#include <fstream>
#include <vector>
#include <algorithm>

using namespace std;

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

const int max_size = 1e5 + 1, INF = 2e9 + 1;

int v[max_size], dp[max_size], poz[max_size];

int main ()
{
    int n, pozmx = 0;
    in >> n;
    for (int i = 1; i <= n; i++)
    {
        poz[i] = INF;
    }
    for (int i = 1; i <= n; i++)
    {
        in >> v[i];
        int st = 0, e = 0;
        while ((1 << (e + 1)) <= pozmx)
        {
            e++;
        }
        while (e >= 0)
        {
            if (st + (1 << e) <= pozmx && poz[st + (1 << e)] < v[i])
            {
                st += (1 << e);
            }
            e--;
        }
        dp[i] = st + 1;
        poz[dp[i]] = min(poz[dp[i]], v[i]);
        pozmx = max(pozmx, dp[i]);
    }
    out << pozmx << '\n';
    vector <int> ans;
    for (int i = n; i > 0; i--)
    {
        if (dp[i] == pozmx)
        {
            ans.push_back(v[i]);
            pozmx--;
        }
    }
    reverse(ans.begin(), ans.end());
    for (auto f : ans)
    {
        out << f << " ";
    }
    in.close();
    out.close();
    return 0;
}