/*
subsir crescator maximal infoarena 
*/
#include<vector>
#include<string>
#include<string.h>
#include<algorithm>
#include<cstdio>
#include<fstream>
#include<iostream>
#include<ctime>
#include<set>
#include<map>
#include<cmath>

using namespace std;

#define LL long long
#define PII pair<int ,int>
#define PCI pair<char ,int>
#define VB vector <bool>
#define VI vector <int>
#define VC vector <char>
#define WI vector<VI>
#define WC vector<VC>
#define RS resize
#define X first
#define Y second

#define FORN(i,n) for(int i=0;i<n;++i)
#define FOR(i,a,b) for(int i=a;i<=b;++i)
#define FORD(i,a,b) for(int i=a;i>=b;--i)
#define REPEAT do
#define UNTIL(x) while((x))

#define IN_FILE "scmax.in"
#define OUT_FILE "scmax.out"
ifstream f(IN_FILE);
ofstream g(OUT_FILE);

//variables
VI a, b;
int n,lenghtMax,posLenghtMax;
//other functions
string genereareSir(int lenght, int pos)
{
	FORD(i, pos - 1, 0)
	{
		if (a[i] < a[pos] && b[i] == lenght - 1)
		{
			if (lenght == 2)
			{
				return to_string(a[i]);
			}
			return genereareSir(lenght - 1, i) + " " + to_string(a[i]);
		}
	}
	return "";
}
void reading()
{
	f >> n;
	a.RS(n);
	b.RS(n);
	FORN(i, n)
	{
		f >> a[i];
	}
	f.close();
}
void solving()
{
	FORN(i, n)
	{
		int maxiForAPos = 1;
		FORN(j, i)
		{
			if (a[i] > a[j])
			{
				if (b[j] >= maxiForAPos)
				{
					maxiForAPos = b[j] + 1;
				}
			}
		}
		b[i] = maxiForAPos;
		if (maxiForAPos > lenghtMax)
		{
			lenghtMax = maxiForAPos;
			posLenghtMax = i;
		}
	}
}
void write_data()
{
	g << lenghtMax<<"\n";
	g << genereareSir(lenghtMax, posLenghtMax)+" "+to_string(a[posLenghtMax]);
}
int main()
{
	reading();
	solving();
	write_data();
}