#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cmath>
#include <map>
#include <set>
#include <string>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;
#define ll long long
#define MOD 1000000007
const int N=100005;
int main()
{
    int t;
    scanf("%d",&t);
    while(t--)
    {
        int n,m;
        scanf("%d %d",&n,&m);
        int num[N]={0};
        for(int i=1;i<n;i++)
        {
            scanf("%d",&num[i]);
        }
        if(m>=n)
        {
            printf("%d\n",n);
            continue;
        }
        sort(num+1,num+n);
        ll sum=0;
        for(int i=1;i<n-m+1;i++)
        {
            sum=sum+(ll)num[i];
        }
        printf("%I64d\n",sum+(ll)n);
    }
    return 0;
}