func_code_string: #include <bits/stdc++.h>   using namespace std;   long long n, x, sum;   vector<long long> my, temp;   int main() {     ios::sync_with_stdio(0);     cin.tie();     cout.tie();     cin >> n;     for (long long i = 0; i < n; i++) {       cin >> x;       my.push_back(x);       temp.push_back(x);     }     for (long long i = 0; i < n; i++) my.push_back(temp[i]);     long long maxi = 0;     for (long long i = 0; i < my.size(); i++) {       if (my[i] == 1) {         sum++;         maxi = max(maxi, sum);       } else         sum = 0;     }     cout << maxi << endl;     return 0;   }   