#include <bits/stdc++.h>

using namespace std;
#define int long long

void solve() {
    int n;
    cin >> n;
    vector<int> a(n + 1);
    map<int, int> mp;

    for(int i = 1; i <= n; i++) {
        int x;
        cin >> x;
        mp[x] ++;
    }

    int sz = mp.size();
    int ans = 0;
    sz--;
    for(auto i: mp) {
        ans += i.second * sz;
        sz--;
    }

    cout << ans << '\n';
}

signed main() {
#ifdef ONLINE_JUDGE
#else
    freopen("in.txt", "r", stdin);
    freopen("out.txt", "w", stdout);
#endif
    int Tcase = 1;
    cin >> Tcase;
    while (Tcase--) {
        solve();
    }
    return 0;
}