#include<stdio.h>
#include<string.h>
#include<set>
#include<iostream>
using namespace std;
struct longlong{
    long long k;
    bool operator < (const longlong &rhs) const{
        return k>rhs.k;
    }
};
multiset<longlong> s;
int main()
{
    ios::sync_with_stdio(false);
    long t;
    cin>>t;
    while (t--)
    {             
        s.clear();                                                                 
        long long n,k;
        cin>>n>>k; 

        long long ans=n;
        for (long i=1;i<n;i++)
        {
            longlong p;
            cin>>p.k;
            s.insert(p);
            ans+=p.k;
        }
        long i=1;
        if (k>=n){
            cout<<n<<endl;
            continue;
        }
        for (multiset<longlong>::iterator it=s.begin();i<k;it++)
        {
            i++;
            ans-=it->k;
        }
        cout<<ans<<endl;
    }
    return 0;
}