#include<fstream>
#define nmax 100009
using namespace std;

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

int N, b[nmax], v[nmax], t[nmax],sol, ind =1;

int bs(int val)
{
    int st = 0, dr = sol, m ;
    for(; st<=dr ; )
    {
        m =(st+dr)/2;
        if(m ==dr || (v[b[m + 1]] >= val && v[b[m]] < val))
            return m;
        if(v[b[m]] < val)
            st= m + 1;
        else
        dr = m - 1;
    }
    return 0;
}
void print(int x)
{
    if(t[x])
    print(t[x]);
    fout <<v[x] <<" ";
}
int secvmax()
{
    b[1] = 1;
    for(int i = 2; i <= N ;i++)
    {
        int poz = bs(v[i]);
        t[i] = b[poz];
        b[poz + 1] = i;
        if(sol < poz + 1)
        {
            sol = poz + 1;
            ind = i;
        }
    }
    fout <<sol <<'\n';
    print(ind);
}

void read()
{
    fin >> N;
    for(int i = 1; i <= N ;i++)
        fin >> v[i];
    sol = 1;
    secvmax();

}

int main()
{
    read();
    fin.close();
    return 0;
}