#include<fstream>
using namespace std;
long long v[100001],l[100001],n,i,t,k,max1;
int main()
{
	ifstream f("scmax.in");
	ofstream g("scmax.out");
	f>>n;
	for(i=1;i<=n;i++)
		f>>v[i];
	l[n]=1;
	for(k=n-1;k>=1;k--)
	{
		max1=0;
		for(i=k+1;i<=n;i++)
			if(v[i]>v[k]&&l[i]>max1)
				max1=l[i];
			l[k]=1+max1;
	}
	max1=l[1];
	t=1;
	for(i=2;i<=n;i++)
		if(l[i]>max1)
		{
			max1=l[i];
			t=i;
		}
		g<<max1<<"\n"<<v[t]<<" ";
		for(i=t+1;i<=n;i++)
			if(v[i]>v[t]&&v[i]&&v[t]&&l[i]==max1-1)
			{
				g<<v[i]<<" ";
				max1--;
			}
			return 0;
}