The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 6 days. Why not try and solve them ahead of time?
99 Bottles of Beer in Python 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 317th JudeTyrrell 421 280 10ms 5 Oct 2024 317th croc54 421 280 16ms 22 Dec 2024 317th Coolbeansyeah 421 280 11ms 18 Feb 2026 324th SpeedyNinja 420 281 17ms 20 Oct 2020 324th itsbjoern 420 281 10ms 11 Dec 2020 324th SimonSieber 420 281 17ms 25 Nov 2022 324th smilesformiles3 420 281 10ms 11 Jun 2025 324th davidludwik2370 420 281 18ms 17 days ago 329th myfatemi04 418 282 10ms 11 Jan 2018 329th bkshrader 418 282 16ms 11 Jan 2019 329th buffalocat 418 282 10ms 3 May 2021 329th celiendonze 🇨🇭 418 282 10ms 22 Jun 2023 329th msbranicky 418 282 17ms 25 Jul 2023 329th AbhilashaTandon 418 282 10ms 21 Sep 2023 335th dymowski 417 283 11ms 12 Jul 2019 335th clementblaudeau 417 283 17ms 1 Jun 2021 335th hiichbindermax 417 283 10ms 25 Feb 2022 335th Xzyaihni 417 283 17ms 16 Jan 2024 335th codingisgreatbutiamnot 417 283 9ms 14 Jul 2024 335th OSYCh314 🇦🇺 417 283 10ms 21 Nov 2024 335th p214974_edj 417 283 10ms 17 Sep 2025 342nd tzlils 415 284 10ms 25 Mar 2023 342nd quimey 415 284 10ms 21 Jul 2023 342nd VictorStenvers 🇳🇱 415 284 10ms 2 Oct 2024 342nd xiaoyiming123 415 284 10ms 13 Aug 2025 346th mmniaziqb 414 285 17ms 15 May 2018 346th 77Tigers 414 285 16ms 7 Feb 2021 346th CedricGebistorf 414 285 10ms 11 Mar 2022 346th AlexanderFair 414 285 10ms 20 Jul 2023 346th kbeat 🇰🇿 414 285 10ms 18 May 2025 346th Luke44565 414 285 16ms 25 Jun 2025 346th wobblybits 414 285 10ms 16 Aug 2025 353rd sawall 413 286 17ms 17 Aug 2019 353rd JackGiffordRA 413 286 10ms 12 Jun 2020 353rd Dazza314 🇬🇧 413 286 10ms 1 Nov 2020 353rd dtaylor0 413 286 17ms 25 Dec 2022 353rd bobbysq 413 286 9ms 2 May 2023 353rd RobertHoeh 413 286 16ms 5 Dec 2023 353rd yousefalizadeh 413 286 9ms 3 Apr 2024 353rd santiagvalencia 413 286 17ms 29 Apr 2025 361st MichaelMBradley 🇨🇦 411 287 17ms 26 Feb 2022 361st Wildst 411 287 9ms 20 Jul 2022 361st starfihs 411 287 10ms 1 Mar 2025 361st vhoulbreque 🇫🇷 411 287 9ms 28 Nov 2025 365th myleopard 410 288 17ms 29 Jan 2021 366th stordev 408 289 11ms 26 Feb 2021 366th scpchicken 🇵🇼 408 289 13ms 12 Mar 2022 366th GulgDev 408 289 11ms 22 Mar 2023 366th M4rc0g1 408 289 10ms 15 Nov 2025 370th TheAristos 407 290 10ms 25 Oct 2019 370th itiievskyi 🇺🇦 407 290 10ms 10 Aug 2020 370th dzshn 407 290 10ms 25 Nov 2020 370th firegene 🇮🇪 407 290 17ms 1 Apr 2023 370th markusgraube 407 290 11ms 13 Apr 2023 370th lelbal 407 290 10ms 15 Sep 2025 370th FoxInTheClouds 407 290 10ms 8 Feb 2026 377th ari-gutierrez 405 291 10ms 23 Oct 2018 377th AkashTandon167 405 291 9ms 19 Jan 2021 377th julienlamoureux78 405 291 11ms 17 Aug 2022 377th drewburr 405 291 11ms 28 Nov 2022 377th BenjaminHGong 405 291 10ms 22 Jan 2024 382nd zdzc 404 292 10ms 3 Mar 2018 382nd Trunksistor 🇫🇷 404 292 11ms 8 Apr 2022 382nd mrnomm 404 292 10ms 12 Aug 2022 382nd SubsTheTechnomancer 404 292 10ms 27 Feb 2023 382nd eddvrs 404 292 10ms 21 Dec 2023 382nd jacekwladzinski 404 292 10ms 4 Oct 2025 382nd Nikinator2704 404 292 18ms 31 Oct 2025 382nd mossiegoat 404 292 10ms 28 Jan 2026 390th guliyevemil1 🇦🇿 403 293 9ms 16 Apr 2020 390th NanduBC 403 293 12ms 17 Mar 2021 390th Jaydosu 403 293 11ms 22 Oct 2021 390th 5space 403 293 10ms 13 Apr 2022 390th 6lr61 403 293 10ms 1 Dec 2022 390th sandorstormen 403 293 9ms 11 Mar 2023 396th ionutm82 401 294 16ms 12 Nov 2018 396th decorator-factory 401 294 9ms 19 May 2019 396th wrjv 401 294 10ms 7 Jul 2021 396th colraw 🇸🇪 401 294 16ms 21 Jan 2023 396th mbittner20 401 294 11ms 28 Feb 2023 First Prev 321–400 of 1,100 Next Last
