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 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 Gray Code Decoder Gray Code Encoder 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 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 Gray Code Decoder Gray Code Encoder 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 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 478th StupidHobbit 575 80 2ms 25 Nov 2025 478th westerntoad 575 80 2ms 27 Dec 2025 483rd NJRist 🇺🇸 568 81 1ms 24 Nov 2022 483rd s-gannon 568 81 12ms 3 May 2023 485th markus-rekdal 561 82 11ms 4 Jun 2019 485th stdstijn 561 82 2ms 10 May 2020 485th Adrien-AM 561 82 12ms 31 Jan 2022 485th CameronGBell 561 82 2ms 10 Nov 2022 485th dpethes 561 82 2ms 9 Jan 2024 485th PyryL 🇫🇮 561 82 2ms 23 Aug 2024 485th jorbDehmel 🇺🇸 561 82 1ms 20 Sep 2024 492nd PeriBooty 554 83 11ms 26 Nov 2019 492nd Smetalo 554 83 1ms 25 Aug 2022 492nd Qruintrox 554 83 2ms 24 Jun 2023 495th phpboyscout 548 84 2ms 26 May 2021 495th OttscoMC 548 84 1ms 18 Jun 2021 495th ANovelForStudy 548 84 1ms 9 Jun 2023 495th fkantelberg 548 84 2ms 15 Jul 2023 495th sbercx 548 84 11ms 29 Jul 2023 500th mxwli 541 85 1ms 16 May 2021 500th Kasci 541 85 2ms 7 Dec 2021 500th stonethurg 541 85 1ms 14 Feb 2023 500th VictorFordham 541 85 1ms 4 Mar 2023 500th ilovapples 541 85 2ms 9 Jun 2025 500th tsschepens 541 85 11ms 4 Mar 2026 506th drkameleon 🇪🇸 535 86 10ms 28 Jan 2020 506th ms-tingliang 535 86 2ms 6 Aug 2022 506th AZ9tumas 535 86 1ms 15 Oct 2022 506th GWStuart 535 86 2ms 15 Sep 2023 506th Giantnoodlemonster 535 86 2ms 15 Sep 2024 511th vonKrafft 529 87 2ms 25 Mar 2020 511th tm70 529 87 11ms 23 Jan 2021 511th ArianKG 529 87 1ms 21 Mar 2024 514th ottsco7697 523 88 1ms 3 Jul 2019 514th RustemB 🇷🇺 523 88 1ms 25 Aug 2020 514th TerenceTux 523 88 1ms 6 Jun 2023 514th BpbjsGreen 🇨🇳 523 88 1ms 7 Jul 2024 514th kurkale6ka 523 88 2ms 15 Aug 2024 519th ryguyNelson 517 89 1ms 12 Aug 2020 519th mhenion8293 🇺🇸 517 89 2ms 5 Jun 2021 519th ze-h 🇺🇸 517 89 1ms 19 Feb 2022 519th S-Ruban 517 89 1ms 26 Feb 2023 519th uncertaain 517 89 1ms 28 Dec 2023 519th tik25 517 89 1ms 28 Mar 2024 519th iilegacyyii 517 89 7ms 20 Jan 2025 526th humz2k 511 90 1ms 26 Sep 2022 526th Jaro32768 🇸🇰 511 90 1ms 20 Sep 2023 526th AstroOrbis 511 90 2ms 20 Jan 2026 529th Verlio-H 505 91 2ms 17 Feb 2025 530th lilyyy411 500 92 1ms 10 Sep 2021 530th bryanmytko 500 92 11ms 5 Jul 2022 530th 104210 500 92 2ms 14 Sep 2022 530th DrPiranoid 500 92 1ms 22 Sep 2022 534th sm1lko 495 93 2ms 7 Dec 2022 534th aDwarfNamedUrist 495 93 11ms 12 Jul 2023 534th Sephirem98 495 93 1ms 24 Oct 2023 534th Unknownuserfrommars 495 93 1ms 20 Nov 2024 534th 0xA00 495 93 11ms 4 Dec 2025 539th ArturLukianov 489 94 1ms 10 Aug 2020 539th Mortis66666 489 94 2ms 27 May 2022 539th PeytonNowlin 489 94 2ms 9 Oct 2025 542nd abailey2020 🇺🇸 484 95 2ms 3 Oct 2020 542nd lemmaandrew 484 95 2ms 23 Jan 2021 542nd zt14427 484 95 1ms 28 Feb 2023 542nd epic-programmer-guy 484 95 1ms 17 Dec 2023 542nd MID246 484 95 2ms 14 Nov 2024 547th dmoa 479 96 2ms 21 Mar 2021 547th shagunsingh30 479 96 1ms 2 Apr 2022 549th nico-bachner 474 97 1ms 28 Dec 2020 549th atazzam 🇺🇸 474 97 1ms 2 Sep 2022 551st GnotAGnelf 469 98 2ms 24 Nov 2020 551st kennyhow 469 98 1ms 27 Jan 2021 551st Robbe7730 469 98 1ms 17 Nov 2021 554th azure-blondon 460 100 2ms 18 Aug 2024 555th aaronze 🇦🇺 455 101 1ms 29 Apr 2021 555th NovemberOrWhatever 455 101 2ms 6 Nov 2022 557th 4ndyJ 🇬🇧 451 102 2ms 17 Dec 2022 558th cgjohannsen 447 103 2ms 10 Jun 2022 559th 52525rr 442 104 1ms 20 Oct 2025 560th MisterrLuck 438 105 1ms 11 Sep 2023 First 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