#include <fstream>
using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");
int i,j,l[100002],poz[100002],a[100002],maxim,pozmax,n;
int main()
{
    f>>n;
    for (i=1;i<=n;i++)
    {
        f>>a[i];
    }
    l[n]=1;
    poz[n]=-1;
    for (i=n-1;i>=1;i--)
    {
        //poz[i]=-1;
        //l[i]=1;
        for (l[i]=1, poz[i]=-1, j=i+1;j<=n;j++)
        {
            if (a[i]<a[j] && l[i]<1+l[j] )
            {
                l[i]=1+l[j];
                poz[i]=j;
            }
        }
    }
    maxim=l[1];
    pozmax=1;
    for (i=2;i<=n;i++)
    {
        if (l[i]>maxim)
        {
            maxim=l[i];
            pozmax=i;
        }
    }
    g<<maxim<<endl;
    for (i=pozmax; i!=-1; i=poz[i])
        g<<a[i]<<" ";
    f.close();
    g.close();
    return 0;
}