#include <bits/stdc++.h>
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int ind,l,n,a[100000],i,j,b[100000],c[100000];

void print(int q)
{
	if (c[q]==0)fout << a[q]<<" ";
	else  
	{
		print(c[q]);fout << a[q]<<" ";
	}
}

int main()
{
	fin >> n ;
	for (i=0;i<n;i++)
	{
		fin >> a[i];
		b[i]=1;
	}
	for (i=0;i<n;i++)
	{
		for (j=0;j<i;j++)
		{
			if (a[i]>a[j] && b[j]+1>b[i])
			{
				b[i]=b[j]+1;
				c[i]=j;
			}
			if (b[i]>l)
			{
				l=b[i];
				ind=i;
			}
		}
	}
	fout << l << "\n";
	print(ind);
	return 0;
}