#include<fstream>
using namespace std;

int v[100100],dp[100100],drum[100100],n,poz,maxim;
 
int main() {
	int i,j;
	ifstream in("scmax.in");
	ofstream out("scmax.out");
	in>>n;
	for(i=0;i<n;i++)
		in>>v[i];
	
	dp[n-1]=1;
	drum[n-1]=-1; 
	maxim=1,poz=n-1;
	
	for(i=n-2;i>=0;i--) 
	{
		dp[i]=1;
		drum[i]=-1;
		for(j=i+1;j<n;j++)
			if(v[i]<v[j])
				if(dp[i]<dp[j]+1)
					{
						dp[i]=dp[j]+1;
						drum[i]=j;
						if(dp[i]>maxim)
						maxim=dp[i],poz=i;
					}
	}

	out<<maxim<<'\n';
	while(poz!=-1)
		{
		out<<v[poz]<<" ";
		poz=drum[poz];
		}
	out<<'\n';
	in.close();
	out.close();
	return 0;
}