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;
	}


}