#include<fstream>
using namespace std;
long N,i,k,m,t,l[100001],v[100001];
int main()
{ifstream f("scmax.in");
ofstream g("scmax.out");
f>>N;
for(i=1;i<=N;i++)
	f>>v[i];
l[N]=1;
for(k=N-1;k>=1;k--)
{m=0;
for(i=k+1;i<=N;i++)
	if(v[i]>v[k] && l[i]>m)
		m=l[i];
	l[k]=1+m;}
m=l[1];
t=1;
for(i=1;i<=N;i++)
	if(l[i]>m)
	{m=l[i];
	t=i;}
	g<<m<<endl;
	g<<v[t]<<" ";
	for(i=t+1;i<=N;i++)
	if(v[i]>v[t] && l[i]==m-1)
		{g<<v[i]<<" ";
	m--;}
	f.close();
	g.close();
	return 0;}