Description
Given a signed 32-bit integer x, return x with its digits reversed. If reversing x causes the value to go outside the signed 32-bit integer range [-231, 231 - 1], then return 0.
Assume the environment does not allow you to store 64-bit integers (signed or unsigned).
Example 1:
Input: x = 123 Output: 321
Example 2:
Input: x = -123 Output: -321
Example 3:
Input: x = 120 Output: 21
Constraints:
-231 <= x <= 231 - 1
Solution
Python
class Solution(object):
def reverse(self, x):
"""
:type x: int
:rtype: int
"""
n = cmp(x, 0) * int(str(abs(x))[::-1])
return n if n.bit_length() < 32 else 0