#include <fstream>
#include <bitset>
#include <iostream>

using namespace std;

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

int a[100002], lis[100002], n;

int CautareBinara(int x, int dim)
{
    int st, dr, mij, poz;
    poz = -1;
    st = 1;
    dr = dim;
    while(st <= dr)
    {
        mij = (st + dr) / 2;
        if(lis[mij] > x)
        {
            dr = mij - 1;
            poz = mij;
        }
        else
            st = mij + 1;
    }
    return poz;
}

int main()
{
    int maxim, poz, k = 1;
    fin >> n;
    for(int i = 1; i <= n; i++)
        fin >> a[i];
    fin.close();
    lis[1] = a[1];
    for(int i = 2; i <= n; i++)
    {
        if(a[i] < lis[1])
            poz = 1;
        else
            if(a[i] > lis[k])
            {
                poz = k + 1;
                k++;
            }
        else
            poz = CautareBinara(a[i], k);
        if(lis[poz - 1] < a[i])
            lis[poz] = a[i];
    }
    fout << k << "\n";
    for(int i = 1; i <= k; i++)
        fout << lis[i] << " ";
    fout << "\n";
    fout.close();
    return 0;
}