#include <iostream>
#include <fstream>

using namespace std;

struct elem {
    int info;
    elem* kovi = NULL;
};

int main()
{
    ifstream in("scmax.in");
    int n;
    in >> n;
    elem v[n];
    for(int i = 0; i < n; i++)
    {
        in >> v[i].info;
    }
    int maxHossz[n]={};
    for(int i = n-1; i >= 0; i--)
    {
        int maxi = 1, maxihely = -1;
        for(int j = i+1; j < n; j++)
        {
            if(v[i].info < v[j].info && maxi < maxHossz[j])
            {
                maxi = maxHossz[j];
                maxihely = j;
            }
        }
        maxHossz[i] = maxi + 1;
        if(maxi > 1)
        {
            v[i].kovi = &v[maxihely];
        }
    }
    int maxi = 0;
    elem* maxihely = NULL;
    for(int i = 0; i<n; i++)
    {
        if(maxHossz[i] > maxi)
        {
            maxi = maxHossz[i];
            maxihely = &v[i];
        }
    }
    ofstream out("scmax.out");
    out << maxi << endl;
    while(maxihely)
    {
        out << maxihely->info << " ";
        maxihely = maxihely->kovi;
    }
    return 0;
}