#include <fstream>
using namespace std;

ifstream f("scmax.in");
ofstream g("scmax.out");

int n,m,i,j,v[100001],l[100001],poz[100001],prim;

int main()
{
    f>>n;

    for(i=1;i<=n;++i)
        f>>v[i];

    for(i=n;i>=1;i--)
    {
        l[i]=1;
        poz[i]=0;
        for(j=i+1;j<=n;j++)
            if(v[i]<v[j] && l[i]<1+l[j])
            {
                l[i]=1+l[j];
                poz[i]=j;
            }
        if(m<l[i])
        {
            m=l[i];
            prim=i;
        }
    }

    g<<m<<'\n';

    for(i=prim;i>0;i=poz[i])
        g<<v[i]<<" ";

    return 0;
}