func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int64_t t, a[200005], n;     cin >> t;     while (t--) {       int64_t dem = 1;       cin >> n;       for (int i = 1; i <= n; i++) cin >> a[i];       sort(a + 1, a + n + 1);       for (int i = 1; i < n; i++) {         if (a[i] != a[i + 1]) dem++;       }       cout << dem << endl;     }   }   