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Maximum Weight Difference -MAXDIFF

Problem Link

#include <iostream>
#include <algorithm>

using namespace std;

int arr[101];
int main()
{
    int t, n, k;
    long sum1, sum2, res;
   
    cin >> t;
    while(t--)
    {
        cin >> n >> k;
        for(int i = 0; i < n; i++)
        {
            cin >> arr[i];
        }
       
        if(k > n / 2)
        {
            k = n - k;
        }
       
        sort(arr, arr + n);
        sum1 = sum2 = 0;
       
        for(int i = 0; i < k; i++)
        {
            sum1 += arr[i];
        }
       
        for(int i = k; i < n; i++)
        {
            sum2 += arr[i];
        }
       
        cout << sum2 - sum1 << endl;
       
    }
    return 0;
}

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