数据结构算法操作试题(C++/Python)——两数相除

class Solution(object):
	def divide(self, dividend, divisor):
        """
        :type dividend: int
        :type divisor: int
        :rtype: int
        """
        if divisor == 1:
            return dividend
        if divisor == -1:
            if -dividend > 2**31-1:
                return 2**31-1
            else :
                return -dividend
        if abs(dividend) < abs(divisor):
            return 0
        flag = 1
        if dividend >= 0 > divisor or dividend <= 0 < divisor :
            flag = -1
            
        tmpDividend = abs(dividend)     
        tmpDivisor = abs(divisor)      
        result = 0                      
        fac = 1                         
        incDivisor = tmpDivisor         
        
        while tmpDividend >= tmpDivisor :

            if tmpDividend < incDivisor :
                incDivisor = tmpDivisor
                fac = 1
            tmpDividend -= incDivisor
            result += fac
            incDivisor += incDivisor
            fac += fac
            
        return result*flag