#include <fstream>

using namespace std;

const int N = 100000;

int x[N+1], lung[N+1], val_min[N+1];

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

int caut_bin(int v[], int n, int x)
{
    int st = 1, dr = n, rez = 0;
    while (st <= dr)
    {
        int m = (st + dr) / 2;
        if (v[m] < x)
        {
            rez = m;
            st = m + 1;
        }
        else
        {
            dr = m - 1;
        }
    }
    return rez;
}

void refac_subsirul(int p, int val, int lg)
{
    if (lg == 1)
    {
        return;
    }
    if (x[p] < val && lung[p] == lg - 1)
    {
        refac_subsirul(p - 1, x[p], lung[p]);
        out << x[p] << " ";
    }
    else
    {
        refac_subsirul(p - 1, val, lg);
    }
}

int main()
{
    int n;
    in >> n;
    for (int i = 1; i <= n; i++)
    {
        in >> x[i];
    }
    int n_val_min = 0, pmax = 1;
    for (int i = 1; i <= n; i++)
    {
        int j0 = caut_bin(val_min, n_val_min, x[i]);
        if (j0 == n_val_min)
        {
            n_val_min++;
        }
        lung[i] = 1 + j0;
        val_min[lung[i]] = x[i];
        if (lung[i] > lung[pmax])
        {
            pmax = i;
        }
    }
    out << lung[pmax] << "\n";
    refac_subsirul(pmax, x[pmax] + 1, lung[pmax] + 1);
    in.close();
    out.close();
    return 0;
}