func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n;     cin >> n;     int arr[n];     for (int i = 0; i < n; i++) {       cin >> arr[i];     }     sort(arr, arr + n);     int ans = n;     if (arr[0] == 0) {       ans--;     }     for (int i = 1; i < n; i++) {       if (arr[i] == 0) {         ans--;       } else if (arr[i] == arr[i - 1]) {         ans--;       }     }     cout << ans << endl;   }   