#include <iostream>
#include <fstream>
#define NMax 100001
using namespace std;
int a[NMax],l[NMax],poz[NMax];
int n,m,prim;

void Citire()
{
    ifstream g("scmax.in");
    g>>n;
    for(int i=1;i<=n;i++)
        g>>a[i];
}

void Subsir()
{
    int i,j;
    for(int 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 Afisare()
{
    ofstream f("scmax.out");
    f<<m<<endl;
    for(int i=prim;i>0;i=poz[i])
        f<<a[i]<<' ';
}

int main()
{
    Citire();
    Subsir();
    Afisare();

}