#include<cstdio>
#include<cstring>
#include<algorithm>
#include<iostream>
#include<vector>
using namespace std;

const int mx=100006;
int d[mx];

int main()
{
    int t;
    scanf("%d",&t);
    while (t--)
    {
        int n,k;
        scanf("%d%d",&n,&k);
        for (int i=0;i<n-1;i++) scanf("%d",&d[i]);
        if (n<=k)
        {
            printf("%d\n",n);
            continue;
        }
        sort(d,d+n-1);
        long long ans=n;
        for (int i=0;i+k<n;i++) ans+=d[i];
        printf("%I64d\n",ans);
    }
}