1 #include 
     
       2 #include 
      
        3 using namespace std; 4 int main() { 5     int x[] = { 0, 1, 0, -1 }; 6     int y[] = { 1, 0, -1, 0 }; 7     int n; 8     int pos_x = 0; 9     int pos_y = 0;10     cin >> n;11     int counter = 1;12     vector
       
        
          > A(n, vector
         
          (n, 0));13     int i;14     for (i = n - 1; i > 0; i -= 2) {15         for (int k = 0; k < 4; k++) {16             for (int j = 0; j < i; j++) {17                 A[pos_x][pos_y] = counter;18                 counter++;19                 pos_x += x[k];20                 pos_y += y[k];21             }22         }23         pos_x++;24         pos_y++;25     }26     if (i == 0)27         A[pos_x][pos_y] = counter;28     for (int i = 0; i < n; i++) {29         for (int j = 0; j < n; j++) {30             cout << A[i][j] << "  ";31         }32         cout << endl;33     }34     return 0;35 }