The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 3 days. Why not try and solve them ahead of time?
Arrows in Python 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 epic-programmer-guy 253 388 14ms 30 Dec 2023 322nd vhoulbreque 🇫🇷 251 390 11ms 3 Apr 2024 323rd 5quiwyrm 246 398 12ms 2 Sep 2025 324th Bit125 245 400 15ms 31 Jan 2024 325th ramsay 242 405 14ms 9 Aug 2022 326th Pale-Vessel 241 406 14ms 19 Dec 2023 327th johnellis1392 239 410 14ms 6 Jan 2024 328th atazzam 🇺🇸 237 413 14ms 4 Apr 2022 329th Bananapants22 225 435 13ms 15 Aug 2022 330th AKASme 224 438 13ms 6 Apr 2025 331st amende14 221 444 11ms 2 Aug 2023 332nd eddvrs 217 451 15ms 21 Dec 2023 333rd ItsMeNoobieboy 215 455 14ms 23 Dec 2022 333rd HaiPaul 215 455 14ms 6 Mar 2024 335th murugan-k-0204 214 457 15ms 7 Oct 2022 336th EnisEfe0 214 459 14ms 13 Jun 2025 337th feherd 213 460 15ms 18 Apr 2022 338th CutSandstone 213 461 11ms 4 Jul 2024 339th RoscoeSmith 211 465 15ms 14 Sep 2022 339th TheLazySquid 211 465 15ms 22 Dec 2022 341st halp1 210 467 15ms 19 Apr 2022 342nd sciencejiho 209 468 15ms 17 Oct 2024 342nd muser-logiccpu 🇺🇦 209 468 11ms 23 Aug 2025 344th bthalheim 209 469 14ms 12 Sep 2022 345th NoneTheFewer 208 471 11ms 26 Dec 2025 346th croc54 206 475 13ms 23 Dec 2024 347th UriyaBA 204 480 14ms 25 Aug 2022 348th omero-san 203 483 13ms 18 Sep 2025 349th Thonoton 202 484 14ms 16 Mar 2023 350th zwxzwxzwx21 202 486 14ms 15 Jan 2024 351st jbrry 198 495 15ms 4 Jul 2022 352nd jusaka 193 507 11ms 9 days ago 353rd Brain-Boy-53 190 516 14ms 27 Jun 2024 354th kevinnaviapaiva 189 518 10ms 12 Feb 2025 355th KatieLG-Transpiler 🇬🇧 179 546 15ms 25 Jun 2022 356th arjunarya1 177 553 12ms 28 Aug 2025 357th jsvizcaino 175 559 15ms 3 Nov 2022 358th RobertBurs 171 574 15ms 18 Sep 2025 359th iamgamja 156 628 16ms 21 Mar 2023 360th MichaelClasby0 🇬🇧 151 650 15ms 16 Oct 2023 361st venkatesh1220 151 651 15ms 7 Oct 2022 362nd joshuamkite 141 695 16ms 20 Aug 2023 363rd sayloren 137 713 14ms 25 Feb 2023 364th fl3ur1nestimable 135 725 15ms 28 Mar 2022 365th dahappy1989 129 761 14ms 5 Nov 2023 366th Zhenyu-Bo 124 790 13ms 30 Jul 2025 367th Tasbia 110 887 11ms 28 Aug 2024 368th AidanWalter 87 1,128 15ms 3 Jan 2025 First Prev 321–368 of 368
