#include <fstream>

using namespace std;

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

const int Nmax = 100003;

int n, k, nr, poz, maxim;
int v[Nmax], best[Nmax], p[Nmax], L[Nmax];

void afisare (int i)
{
    if (p[i] != 0)
        afisare (p[i]);
    out << v[i] << ' ';
}

int caut (int x)
{
    int p, u, m;
    p = 0; u = nr; m = (p + u) / 2;

    while (p <= u)
    {
        if (x > v[L[m]] && x <= v[L[m + 1]]) return m;
            else
        if (x > v[L[m + 1]])
        {
            p = m + 1;
            m = (p + u) / 2;
        }
            else
        {
            u = m - 1;
            m = (p + u) / 2;
        }
    }

    return nr;
}

int main()
{
    in >> n;

    for (int i = 1; i <= n; i++)
        in >> v[i];

    best[1] = 1;
    L[1] = 1;
    L[0] = 0;

    for (int i = 2; i <= n; i++)
    {
        poz = caut(v[i]);

        p[i] = L[poz];
        L[poz + 1] = i;
        best[i] = poz + 1;
        if (nr < poz + 1)
            nr = poz + 1;
    }

    poz = 0;

    for (int i = 1; i <= n; i++)
    {
        if (best[i] > maxim)
        {
            maxim = best[i];
            poz = i;
        }
    }

    out << maxim << '\n';

    afisare (poz);

    return 0;
}