#include<cstdio>
#include<vector>
using namespace std;
int N,v[1000005],best[1000005],t[1000005];
int maxim,pozitie;
vector <int> afis;
int main()
 {
	freopen("scmax.in","r",stdin);
	freopen("scmax.out","w",stdout);
	
	int i,j;
	scanf("%d",&N);
	
	for(i=1;i<=N;i++)
	{
		scanf("%d",&v[i]);
		for(j=i-1;j>=1;j--)
			if(v[i]>v[j] && best[i]<best[j]+1)
			{
				best[i]=best[j]+1;
				t[i]=j;
			}
		if(best[i]>maxim) maxim=best[i],pozitie=i;
	}
	
	printf("%d\n",maxim + 1);
	
	do
	{
		afis.push_back(v[pozitie]);
		pozitie=t[pozitie];
	}while(pozitie!=0);
	for(i=afis.size() -1;i>=0;i--) printf("%d ",afis[i]);
	printf("\n");
	return 0;
}