func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n;     cin >> n;     int a[n];     vector<int> v(2 * n);     for (int i = 0; i < n; i++) {       cin >> a[i];     }     for (int i = 0; i < 2 * n; i++) {       if (i >= n) {         v[i] = a[i - n];       } else         v[i] = a[i];     }     int ans = 0, cnt = 0;     for (int i = 0; i < 2 * n; i++)       if (v[i] == 1) {         cnt++;         ans = max(ans, cnt);       } else         cnt = 0;     cout << ans;     return 0;   }   