#include <iostream>
#include <fstream>
using namespace std;
ifstream in("scmax.in");
ofstream out("scmax.out");
int n, a[100001],scm[100001],maxim,sol[100001],ind;
int main()
{
    in>>n;
    for(int i=1;i<=n;i++)
    {
        in>>a[i];
        maxim=0;
        for(int j=1;j<i;j++)
        {
            if(scm[j]>maxim && a[i]>a[j])maxim=scm[j];
        }
        scm[i]=maxim+1;
    }
    maxim=0;
    for(int i=1;i<=n;i++)
    {
        maxim=max(maxim,scm[i]);
    }
    out<<maxim<<'\n';
    for(int i=n;i>0;i--)
    {
        if(scm[i]==maxim)
        {
            sol[++ind]=a[i];
            maxim--;
        }
    }
    for(int i=ind;i>=1;i--)
    {
        out<<sol[i]<<' ';
    }
    return 0;
}