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?
Fizz Buzz in Rust 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 237th Pale-Vessel 653 144 159ms 30 Dec 2024 237th h3ra993huskp 🇯🇵 653 144 119ms 13 Oct 2025 243rd paoda 648 145 159ms 6 Jul 2021 243rd NovemberOrWhatever 648 145 121ms 6 Nov 2022 243rd kimbo 🇺🇸 648 145 117ms 15 Feb 2024 243rd gurglemurgle5 648 145 117ms 26 Apr 2024 243rd UnusualEgg 648 145 124ms 17 Sep 2024 243rd fantaize 648 145 149ms 16 days ago 249th NatNgs 644 146 124ms 8 Jan 2020 249th rholliday 644 146 119ms 1 Mar 2021 249th GWStuart 644 146 127ms 24 Nov 2021 249th squidgyberries 644 146 127ms 22 Jan 2022 249th duvetfalling 644 146 127ms 25 Jan 2022 249th Feniske 🇫🇷 644 146 124ms 10 Oct 2022 249th spencersolberg 644 146 127ms 9 Aug 2023 249th RedzGoose 🇦🇺 644 146 115ms 11 Jun 2024 249th arrudagates 644 146 149ms 26 Jun 2024 258th Dash-L 639 147 150ms 22 Oct 2021 258th Tjwato 639 147 126ms 5 Jan 2022 258th MarkStockwellZA 639 147 133ms 5 Jan 2022 261st Pena86 635 148 120ms 27 May 2021 261st nsprd 635 148 155ms 17 Jan 2024 261st tylerlaprade 635 148 156ms 17 Jun 2025 264th MoustacheQM 631 149 143ms 7 Mar 2022 264th bogdan-cu 631 149 147ms 30 May 2023 264th MateuszPietrzak 🇵🇱 631 149 125ms 22 Nov 2023 267th neeldug 627 150 118ms 8 Sep 2020 267th mhenion8293 🇺🇸 627 150 135ms 5 Aug 2022 267th logancammish 627 150 138ms 21 Mar 2023 267th WatMan77 627 150 135ms 22 Aug 2023 267th Eugen-str 627 150 122ms 31 Oct 2023 267th hrubymar10 627 150 151ms 16 Feb 2024 267th qwunchy 627 150 124ms 15 Nov 2024 274th pandapawskat 623 151 124ms 30 Aug 2021 274th ConnorSMorrison 623 151 144ms 30 Sep 2022 276th wooster0 618 152 135ms 19 Jun 2021 276th coffeenotfound 618 152 141ms 18 Aug 2021 276th Pyro569 618 152 124ms 31 Jul 2023 276th ebobrow 618 152 125ms 17 Aug 2023 276th fishin-rod 618 152 134ms 17 Apr 2025 281st festiveelephantseal 🇺🇸 614 153 122ms 25 Dec 2020 281st soydev-hunter 614 153 122ms 25 Dec 2020 281st mad4j 🇮🇹 614 153 129ms 4 Jul 2021 281st Lampomaniac 🇳🇴 614 153 149ms 30 Dec 2021 281st leap0x7b 🇮🇩 614 153 127ms 21 Mar 2023 281st Amheus 614 153 169ms 7 Oct 2023 287th GarmOfGnipahellir 610 154 156ms 6 Jan 2020 287th Nexilis 🇵🇱 610 154 120ms 10 May 2020 289th julianbenegas 606 155 145ms 22 Sep 2022 289th StronkCheese 🇺🇸 606 155 131ms 18 May 2023 291st hemphen 603 156 116ms 23 Oct 2022 291st sreyfe 603 156 130ms 5 Jun 2024 293rd dc03 599 157 136ms 16 Sep 2020 293rd CrimsonAndRed 599 157 124ms 29 Aug 2021 293rd RoscoeDaWah 🇬🇧 599 157 124ms 13 Feb 2022 293rd KevinLaux 599 157 121ms 4 Dec 2022 293rd Jo0n4s 599 157 129ms 1 Mar 2024 298th enbyte 595 158 156ms 26 May 2021 299th Fluffyeater 588 160 120ms 21 May 2020 299th alexandre-lavoie 588 160 164ms 30 Jul 2020 299th shibacho 🇯🇵 588 160 158ms 3 Aug 2022 299th xnor-gate 588 160 129ms 20 Oct 2022 299th Blockyheadman 588 160 132ms 7 Nov 2025 304th nico-bachner 584 161 122ms 17 Jan 2021 304th 201170 584 161 136ms 11 Aug 2021 306th pythonNoobOz 580 162 120ms 21 Jun 2023 307th happy-turtle 577 163 118ms 29 Sep 2021 308th c410-f3r 573 164 133ms 4 Jan 2020 308th ForkKILLET 🇨🇳 573 164 148ms 27 Jul 2021 310th germania 566 166 119ms 4 Jan 2020 310th MysticalUser 566 166 123ms 11 Feb 2022 310th namelessiw 566 166 140ms 18 May 2023 310th heanyang1 566 166 126ms 22 Apr 2025 314th mwarvik 🇳🇴 563 167 145ms 16 Dec 2025 315th 53hornet 560 168 124ms 6 Jul 2022 316th SimonSieber 556 169 129ms 16 Oct 2025 317th violetastcs 547 172 157ms 5 Jan 2020 317th lordclips 547 172 163ms 9 Mar 2024 319th thomas-samoht 540 174 121ms 9 Dec 2024 320th marshallku 🇰🇷 537 175 132ms 21 Sep 2020 First Prev 241–320 of 370 Next Last