func_code_string: #include <bits/stdc++.h>   using namespace std;   int n;   vector<int> V;   int solve() {     V.clear();     cin >> n;     for (int i = 0; i < n; ++i) {       int a;       cin >> a;       V.emplace_back(a);     }     sort(V.begin(), V.end());     V.erase(unique(V.begin(), V.end()), V.end());     return V.size();   }   int main() {     ios_base::sync_with_stdio(0);     cin.tie(0);     int t;     cin >> t;     while (t--) cout << solve() <<   n ;   }   