#include<iostream>
#include<fstream>
using namespace std;
	long a[100001],n,i,l[100001],poz[100001],j;
int main()
{

ifstream cin("scmax.in");
ofstream cout("scmax.out");
	cin>>n;
	for(i=1;i<=n;++i)
		
			
		{
	cin>>a[i];l[i]=1;}

	
	int maxim=-1,indice,a_de_i;
		
		for(i=n;i>=1;--i)
	{    a_de_i=a[i];
		for(j=n;j>i;--j)
		if(a_de_i<a[j]) 
		if (l[i]<l[j]+1)
			{
				l[i]=l[j]+1;
				poz[i]=j;
				
				}
			    if (maxim<l[i])
		          {
                    maxim=l[i];
		            indice=i;
                 	}
}

	

	// afisez scm
	cout<<maxim<<endl;
			
	while (indice!=0)
	{ cout<<a[indice]<<" ";
	 indice=poz[indice];
	 	}
	
	
	return 0;
}