#include <stdio.h>
#include <iostream>
#include <algorithm>
#include <string.h>
#include <vector>
using namespace std;

typedef long long ll;
//bool used[100005];
ll a[100005];
ll b[100005];
int main()
{
    int t,k,n;
    scanf("%d",&t);
    while(t--)
    {
        scanf("%d%d",&n,&k);
        ll ans=1;
        for(int i=0;i<n-1;i++){
            scanf("%I64d",a+i);
            ans+=a[i]+1;
            b[i]=a[i];
        }
        if(k>=n) printf("%d\n",n);
        else
        {
            sort(b,b+n-1);
            for(int i=0;i<k-1;i++)
                ans-=b[n-2-i];
            printf("%I64d\n",ans);
        }

    }
}