#include<fstream>
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int a[100009],N,i,j,b[100009],c[100009],Lmax,p;
int main()
{
    fin>>N;
    for(i=1;i<=N;i++)
    {
        fin>>a[i];
    }
    for(i=N;1<=i;i--)
    {
        Lmax=0;
        p=0;
        for(j=i+1;j<=N;j++)
        {
            if(a[i]<a[j]&&b[j]>Lmax)
            {
                Lmax=b[j];
                p=j;
            }
            b[i]=1+Lmax;
            c[i]=p;
        }
    }
    Lmax=b[1];
    p=1;
    for(i=2;i<=N;i++)
    {
        if(b[i]>Lmax)
        {
            Lmax=b[i];
            p=i;
        }
    }
    fout<<Lmax<<"\n";
    for(i=p;i!=0;i=c[i])
    {
        fout<<a[i]<<" ";
    }
    fin.close();
    fout.close();
    return 0;
}