HackerEarth Easy Going (Very Easy) problem solution

#include <iostream>

using namespace std;

void input (int arr[], int n) {

    for (int i = 0; i < n; i++)

        cin >> arr[i];

}
 void sort (int a[], int s) {

    for (int i = 0; i < s - 1; i++) {

        for (int j = 0; j < s - i - 1; j++) {

            if (a[j] > a[j + 1]) {

                int temp = a[j];

                a[j] = a[j + 1];

                a[j + 1] = temp;

            }

        }

    }

}


 

int main()

{

    int n, m, t, arr[1000];

    cin >> t;

    

    for (int i = 0; i < t; i++) {

        cin >> n >> m;

        input (arr, n);

        sort (arr, n);

        int max = 0, min = 0, k = n - m;

        for (int j = 0; j < k; j++){

            max += arr[n - j - 1];

            min += arr[j];

        }

        cout << max - min << endl;

    }

    return 0;

}