Swap Kth Elements in an Array

Given an array ARR of size N, perform the operation to swap the Kth element from the beginning with the Kth element from the end of the array.

Example:

Input:

N = 5, K = 2
ARR = [1, 2, 3, 4, 5]

Output:

[1, 4, 3, 2, 5]

Explanation:

The element at the second position from the start (2) is swapped with the second element from the end (4).

Constraints:

• 1 <= T <= 5
• 1 <= K < N <= 5000
• Time Limit: 1 second