#include <bits/stdc++.h>
#define INF 2000000001
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int n, maxim = 0, k;
vector <int> v, p, l;
void Read()
{
    fin >> n;
    v.resize(n + 1);
    p.resize(n + 1);
    l.resize(n + 1);
    for (int i = 1; i <= n; ++i)
        fin >> v[i], l[i] = INF;
}
int cbin(int st, int dr, int x)
{
    int mid, poz;
    while (st <= dr)
    {
        mid = (st + dr) / 2;
        if (l[mid] >= x) poz = mid, dr = mid - 1;
        else st = mid + 1;
    }
    return poz;
}
void Solve()
{
    for (int i = 1; i <= n; ++i)
    {
        k = cbin(1, maxim + 1, v[i]);
        if (l[k] == INF)
            ++maxim;
        l[k] = v[i];
        p[i] = k;
    }
    fout << maxim << "\n";
}
void Reconst(int poz, int val)
{
    if (poz == 0 || val == 0) return;
    if (p[poz] == val)
    {
        Reconst(poz - 1, val - 1);
        fout << v[poz] << " ";
    }
    else
    {
        Reconst(poz - 1, val);
    }
}
int main()
{
    Read();
    Solve();
    Reconst(n, maxim);
    fin.close();
    fout.close();
    return 0;
}