Given an array of integers, find anyone combination of four elements in the array whose sum is equal to a given value X.
For example,
Input: array = {10, 2, 3, 4, 5, 9, 7, 8}
X = 23
Output: 3 5 7 8
Sum of output is equal to 23,
i.e. 3 + 5 + 7 + 8 = 23.
Find four elements that sum to a given value _ Set 2 (n^2 Logn Solution): https://www.geeksforgeeks.org/find-four-elements-that-sum-to-a-given-value-set-2/