Fibonacci in C 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 Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz 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 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 Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight 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 Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz 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 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 Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 291st Ripick 807 57 1ms 30 Apr 2023 291st imma-Spring 807 57 1ms 2 Nov 2023 291st rsgray 807 57 2ms 29 Dec 2023 291st loganmacdougall 🇨🇦 807 57 1ms 19 Jan 2024 291st jbjd 807 57 1ms 24 Feb 2024 291st Jigglypuffed 807 57 1ms 15 Jul 2025 291st KAKISKA-code 🇫🇮 807 57 1ms 24 Sep 2025 291st FortuiteMan 🇫🇷 807 57 2ms 19 days ago 291st Pyroan 807 57 2ms 11 hours ago 310th MadMax129 793 58 2ms 25 Dec 2019 310th bastienvoirin 🇫🇷 793 58 1ms 24 Apr 2020 310th iddoroshenko 793 58 1ms 27 Jul 2020 310th LexouDuck 793 58 1ms 24 Oct 2020 310th Evoniuk 793 58 1ms 30 May 2021 310th KatieLG 🇬🇧 793 58 2ms 19 Jun 2021 310th AIn0n 793 58 2ms 11 Jul 2021 310th garrisonhh 793 58 2ms 15 Aug 2021 310th bakaq 793 58 1ms 9 Nov 2021 310th MichalMarsalek 🇨🇿 793 58 1ms 18 Aug 2022 310th Baxi-codes 793 58 1ms 25 Dec 2022 310th kallmi28 🇨🇿 793 58 2ms 20 Oct 2023 310th Maximizer02 793 58 2ms 1 Mar 2024 310th kellantech 793 58 2ms 37 hours ago 324th archee303 780 59 1ms 5 Feb 2020 324th SubsTheTechnomancer 780 59 1ms 22 Apr 2021 324th matricronia 780 59 1ms 27 May 2021 324th kayahr 780 59 2ms 18 Jun 2021 324th wansacis 🇩🇪 780 59 2ms 20 Aug 2021 324th VictorChemin 🇫🇷 780 59 1ms 24 Nov 2021 324th aguyon1 780 59 1ms 17 Jun 2023 324th 1231234md5 🇨🇳 780 59 1ms 20 Jan 2024 324th yuchuehw 780 59 2ms 6 Jun 2024 324th xyangst 780 59 2ms 15 Oct 2024 324th Maashau 780 59 2ms 18 days ago 335th shaneliu-zf 🇹🇼 767 60 1ms 6 Jul 2020 335th pkasting 767 60 2ms 6 Sep 2020 335th heypwesto 🇳🇿 767 60 1ms 20 Apr 2021 335th lesserfish 767 60 2ms 7 May 2021 335th Waterperry 767 60 1ms 2 Nov 2021 335th lemogne 767 60 1ms 13 Nov 2021 335th ClementCarre-BionomeeX 767 60 1ms 17 Nov 2021 335th stellartux 767 60 1ms 24 Dec 2023 335th kasarino 767 60 2ms 19 days ago 344th dc03 754 61 2ms 13 Sep 2020 344th Non-J 754 61 1ms 27 Sep 2020 344th isaiah0311 754 61 2ms 16 Feb 2023 344th inverseLorentz 🇦🇺 754 61 1ms 12 Oct 2023 344th logvp 754 61 1ms 1 Feb 2024 344th wh3n3v3r 🇨🇿 754 61 1ms 15 Nov 2024 344th mttcrn 754 61 3ms 22 Mar 2025 351st uier 742 62 1ms 28 Dec 2019 351st jakingy 742 62 1ms 8 Jul 2020 351st aliakseikalosha 742 62 1ms 25 Apr 2021 351st rchalamala 742 62 1ms 7 Aug 2021 351st Omega65536 🇩🇪 742 62 1ms 8 Jul 2022 351st TheRealOhead 🇺🇸 742 62 1ms 28 Nov 2022 351st n8pjl 742 62 2ms 29 Oct 2023 351st h-hh-hhh 🇺🇦 742 62 1ms 2 Nov 2024 351st andrewjc2000 742 62 2ms 7 Mar 2025 351st matejmatik123 🇸🇰 742 62 2ms 27 Jun 2025 351st gigaprofisi 🇺🇸 742 62 2ms 15 Nov 2025 362nd Tilka 730 63 2ms 3 May 2021 362nd petreleon 730 63 4ms 20 Oct 2021 362nd heabr12 730 63 1ms 6 Sep 2024 365th lukasmoellerch 719 64 2ms 3 May 2021 365th bijlpieter 719 64 2ms 19 Nov 2021 365th BruceMcRooster 719 64 2ms 25 Mar 2022 365th 201170 719 64 1ms 29 Jul 2022 365th H3Rol4x 719 64 1ms 5 Jan 2023 365th galloj 🇨🇿 719 64 2ms 7 Feb 2023 365th elektricM 719 64 1ms 22 Sep 2023 365th jacekwladzinski 719 64 1ms 2 Oct 2025 365th GodlyProgrammer1 719 64 2ms 15 Nov 2025 374th Batzuga 708 65 1ms 10 Sep 2019 374th rosvik 🇳🇴 708 65 1ms 29 Apr 2020 First Prev 301–375 of 592 Next Last