DataWhale:leetcode Day43

一、leetcode地址

https://leetcode.com/problems/multiply-strings/

二、问题描述

三、代码实现

语言：Python3
代码：

class Solution:
    def multiply(self, num1: str, num2: str) -> str:
        if num1 == '0' or num2 == '0':return '0'
        l1 = len(num1);l2 = len(num2)
        result = 0;carrier1 = 1
        for i in range(l1):
            carrier2 = 1
            for j in range(l2):
                temp = int(num1[-(i+1)])*int(num2[-(j+1)])*carrier1*carrier2
                result += temp
                carrier2 *= 10
            carrier1 *= 10
        return str(result)

四、运行结果