#include <iostream>
#include <fstream>

using namespace std;

ifstream fin ("scmax.in");
ofstream fout ("scmax.out");

int v[100001], o[100001], l[100001];

int main()
{
    int n, i, p, u, mij, k, aux, aux2;
    bool ok;

    fin>>n;

    for(i=1; i<=n; i++)
    {
        fin>>v[i];
    }

    k=0;

    for(i=1; i<=n; i++)
    {
        p=1;
        u=k;
        ok=0;

        while(p<=u && ok==0)
        {
            mij=(p+u)/2;
            if(v[i]<=o[mij] && v[i]>o[mij-1]) ok=1;
            else
            {
                if(v[i]>o[mij]) p=mij+1;
                else u=mij-1;
            }
        }


        if(ok==0)
        {
            k++;
            o[k]=v[i];
            l[i]=k;

            aux=i;
        }

        else
        {
            o[mij]=v[i];
            l[i]=mij;
        }
    }

    fout<<k<<"\n";

    aux2=l[aux];

    k=0;
    for(i=aux; i>=1 && aux2>0; i--)
    {
        if(l[i]==aux2)
        {
            k++;
            o[k]=v[i];

            aux2--;
        }
    }

    for(i=k; i>=1; i--)
    {
        fout<<o[i]<<' ';
    }

}