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 - 11class Solution:
2 def reverse(self, x: int) -> int:
3 s = str(x)
4 if s[0] == '-':
5 a=int('-' + s[:0:-1])
6 return 0 if a<(-2**31) else a
7 else:
8 b=int(s[::-1])
9 return 0 if b>(2**31-1) else b