leetcode: 7.Reverse Integer

Topic

Reverse digits of an integer.

Example

Example1: x = 123, return 321
Example2: x = -123, return -321

Note:

The input is assumed to be a 32-bit signed integer. Your function should return 0 when the reversed integer overflows.

Submit Solution

class Solution(object):
    def reverse(self, x):
        """
        :type x: int
        :rtype: int
        """
        l = list(str(abs(x)))
        l.reverse()
        rst = int(''.join(l))
        if rst > 2147483647:
            return 0
        else:
            return rst if x>=0 else rst * (-1)