Hi, here's your problem today. This problem was recently asked by LinkedIn:

Write a function that reverses the digits a 32-bit signed integer, x. Assume that the environment can only store integers within the 32-bit signed integer range, [-2^31, 2^31 - 1]. The function returns 0 when the reversed integer overflows.

Example:
Input: 123
Output: 321

<pre lang=py>
class Solution:
  def reverse(self, x):
    # Fill this in.

print(Solution().reverse(123))
# 321
print(Solution().reverse(2**31))
# 0
</pre>