#include <fstream>
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int n,i,j,maxim,v[100001],w[100001],mid,p,u,nr,x,xp;

void drum(int poz){
    if (poz!=0)
    {
        drum(T[poz]);
        fout<<v[poz]<<" ";
    }
}

int main()
{
    fin>>n;
    for (i=1;i<=n;i++)
        fin>>v[i];
    w[1]=1;
    nr=1;
    for (i=2;i<=n;i++)
    {
        if (v[i]>v[w[nr]])
        {
            w[++nr]=i;
            T[i]=w[nr-1];
        }
        else
        {
            p=1;
            u=nr;
            while (p<=u)
            {
                mid=(p+u)/2;
                if (v[i]>v[w[mid]])
                    p=mid+1;
                else
                    u=mid-1;
            }
            if (v[i]>v[w[p-1]])
            {
                w[p]=i;
                T[i]=w[p-1];
            }
        }
    }
    fout<<nr<<"\n";
    drum(w[nr]);
    return 0;
}