Leetcode - Multiply Strings Solution
Given two non-negative integers num1
and num2
represented as strings, return the product of num1
and num2
, also represented as a string.
Note: You must not use any built-in BigInteger library or convert the inputs to integer directly.
Example 1:
Input: num1 = "2", num2 = "3"
Output: "6"
Example 2:
Input: num1 = "123", num2 = "456"
Output: "56088"
Constraints:
1 <= num1.length, num2.length <= 200
num1
andnum2
consist of digits only.- Both
num1
andnum2
do not contain any leading zero, except the number0
itself.
Solution in Python
class Solution:
def multiply(self, num1: str, num2: str) -> str:
def to_numeric(num):
new = 0
for index,val in enumerate(reversed(num)):
new += (ord(val)-48)*10**index
return new
return str(int(num1)*int(num2))