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