#include<fstream.h>

long long s[1001],a[1001],poz[1001],max,n,i,j,pozmax;
ofstream fout("scmax.out");
int main()
{	ifstream fin("scmax.in");
	fin>>n;
	for(i=1;i<=n;i++)fin>>s[i];
	a[n]=1;poz[n]=-1;
	for(i=n-1;i>0;i--)
		for(j=i+1;j<=n;j++)
		if(s[i]<s[j]&&a[i]<a[j]+1)
		{	a[i]=a[j]+1;poz[i]=j;}
	max=a[1];
	for(i=2;i<=n;i++)
		if(a[i]>max) {max=a[i];pozmax=i;}
	fout<<max<<'\n';
	i=pozmax;
	while(i!=-1)
	{	fout<<s[i]<<' ';
		i=poz[i];
	}
	return 0;
}