"""
Given a 32-bit signed integer, reverse digits of an integer.
Example 1:
Input: 123
Output: 321
Example 2:
Input: -123
Output: -321
Example 3:
Input: 120
Output: 21
Note:
Assume we are dealing with an environment which could only store integers within the 32-bit signed integer range: [−231, 231 − 1]. For the purpose of this problem, assume that your function returns 0 when the reversed integer overflows.
"""
class Solution(object):
def reverse(self, x):
"""
:type x: int
:rtype: int
"""
sign = [1, -1][x < 0]
x_new = sign * int(str(abs(x))[::-1])
return x_new if -(2 ** 31) < x_new < (2 ** 31 - 1) else 0