#include <fstream>

using namespace std;

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

int n, k, poz, j;
int dp[100005], v[100005], a[100005], prev[100005], rasp[100005];

int bs(int val)
{
    int st = 1, dr = k, mij, rasp = 0;
    while (st <= dr)
    {
        mij = (st + dr) / 2;
        if (a[v[mij]]< val)
        {
            st = mij + 1;
            rasp = mij;
        }
        else
            dr = mij - 1;
    }
    return rasp;
}

int main()
{
    fin >> n;
    for (int i = 1; i <= n; ++i)
    {
        fin >> a[i];
        j = bs(a[i]);
        dp[i] = j + 1;
        if (j == k)
            v[++k] = i;
        else if (a[v[j + 1]] > a[i])
            v[j + 1] = i;
        prev[i] = v[j];
    }
    poz = v[k];
    k = 0;
    while(poz)
    {
        rasp[++k] = a[poz];
        poz = prev[poz];
    }
    fout << k << "\n";
    for (int i = k; i >= 0; i--)
        fout << rasp[i] << ' ';
    return 0;
}