問題:

Calculate the sum of two integers a and b, but you are not allowed to use the operator + and -.

Example:
Given a = 1 and b = 2, return 3.

class Solution(object):def getSum(self, a, b):""" :type a: int:type b: int:rtype: int""" if(0 == b):return asum1 = a^bcarry = (a&b)<<1return Solution().getSum(sum1,carry)if __name__ == '__main__'：l = Solution().getSum(3,7)print l

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轉載于:https://www.cnblogs.com/xautxuqiang/p/6008345.html

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