48.不用加减乘除做加法(python)

题目描述

java

public class Solution {
    public int Add(int num1,int num2) {
        while (num2!=0) {
            int temp = num1^num2;
            num2 = (num1&num2)<<1;
            num1 = temp;
        }
        return num1;
    }
}

python

class Solution:
    def Add(self, num1, num2):
        # write code here
        while num2!=0:
            sum_ = num1 ^ num2
            carry = (num1 & num2)<<1
            num1=sum_%0x100000000
            num2=carry%0x100000000
        if num1<=0x7FFFFFFF:
            return num1
        else:
            return num1 |(~0x100000000+1)