#include <stdio.h>
#include <algorithm>
#include <string>
#include <vector>
#include <map>
#include <stdlib.h>
#include <math.h>

#define ll __int64
#define ull unsigned long long
#define INF 99999999

using namespace std;

int n, m;
ll a[101000];

void getData() {
    scanf("%d%d", &n, &m);
    for (int i = 1; i <= n - 1; i++) scanf("%I64d", &a[i]);
}

void solve() {
    ll sum = 0;
    sort(a + 1, a + n);
    for (int i = 1; i <= n - m; i++) sum += a[i];
    sum += n;
    printf("%I64d\n", sum);
}

int main() {
    int t;
    scanf("%d", &t);
    while (t--) {
        getData();
        solve();
    }
    return 0;
}