func_code_string: #include <bits/stdc++.h>   using namespace std;   bool a[200087];   int main(void) {     int n;     cin >> n;     for (int i = 0; i < n; i++) {       int temp;       cin >> temp;       a[temp + 100000] = true;     }     int ans = 0;     for (int i = 0; i <= 200000; i++) {       if (i != 100000 && a[i] == true) {         ans++;       }     }     cout << ans;     return 0;   }   