#include<fstream>
#include<cstdio>
using namespace std;
long i,j,n,maxim,k,t;
long v[100001],l[100001];
int main()
{
	ifstream f("scmax.in");
	//ofstream g("scmax.out");
	freopen ("scmax.out","w",stdout);
	f>>n;
	for(i=1;i<=n;i++)
		f>>v[i];
	l[n]=1;
	for(k=n;k>=1;k--)
	{
		maxim=0;
		for(i=k+1;i<=n;i++)
			if(v[i]>v[k]&&l[i]>maxim)
				maxim=l[i];
			l[k]=1+maxim;
	}
	
/*	for(i=1;i<=n;i++)
		g<<l[i]<<" ";
	g<<"\n";
	for(i=1;i<=n;i++)
		g<<v[i]<<" ";
	g<<"\n";*/
	for(i=1;i<=n;i++)
		if(maxim<l[i])
		{
			maxim=l[i];
		    t=i;
		}
		//g<<maxim<<"\n";
		//g<<v[t]<<" ";
		printf("%d\n",maxim);
		printf("%d ",v[t]);
      for(i=t+1;i<=n;i++)
		  if(v[i]>v[t]&&l[i]==maxim-1)
		  {
			//  g<<v[i]<<" ";
			  printf("%d ",v[i]);
			  maxim--;
		  }
		  
				
	return 0;
}