#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int pred[100001],v[100001],lung[100001],n;
void sir(int p)
{
    if(pred[p]!=0)
        sir(pred[p]);
    fout<<v[p]<<" ";
}
int main()
{
    int i,pmax,j;
    fin>>n;
    lung[1]=1;
    pred[1]=0;
    pmax=1;
    for(i=1;i<=n;i++)
        fin>>v[i];
    for(i=2;i<=n;i++)
    {
        lung[i]=0;
        for(j=1;j<i;j++)
            if(v[j]<v[i])
                if(lung[j]>lung[i])
                {
                    lung[i]=lung[j];
                    pred[i]=j;
                }
            lung[i]++;
            if(lung[i]>lung[pmax])
                pmax=i;
    }
    fout<<lung[pmax]<<'\n';
    sir(pmax);
    return 0;
}