#include<fstream>
using namespace std;
int n,v[100000];
void cmlsc()
{
 int l[100000]={1},p[100000]={-1},i,j;
 l[n]=1;
 p[n]=-1;
 for(i=n-1;i>0;i--)
    {
     //l[i]=1;
     //p[i]=-1;
     for(j=i+1;j<=n;j++)
	if(v[i]<v[j]&&l[i]<l[j]+1)
	{
	 l[i]=l[j]+1;
	 p[i]=j;
	}
    }
 int max=-1,poz;
 for(i=1;i<=n;i++)
     if(l[i]>max){max=l[i];poz=i;}
 ofstream fout("scmax.out");
 fout<<l[poz]<<"\n";
 while(poz!=-1)
	{
	 fout<<v[poz]<<" ";
	 poz=p[poz];
	}
}
int main()
{
 ifstream fin("scmax.in");
 fin>>n;
 int i;
 for(i=1;i<=n;i++)
    fin>>v[i];
 fin.close();   
 cmlsc();
 return 0;
}