Reverse Polish Notation in Ruby 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 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 ArkScript 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 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 ArkScript 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 1st Lydxn 🇨🇦 1,000 44 98ms 21 Aug 2022 2nd sisyphus-ppcg 🇦🇺 936 47 40ms 18 Feb 2022 3rd akshatj27 🇦🇶 830 53 41ms 14 Feb 2022 3rd MeWhenI 🇻🇦 830 53 77ms 25 Jul 2023 3rd Steffan153 🇫🇮 830 53 42ms 20 Aug 2024 3rd radarek 🇵🇱 830 53 74ms 27 Dec 2024 7th primo-ppcg 🇹🇭 815 54 41ms 14 Feb 2022 7th janlelis 815 54 89ms 21 Sep 2024 7th ovs-code 🇩🇪 815 54 42ms 27 Dec 2024 7th sean-niemann 🇺🇸 815 54 39ms 3 Aug 2025 7th Natanaelel 🇸🇪 815 54 52ms 10 Feb 2026 12th JayXon 🇺🇸 786 56 46ms 23 Feb 2025 12th pardouin 🇫🇷 786 56 72ms 12 Sep 2025 14th stefangimmillaro 772 57 43ms 18 Feb 2022 14th tatzyr 🇯🇵 772 57 44ms 26 Feb 2025 16th Shanethegamer 🇺🇸 759 58 63ms 13 Feb 2022 16th SirBogman 🇺🇸 759 58 58ms 10 Jan 2024 18th shinh 746 59 45ms 21 Jun 2022 18th lacrosse 746 59 49ms 13 Dec 2025 20th snoozingnewt 🇨🇦 733 60 47ms 12 Feb 2026 21st rniii 721 61 57ms 15 Sep 2023 21st olleicua 🇺🇸 721 61 45ms 6 Jan 2024 21st anter69 🇭🇺 721 61 95ms 2 Apr 2024 21st xsot 🇸🇬 721 61 48ms 23 Apr 2025 21st beirigo 🇧🇷 721 61 41ms 17 Oct 2025 26th nwellnhof 🇩🇪 710 62 55ms 4 Jun 2022 26th KL-Lru 710 62 55ms 29 Dec 2022 26th KatieLG 🇬🇧 710 62 66ms 2 Oct 2025 29th ChiefChippy2 688 64 52ms 12 Feb 2022 29th GrayJoKing 🇦🇺 688 64 44ms 13 Feb 2022 31st olivermrose 🇺🇸 677 65 39ms 15 Apr 2022 32nd scpchicken 🇵🇼 667 66 52ms 13 Feb 2022 33rd edsrzf 🇳🇿 657 67 53ms 14 Feb 2026 33rd denkyuu1 657 67 43ms 11 days ago 35th adoxography 647 68 48ms 20 Mar 2022 36th jared-hughes 638 69 43ms 10 Sep 2022 37th emgordon154 611 72 43ms 20 Nov 2024 37th Lv0Sys 🇵🇱 611 72 38ms 6 Dec 2025 39th m-tkach 🇺🇦 595 74 51ms 25 Jun 2024 40th DialFrost 🇸🇬 571 77 47ms 25 Dec 2024 41st rucin93 🇵🇱 557 79 37ms 31 May 2025 42nd CaedenHarper 🇨🇦 537 82 42ms 13 Sep 2025 43rd TheZwierzLF 🇵🇱 512 86 37ms 20 Dec 2025 44th akiratee 506 87 37ms 20 Oct 2025 45th annaproxy 494 89 47ms 14 Sep 2023 46th aksyristos 489 90 53ms 8 Feb 2023 47th truisseaux 130 338 57ms 12 Apr 2024 48th KatieLG-Transpiler 🇬🇧 48 909 54ms 5 Jan 2023 1–48 of 48