func_code_string: #include <bits/stdc++.h>   int g[102][102];   int main() {     int n, t, sum = 0;     scanf( %d , &n);     t = n / 2;     for (int i = 0; i < n; ++i)       for (int j = 0; j < n; ++j) scanf( %d , &g[i][j]);     for (int i = 0; i < n; ++i)       sum += g[i][i] + g[i][n - i - 1] + g[t][i] + g[i][t];     sum -= 3 * g[t][t];     printf( %d n , sum);   }   