/code-golf-hole-5

A technical challenge

Primary LanguageJavaScriptMIT LicenseMIT

Code Golf: Hole 5

Introduction

Code Golf is a competition where given a programming prompt, the shortest source code (measured in bytes) to fully implement the prompt wins the challenge. Ties are broken by the first golfer to submit a solution of a given size.

Challenge

An evil wizard has sent you (and your laptop) back in time to ancient Rome. He says if you want to return to 2017, you must write him a program that converts numbers from Roman numerals to Arabic numerals.

He will cast a spell to run your program with numbers as Roman numerals between I and MMXVII as the first argument. Your program must print the equivalent number in Arabic numerals to stdout. Only after your program has converted all the numbers will the wizard return you to modern times.

$ node my-solution.js 'CXXIII'
123
$ python3 my-solution.py 'CXXIII'
123
$ ruby my-solution.rb 'CXXIII'
123
$ go run my-solution.go 'CXXIII'
123

Rules

  • The languages are limited to JavaScript (Node.js 6.9), Python (3.6), Ruby (2.4), and Golang (1.8.1).
  • Your submission is limited to a single file.
  • A single number in Roman numerals is provided as the first argument.
    • The Roman numerals will always be "valid" (no characters out of place).
    • Valid characters for roman numerals are I, V, X, L, C, D, and M
    • See Roman numeral rules
  • A single number in Arabic numerals (0-9) must be printed to stdout, and it must be equal to the number in Roman numerals.
    • The number must be a positive integer and have no leading zeroes.
  • Do not look up solutions online, use your brain.
  • Solve the problem for arbitrary input, don't try to cheat the scoring script.

Scoring

Please submit a single file (.js, .py, .rb, or .go). The included node script code-golf.sh will be used to score your file. To run this script, you must have Node.js installed.

macOS

$ ./code-golf.js my-solution.js
Your score is 456

Windows

C:\> node code-golf.js my-solution.js
Your score is 456

Docker

$ docker build -t golf .
$ docker run -it -v "$PWD":/src golf bash
$ ./code-golf.js my-solution.js
Your score is 456

golf