Reverse Integer

Reverse Integer

Given a 32-bit signed integer, reverse digits of an integer.

Example

Input: 123
Output: 321
Input: -123
Output: -321
Input: 120
Output: 21

Note

Assume we are dealing with an environment which could only store integers within the 32-bit signed integer range: [−2^31, 2^31 − 1]. For the purpose of this problem, assume that your function returns 0 when the reversed integer overflows.

Solution

class Solution:
    def reverse(self, x):
        """
        :type x: int
        :rtype: int
        """
        if x>0:
            ret = int(str(x)[::-1])
        else:
            ret = -1 * int(str(-1 * x)[::-1])
        if ret < 2147483648 and ret >= -2147483648:
            return ret
        else:
            return 0