The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 34 hours. Why not try and solve them ahead of time?
Fibonacci in Java 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 81st Attero 🇸🇪 600 95 387ms 14 May 2020 81st Irratix 🇳🇱 600 95 387ms 7 Oct 2020 81st BBoehm 🇩🇪 600 95 393ms 29 Oct 2020 81st KatieLG 🇬🇧 600 95 418ms 30 Nov 2020 81st janbehrens 🇩🇪 600 95 389ms 7 Dec 2020 81st inventshah 600 95 369ms 16 Apr 2021 81st neihousaigaai 600 95 394ms 26 May 2021 81st jakzo 600 95 378ms 10 Sep 2021 81st SirBogman 🇺🇸 600 95 366ms 14 Dec 2021 81st orthoplex 🇨🇽 600 95 393ms 7 Apr 2022 81st lukehewittvandy 600 95 391ms 19 Jul 2022 81st 5quiwyrm 600 95 403ms 30 Aug 2022 81st oceko 600 95 399ms 26 Nov 2022 81st astdefu 600 95 368ms 10 Dec 2022 81st Betuaredead 600 95 401ms 4 Jan 2023 81st Parma-Jon 600 95 380ms 17 Mar 2023 81st DardS8Br 600 95 391ms 8 Nov 2023 81st SadiinsoSnowfall 🇫🇷 600 95 368ms 14 Feb 2024 81st madeforlosers 600 95 404ms 22 Nov 2024 81st LordSir101 600 95 382ms 16 Sep 2025 101st retrohun 594 96 387ms 4 May 2020 101st hjcafaroUC 594 96 382ms 7 Aug 2020 101st yzhs 🇩🇪 594 96 355ms 30 Aug 2020 101st ReidZ3 🇺🇸 594 96 397ms 27 Nov 2020 101st YellowBunnyGit 594 96 407ms 19 Dec 2020 101st KrausRaus 🇺🇸 594 96 397ms 5 Mar 2021 101st Re-Adventures 🇮🇳 594 96 366ms 17 Mar 2021 101st PhysicDev 🇫🇷 594 96 390ms 27 May 2021 101st cbrt-x 594 96 403ms 10 Sep 2021 101st Luca2812 594 96 377ms 6 Dec 2021 101st jhpaques 🇫🇷 594 96 399ms 3 Dec 2022 101st Setvizan 594 96 383ms 6 Jan 2023 101st annaproxy 594 96 368ms 8 Jan 2023 101st Tavress 594 96 403ms 11 May 2023 101st aresok 594 96 363ms 28 Jun 2023 101st bkueppers 594 96 388ms 20 Sep 2023 101st bac0id 594 96 395ms 26 Sep 2023 101st eMGeeneer 594 96 385ms 31 Jul 2024 101st Macweese 594 96 351ms 3 Aug 2025 120th blasio99 588 97 392ms 2 Nov 2021 120th LHuitre 588 97 382ms 20 Apr 2022 120th lorenzosim 588 97 372ms 5 Aug 2022 120th Natanaelel 🇸🇪 588 97 379ms 30 Oct 2022 120th FlorianCassayre 🇫🇷 588 97 392ms 25 Jan 2023 120th enrico-canva 588 97 395ms 7 Aug 2023 120th ehulinsky 🇺🇸 588 97 377ms 16 Feb 2024 120th SpiritAxolotl 🇺🇸 588 97 395ms 22 Mar 2024 120th gabe-gallegos 588 97 401ms 19 May 2024 120th aliakseikalosha 588 97 395ms 8 Oct 2024 120th yoshykai 588 97 371ms 29 Mar 2025 131st trist224 🇫🇷 582 98 378ms 9 Nov 2022 131st scpchicken 🇵🇼 582 98 386ms 4 Feb 2023 131st plastic-bottle 582 98 353ms 15 Sep 2023 131st wh3n3v3r 🇨🇿 582 98 503ms 13 Nov 2024 135th marcin7Cd 576 99 404ms 7 Oct 2020 135th MichaelMBradley 🇨🇦 576 99 395ms 21 Mar 2022 135th Santarii 576 99 378ms 10 Jul 2022 135th lukashert 576 99 377ms 1 Mar 2023 135th roupiq 🇵🇱 576 99 374ms 19 Nov 2023 135th mathisfun271 576 99 374ms 19 Feb 2024 135th jonahwdean 576 99 400ms 30 May 2024 135th SwordF-Official 🇺🇸 576 99 390ms 12 Apr 2025 135th Iznoanygod 🇺🇸 576 99 333ms 16 Apr 2025 144th boxjelly 570 100 394ms 1 Mar 2021 144th ysthakur 570 100 393ms 3 May 2021 144th kayahr 570 100 406ms 18 Jun 2021 144th Leftykap 570 100 403ms 21 Aug 2022 144th Pyro569 570 100 390ms 31 Jul 2023 144th azka1368 570 100 380ms 1 Nov 2023 144th chartung17 570 100 386ms 31 Dec 2023 144th Mandrzejy 🇵🇱 570 100 372ms 31 Mar 2024 144th luca1339 570 100 399ms 23 Oct 2024 144th andrewjc2000 570 100 461ms 7 Mar 2025 144th Emutis 🇱🇹 570 100 333ms 4 Sep 2025 155th Omega65536 🇩🇪 564 101 369ms 23 Jun 2021 155th KingSkyrock 🇺🇸 564 101 388ms 18 Feb 2022 155th AndreaNeti 564 101 379ms 16 Jun 2022 158th mathwiz42 559 102 380ms 18 Aug 2020 158th DMiddendorf256 559 102 381ms 11 Dec 2020 158th godraadam 559 102 384ms 13 Apr 2021 First Prev 81–160 of 346 Next Last