CHEFPARTY Tester

#include<bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<int, int> pii;

#define F first
#define S second

const int MAXN = 1e5 + 10;

int n, a[MAXN];

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    int te; cin >> te;
    while (te--){
        cin >> n;
        for (int i = 0; i < n; i++) cin >> a[i];
        sort(a, a + n);
        int cur = 0;
        for (int i = 0; i < n; i++)
            if (a[i] <= cur) cur++;
        cout << cur << "\n";
    }
    return 0;
}