#include<fstream>
using namespace std;
int main()
{
	int x,max,i,j,n,a[100001],l[100001];
	fstream fi("scmax.in",ios::in);
	fstream fo("scmax.out",ios::out);
	fi>>n;
	for(i=1;i<=n;i++)
		fi>>a[i];
	l[n]=1;
	for(i=n-1;i>=1;i--)
		{
			l[i]=1;
			for(j=n;j>=i+1;j--)
			if((l[i]<l[j]+1)&&(a[j]>a[i])) l[i]=l[j]+1;
	    }
	max=-int(2e9);
	for(i=1;i<=n;i++)
		if(max<l[i]) max=l[i];
	fo<<max<<"\n";
	x=0;
	for(i=1;i<=n;i++)
		if((x<a[i])&(l[i]==max)){ fo<<a[i]<<" "; max--; x=a[i];}
		fo.close();
			
	return 0;
}