#include <iostream>
#include <fstream>
#define INF 0x3f3f3f3f
#define NM 100010
using namespace std;

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

int n, v[NM], poz[NM], L[NM], maxx, pozmax;

void Read()
{
    f >> n;
    for(int i = 1; i <= n; ++i)
        f >> v[ i ];
}

void Solve()
{
    poz[n] = -1;
    L[n] = 1;
    for(int i = n - 1; i >= 1; --i)
    {
        poz[i] = -1, L[i] = 1;
        for(int j = i + 1; j <= n; ++j)
        {
            if(v[i] < v[j] && L[j] + 1 > L[i])
            {
                poz[i] = j;
                L[i] = L[j] + 1;

            }
        }
    }

}

void Show()
{
    pozmax = n;
    for(int i = 1; i <= n; ++i)
    {
        if(L[i] > maxx)
        {
            maxx = L[i];
            pozmax = i;
        }
    }
    int  i = pozmax;
    g << maxx << '\n';
    while(i != -1)
    {
        g << v[i] << ' ';
        i = poz[i];
    }
}

int main()
{
    Read();
    Solve();
    Show();
}