func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n, a[100000], s = 0, nz = 0;     cin >> n;     for (int i = 0; i < n; i++) cin >> a[i];     sort(a, a + n);     for (int i = 0; i < n; i++) {       if (a[i] == a[i + 1] && a[i] != 0) s++;       if (a[i] == 0) nz++;     }     cout << n - s - nz << endl;     return 0;   }   