#include <iostream>
#include <cstdio>
#include <cstring>
#include <algorithm>
using namespace std;
#define LL long long
LL a[100005];
int main()
{
//    freopen("in.txt","r",stdin);freopen("out.txt","w",stdout);
    int T;
    scanf("%d",&T);
    while (T--)
    {
        int i,n,k;LL ans=0;
        scanf("%d%d",&n,&k);
        for (i=1;i<=n-1;i++) scanf("%I64d",&a[i]);
        sort(a+1,a+n);ans=n;n-=k-1;
        for (i=n-1;i>=1;i--) ans+=a[i];
        printf("%I64d\n",ans);
    }
        
    return 0;
}