#include<fstream>
using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");
int lmax[10000],a[10000],poz[10000],maxim,p,n,i,j;
int main(){
	f>>n;
	for(i=1;i<=n;++i)f>>a[i];
	lmax[n]=1;
	poz[n]=-1;
	maxim=1;
	p=n;
	for(i=n-1;i>=1;--i)
	{lmax[i]=1;poz[i]=-1;
	for(j=i+1;j<=n;++j)
		if(a[i]<a[j]&&lmax[i]<lmax[j]+1)
		{lmax[i]=lmax[j]+1;poz[i]=j;
		if(lmax[i]>maxim)maxim=lmax[i],p=i;
		}
	}
	g<<maxim<<"\n";
	i=p;
	while(i!=-1){g<<a[i]<<" ";i=poz[i];}
	g<<endl;
	return 0;
}