func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n, m;     cin >> n >> m;     for (int i = 0; i < n; ++i) {       for (int j = 0; j < m; ++j) {         if (i % 2 == 1) {           if (i % 4 == 1)             if (j == m - 1)               cout <<  # ;             else               cout <<  . ;           else if (j == 0)             cout <<  # ;           else             cout <<  . ;         } else           cout <<  # ;       }       cout << endl;     }   }   