#include <fstream>

using namespace std;
ifstream cin("scmax.in");
ofstream cout("scmax.out");
int n,v[100005],d[100005],ant[100005],maxi,poz,p1,st,dr;
void f(int p)
{
    if(p!=0)
    {
        f(ant[p]);
        cout<<v[p]<<" ";
    }
}
int main()
{
    cin>>n;
    for(int i=1;i<=n;i++)
        cin>>v[i];
    maxi=1;
    d[1]=1;
    ///d[i]=indicele din vectorul v al celei mai mici valori in care se termina un sir de lungime i
    for(int i=2;i<=n;i++)
    {
         st=1;dr=maxi;
        while(st<=dr)
        {
            int mid=(st+dr)/2;
            if(v[i]<=v[d[mid]])
            {
                dr=mid-1;
            }
            else
                st=mid+1;
        }
        if(st>maxi)
        {
            maxi++;
            d[maxi]=i;
            ant[i]=d[st-1];
        }
        else
        {
            d[st]=i;
            ant[i]=d[st-1];
        }

    }
    cout<<maxi<<'\n';
    f(d[maxi]);
    return 0;
}