Leetcode 415. Add Strings

文章作者：Tyan
博客：noahsnail.com  |  CSDN  |  简书

1. Description

2. Solution

• Version 1

class Solution:
    def addStrings(self, num1: str, num2: str) -> str:
        result = ''
        length1 = len(num1)
        length2 = len(num2)

        if length1 < length2:
            num1, num2 = num2, num1
            length1, length2 = length2, length1

        flag = 0
        for i in range(-1, -length2 - 1, -1):
            temp = int(num1[i]) + int(num2[i]) + flag
            flag = 1 if temp > 9 else 0
            result = str(temp % 10) + result
        for i in range(-length2 - 1, -length1 - 1, -1):
            temp = int(num1[i]) + flag 
            flag = 1 if temp > 9 else 0
            result = str(temp % 10) + result
        if flag:
            result = str(flag) + result
        return result

Reference

1. https://leetcode.com/problems/add-strings/