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