#include<stdio.h>
#include<string.h>
#include<algorithm>
using namespace std;
#define ll __int64
ll a[1000000];
int main()
{
    int t;
    scanf("%d",&t);
    while(t--)
    {
        ll n,k;
        memset(a,0,sizeof(a));
        scanf("%I64d%I64d",&n,&k);
        for(int i=0;i<n-1;i++)
        {
            scanf("%I64d",&a[i]);
        }
        if(k>=n)
        {
            printf("%I64d\n",n);
            continue;
        }
        ll tmp=k-1;
        ll output=0;
        sort(a,a+n-1);
        for(int i=n-2-tmp;i>=0;i--)
        {
            output+=a[i]+1;
        }
        output+=k;
        printf("%I64d\n",output);
    }
}