func_code_string: #include <bits/stdc++.h>   using namespace std;   int a[101][101];   int main() {     int n;     cin >> n;     int sum = 0;     for (int i = 1; i <= n; i++) {       for (int j = 1; j <= n; j++) {         cin >> a[i][j];         if ((i == j || i == (n - j + 1)) ||             (i == (n + 1) / 2 || j == (n + 1) / 2)) {           sum += a[i][j];         }       }     }     cout << sum;     return 0;   }   