func_code_string: #include <bits/stdc++.h>   using namespace std;   const int MOD = 1000000007;   const int inf = 1 << 30;   int n, t;   int main() {     cin >> n;     int v;     set<int> s;     for (int i = 0; i < n; i++) {       cin >> v;       if (v != 0) s.insert(v);     }     int a = s.size();     if (a != 0)       cout << a << endl;     else       cout << 1 << endl;     return 0;   }   