#include <fstream>
#define IN "scmax.in"
#define OUT "scmax.out"
#define DMAX 100005

using namespace std;

ifstream fin (IN);
ofstream fout (OUT);

int A[DMAX], Best[DMAX], poz[DMAX];
int n;

void citire()
{
    int i;

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

void Dinamica()
{
    int i, j, aux;

    j=1;
    Best[1]=A[1]; poz[1]=1;
    for (i=2; i<=n; i++)
    {
        if (A[i] <= Best[j]) ///cautare binara
        {
            aux=j;
            while (A[i]<Best[aux]) aux--;

            Best[aux+1]=A[i];
            poz[i]=aux+1;
        }
        else
        {
            j++;
            Best[j]=A[i];
            poz[i]=j;
        }
    }

}

void afisare()
{
    int i, maxim;
    maxim=poz[1];

    for (i=2; i<=n; i++)
        if (maxim<poz[i])
            maxim=poz[i];

    fout<<maxim<<'\n';

   for (i=1; i<=maxim; i++)
    fout<<Best[i]<<" ";

}

int main()
{
    citire();
    Dinamica();
    afisare();
    return 0;
}