signed main()
{
	read(n);
	for (int i = 1; i <= n; i++) read(a[i]);
	for (int i = 1; i <= n; i++) read(b[i]);
	int maxx = -1,mini = 0x7f7f7f7f7f7f7f;
	for (int i = 1; i <= n; i++)
	{
		maxx = max(maxx,min(a[i],b[i]));
		mini = min(mini,max(a[i],b[i]));
	}
	writeln(abs(maxx - mini));
	return 0;
}

甚至不需要读 $m$ ，$a,b$ 错位都可以过