#include<fstream>
#include<iostream>

using namespace std;

#define MAX 100001

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

int a[MAX],l[MAX],poz[MAX];
int n,m,prim;

void citire()
{
    int i;

    fin>>n;

    for(i=1;i<=n;i++)
        fin>>a[i];
}

void subsir()
{
    int i,j;

    for(i=n;i>=1;i--)
    {
        l[i]=1;poz[i]=0;

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

void tipar()
{
    int i;

    g << m << endl;

    for(i = prim; i > 0; i = poz[i])

    g << a[i] << ' ';
}

int main()
{
    citire();
    subsir();
    tipar();
    fin.close();

    return 0;
}