#include <iostream>
#include <fstream>

#define NR_OF_ELEMENTS 100005

using namespace std;

ifstream fin("scmax.in");
ofstream fout("scmax.out");

void Read(int &n, int a[])
{
    int i;
	fin >> n;
	for(i = 1; i <= n; ++ i)
	    fin >> a[i];
}

void Solve(int n, int a[])
{
	int i, dp[NR_OF_ELEMENTS], t[NR_OF_ELEMENTS], j, sol = 0, pz = 0;

	for(i = n - 1; i >= 1 ; -- i)
		for(j = i + 1; j <= n ; ++ j)
			if(a[i] < a[j])
				if(dp[i] < dp[j] + 1)
				{
				    dp[i] = dp[j] + 1;
					t[i] = j;
				}

	for(i = 1; i <= n; ++ i)
		if(sol < dp[i])
		{
		    sol = dp[i];
		    pz = i;
		}

	fout << sol + 1 << '\n';
	i = pz;
	while(i)
	{
	    fout << a[i] << ' ';
	    i = t[i];
	}
	fout << '\n';
}

int main()
{
    int a[NR_OF_ELEMENTS], n;
	Read(n, a);
	Solve(n, a);
	return 0;
}