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