Reverse Bits

Given a 32-bit unsigned integer n, return the integer obtained by reversing the bits of n.

Example 1:

Input: n = 00000010100101000001111010011100
Output: 964176192 (00111001011110000010100101000000)

Example 2:

Input: n = 11111111111111111111111111111101
Output: 3221225471 (10111111111111111111111111111111)

Constraints:

• The input must be a binary string of length 32