#include<fstream>
#include<iostream>
#include<vector>
#include<stack>
#include<iterator>

using namespace std;

int main()
{
	fstream fin("scmax.in", fstream::in);
	fstream fout("scmax.out", fstream::out);
	
	int n;
	long x;
	vector<long> v,smax,bst,pre;
	vector<long>::iterator it;
	fin>>n;
	pre.resize(n);
	smax.resize(n);
	bst.resize(n);
	for(int i=0; i<n; ++i)
	{
		fin>>x;
		v.push_back(x);
		//cout<<v[i]<<" ";
	}
	
	for(int i=0; i<n; ++i)
	{
		it=smax.begin();
		int j=0;
		while(it!=smax.end() && v[*it]<v[i])
		{
			j++;
			it++;
		}
		smax[j]=i;
		bst[i]=j;
		if(j>0)
			pre[i]=smax[j-1];
		else
			pre[i]=-1;
	}
	//cout<<"\n";

	int max=0,pos;
	for(int i=0; i<n; ++i)
	{
		if(bst[i]>max)
		{
			max=bst[i];
			pos=i;
		}
	}
	fout<<max+1<<"\n";
	stack<long> st;
	while(pos!=-1)
	{
		st.push(v[pos]);
		pos=pre[pos];
	}
	while(!st.empty())
	{
		fout<<st.top()<<" ";
		st.pop();
	}
	//fout<<"\n";
	fin.close();
	fout.close();
	return 0;
}