12.js

/** ------------------------------------------------------------------------------
 * 
 * 12. Integer to Roman
 * Topics: Hash Table
 * https://leetcode.com/problems/integer-to-roman/description/
 * 
 ------------------------------------------------------------------------------ */

/**
 * 신박한 풀이
 */
const roman = {
  M: 1000,
  CM: 900,
  D: 500,
  CD: 400,
  C: 100,
  XC: 90,
  L: 50,
  XL: 40,
  X: 10,
  IX: 9,
  V: 5,
  IV: 4,
  I: 1,
}

/**
 * @param {number} num
 * @return {string}
 */
var intToRoman = function (num) {
  if (num === 0) return ""

  let answer = ""

  for (const [key, value] of Object.entries(roman)) {
    let remain = Math.floor(num / value)
    answer += key.repeat(remain)
    num = num % value
  }

  return answer
}

console.log()