using namespace std;
int dx[] ={0,1,0,-1};
int dy[] ={1,0,-1,0};
int a[100][100];
int main()
{
    int n;
    cin >> n;
    int num = 1;
    int x,y;
    int f = 0;
    x = y = 1;
    while(num <= n*n)
    {
        a[x][y] =num++;
        x += dx[f];
        y += dy[f];
        if(x > n || y > n || x < 1 || y < 1 || a[x][y] != 0)
        {
            if(f == 0) x++ ,y--;
            else if(f == 1) x--,y--;
            else if(f == 2) x--,y++;
            else x++,y++;
            f++;
            f %= 4;
        }
    } 
    for(int i = 1; i <= n ; i++)
    {
        for(int j = 1 ; j <= n ; j++)
            cout << a[i][j] << " ";
        cout << endl;
    }
    return 0;
}