#include <iostream>
#include<cstdio>
#include<algorithm>
using namespace std;
int a[100000+100];
int main()
{
    int t;
    scanf("%d",&t);
    while(t--)
    {
        int k,n;
        scanf("%d%d",&n,&k);
        for(int i=1;i<=n-1;i++)
        {
            scanf("%d",&a[i]);
        }
        sort(a+1,a+n);
        long long sum=0;
        for(int i=1;i<=n-1-(k-1);i++)
        {
            sum+=(long long)a[i];
        }
        sum+=(long long )n;
        cout<<sum<<endl;
    }

}