#include <bits/stdc++.h>
using namespace std;

#define FOR(i, a, b) for(int i = (a); i < (b); i++)
#define RFOR(i, a, b) for(int i = (a) - 1; i >= (b); i--)
#define SZ(a) int(a.size())
#define ALL(a) a.begin(), a.end()
#define PB push_back
#define MP make_pair
#define F first
#define S second

typedef long long LL;
typedef vector<int> VI;
typedef pair<int, int> PII;
typedef double db;

int main()
{
	ios::sync_with_stdio(0); 
	cin.tie(0);
	cout << fixed << setprecision(15);
	int z;
	cin >> z;
	while (z--)
	{
		int n;
		cin >> n;
		VI a(n);
		for (int& ai : a)
			cin >> ai;
		sort(ALL(a), greater());
		LL s = 0;
		FOR(i, 0, n)
		{
			s += max(0, a[i] - i);
		}
		cout << s << "\n";
	}
	return 0;
}