1784A - Monsters (easy version) - CodeForces Solution

/* ALTXT */

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

#define ll long long
const int inf = 1e9 + 5;
const int64_t INF = 1e18 + 5;

void solve()
{
    int n, t;
    cin >> n;
    vector<int> a(n);
    for (int i = 0; i < n; i++)
    {
        cin >> a[i];
    }
    sort(a.begin(), a.end());
    ll ans = 0, c = 0;
    for (int i = 0; i < n; i++)
    {
        if (a[i] > c)
        {
            c++;
            ans += (a[i] - c);
        }
        // else
        // {
        // }
    }
    cout << ans << "\n";
}

signed main()
{
    ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);

    int Test = 1;
    cin >> Test;
    for (int T = 1; T <= Test; T++)
    {
        solve();
    }
    return 0;
}