#include <fstream>
#define NMAX 10001
using namespace std;
ifstream fin ("date.in");
ofstream fout ("date.out");
int n;
int a[NMAX], lg[NMAX], urm[NMAX];
void citire()
{
    int i;
    fin>>n;
    for (i=1;i<=n;i++)
        fin>>a[i];
}
void pd()
{
    int i,j,jmax,maxim;
    lg[n]=1;
    urm[n]=0;
    for (i=n-1;i>0;i--)
    {
        jmax=0;
        maxim=1;
        for (j=i+1;j<=n;j++)
            if (a[i]<a[j] && 1+lg[j]>maxim)
            {
                maxim=1+lg[j];
                jmax=j;
            }
        lg[i]=maxim;
        urm[i]=jmax;
    }
}
void afisare()
{
    int i,lgmax,imax=1;
    lgmax=lg[1];
    for (i=2;i<=n;i++)
        if (lgmax<lg[i])
        {
            lgmax=lg[i];
            imax=i;
        }
    fout<<lgmax<<'\n';
    for (i=imax; i ;i=urm[i])
        fout<<a[i]<<' ';
    fout<<'\n';
    fout.close();
}
int main()
{
    citire();
    pd();
    afisare();
    return 0;
}