numbers 🥇 29th Kolakoski Sequence 🥇 30th Levenshtein Distance 🥈 31st Look and Say 🥉 32nd Lucky Numbers 🥉 33rd Lucky Tickets 🥇 34th Mahjong 🥇 35th Mandelbrot 🥈 36th Maze 🥇 37th Medal Tally 🥉 38th Minesweeper 🥇 39th Morse Decoder 🥇 40th Morse Encoder 🥇 41st Multitap Input 🥈 42nd Musical Chords 🥇 43rd N Queens 🥇 44th Niven Numbers 🥇 45th Niven Numbers (Long) 🥇 46th Number Spiral 🥈 47th Odious Numbers 🥇 48th Odious Numbers (Long) 🥇 49th PalindromemordnilaP 🥉 50th Partition Numbers 🥇 51st Pascal’s Triangle 🥇 52nd Pernicious Numbers (Long) 🥇 53rd Poker 🥈 54th Polyominoes 🥇 55th Prime Numbers 🥇 56th Prime Numbers (Long) 🥇 57th Proximity Grid 🥈 58th QR Decoder 🥇 59th Quine 🥇 60th Recamán 🥇 61st Reversi 🥇 62nd Rock-paper-scissors-Spock-lizard 🥇 63rd Rule 110 🥇 64th Scrambled Sort 🥈 65th Set 🥇 66th Seven Segment 🥇 67th SI Units 🥇 68th Sierpiński Triangle 🥇 69th Smith Numbers 🥈 70th Star Wars GPT 🥇 71st Star Wars Opening Crawl 🥈 72nd Sudoku 🥇 73rd Sudoku (Fill-in) 🥇 74th Ten-pin Bowling 🥇 75th Time Distance 🥇 76th Topological Sort 🥇 77th Trinomial Triangle 🥇 78th United States 🥇 79th Zodiac Signs 🥈