Divide Two Integers

最新推荐文章于 2021-05-07 19:18:17 发布

原创最新推荐文章于 2021-05-07 19:18:17 发布 · 374 阅读

0 ·

CC 4.0 BY-SA版权

本文介绍了一种在Python中实现整数除法的方法，通过判断符号位并转换为正数处理来简化运算过程，使用位移和累加实现快速除法。

class Solution:
    # @return an integer
    def divide(self, dividend, divisor):
        flag = False
        if (dividend < 0 and divisor > 0 ) or (dividend > 0 and divisor < 0 ) :
            flag = True
            if abs(dividend) < abs(divisor) :
                return 0 
            
        # for simplicity, record +/-, use a and b instead
        a = abs(dividend)
        b = abs(divisor)
        res = 0
        count = 0 
        
        while a >= b :
            sum = b
            count = 1 
            while sum + sum <= a :
                sum +=sum
                count+= count 
            a -= sum
            res += count
        if flag :
            res = -res 
        return res