#include <iostream>
#include <cstdio>
#include<algorithm>
#include <cstring>
#include <string>
#include <cmath>
using namespace std;
typedef long long ll;
int d[100010],n;
int main()
{
    int T;
    scanf("%d",&T);
    while(T--)
    {
        ll sum;
        int m;
        scanf("%d%d",&n,&m);
        sum=n;
        for(int i=0;i<n-1;i++)
        {
            scanf("%d",&d[i]);
            sum+=d[i];
        }
        sort(d,d+n-1);
        for(int i=1;i<m&&i<n;i++)
            sum-=d[n-1-i];
        printf("%I64d\n",sum);
    }
    return 0;
}