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
Solution
class Solution:
def reverse(self, x: int) -> int:
x = str(x)
if x[0] == '-':
x = '-' + x[1:][::-1]
else:
x = x[::-1]
if int(x) not in range(-2**31, 2**31):
return 0
return int(x)