Given a number N, swap the two nibbles in it and find the resulting number.

Example 1:
Input:
N = 100
Output:
70
Explanation:
100 in binary is 01100100,
two nibbles are (0110) and (0100)
If we swap the two nibbles, we get
01000110 which is 70 in decimal
Example 2:
Input:
N = 129
Output:
24
Explanation:
129 in binary is 10000001,
two nibbles are (1000) and (0001)
If we swap the two nibbles, we get
00011000 which is 24 in decimal
Your Task:
You don't need to read input or print anything. Your task is to complete the function swapNibbles() which takes an integer N as input parameters and returns an integer after swapping nibbles in the binary representation of N.

Expected Time Complexity: O(1)
Expected Space Complexity: O(1)

Constraints:
0 ≤ N ≤ 255

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