#include <iostream>
#include <fstream>
using namespace std;
int a[10000],n,mx[10000],ord[10000];
ifstream in ("scmax.in");
ofstream out ("scmax.out");
int main()
{
    int i;
    in>>n;
    for(i=1; i<=n; i++)
        in>>a[i];
    i=n;
    mx[i]=1;
    ord[i]=n;
    for(i=n-1; i>0; i--)
    {
        mx[i]=1; ord[i]=i;
        for(int j=i+1; j<=n; j++)
        {
            if(a[j]>a[i]&&mx[i]<=mx[j])
            {
                mx[i]=1+mx[j];
                ord[i]=j;
            }
        }
    }
    int mxi=-1,k;
    for(i=1; i<=n; i++)
        if(mxi<mx[i])
    {
        mxi=mx[i];
        k=i;
    }
    out<<mx[k]<<"\n";

    int j=k;
    for(i=1; i<=mxi; i++)
    {
        out<<a[j]<<" ";
        j=ord[j];
    }


    return 0;
}