#include<iostream>
#include<fstream>

using namespace std;

int main()
{
	int n,i,j,a[100000],MAXL,l[100000],u[100000],max=0,pozmax;	
	
ifstream fin("scmax.in");
ofstream fout("scmax.out");
	
	fin>>n;
	for(i=1;i<=n;i++) 
		fin>>a[i];
	
	for(i=1;i<=n;i++)
		u[i]=0;
	
	l[n]=1;
	for(i=n-1;i>=1;i--)
	{
		MAXL=0;
		for(j=i+1;j<=n;j++)
			if(a[i]<a[j] && l[j]>MAXL)						
			{
				MAXL=l[j];	
				u[i]=j;
			}		
		l[i]=MAXL+1;
		if(max<l[i])
		{
			max=l[i];
			pozmax=i;
		}
	}
	
	fout<<max<<'\n';
	for(i=pozmax;i!=0;i=u[i])
		fout<<a[i]<<' ';
	fin.close();
	fout.close();
	return 0;
}