#include<fstream>
using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");
int n,i,max1,a[1001],l[1001],k,t;
int main()
{
	f>>n;
	for(i=1;i<=n;i++)
		f>>a[i];
	l[n]=1;
	for(k=n-1;k>=1;k--)
	{
		max1=0;
		for(i=k+1;i<=n;i++)
			if(a[i]>a[k]&&l[i]>max1)
				max1=l[i];
		l[k]=1+max1;
	}
	max1=l[1];
	t=1;
	for(k=1;k<=n;k++)
		if(l[k]>max1)
		{
			max1=l[k];
			t=k;
		}
		g<<max1<<"\n";
		g<<a[t]<<" ";
		for(i=t+1;i<=n;i++)
			if(a[i]>a[t]&&l[i]==max1-1)
			{
				g<<a[i]<<" ";
				max1--;
			}
		return 0;
}