All files / leetCode 0013.ts

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5x
 
 
 
 
 
 
 
 
 
5x
 
5x
14x
14x
 
14x
5x
 
9x
 
 
5x
 
 
export default function romanToInt(s: string): number {
  const map = new Map<string, number>([
    ['I', 1],
    ['V', 5],
    ['X', 10],
    ['L', 50],
    ['C', 100],
    ['D', 500],
    ['M', 1000],
  ])
 
  let sum = map.get(s.charAt(s.length - 1)) as number
 
  for (let i = s.length - 2; i >= 0; i--) {
    const num1 = map.get(s.charAt(i)) as number
    const num2 = map.get(s.charAt(i + 1)) as number
 
    if (num1 < num2)
      sum -= num1
    else
      sum += num1
  }
 
  return sum
}