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