#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <time.h>
#include <math.h>
#include <vector>
#include <map>
#include <set>
#include <stack>
#include <queue>
#include <string>
#include <iostream>
#include <algorithm>
using namespace std;

#define getmid(l,r) ((l) + ((r) - (l)) / 2)
#define MEM(a,b) memset(a,b,sizeof(a))
#define MP(a,b) make_pair(a,b)
#define PB push_back

typedef long long ll;
typedef pair<int,int> pii;
const double eps = 1e-8;
const int INF = (1 << 30) - 1;
const int MAXN = 100010;

int T,n,k;
int D[MAXN];

int main(){
    scanf("%d",&T);
    while(T--){
        scanf("%d%d",&n,&k);
        for(int i = 1; i < n; ++i){
            scanf("%d",&D[i]);
        }
        sort(D + 1,D + n);
        k--;
        ll ans = 0;
        for(int i = 1; i <= n - 1 - k; ++i){
            ans += D[i];
        }
        ans += n;
        printf("%I64d\n",ans);
    }
    return 0;
}