#include <fstream>
#define NMAX 100004

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

void citire();
void rezolvare();

int a[NMAX], n, lg[NMAX], poz[NMAX];

int main()
{
    citire();
    rezolvare();
    return 0;
}

void citire()
{
    int i;
    fin >> n;
    for (i = 1; i <= n; i++)
        fin >> a[i];
}

void rezolvare()
{
    int i, maxim = 0, incep, j;
    lg[n] = 1;
    poz[n] = 0;
    for (i = n - 1; i > 0; i--)
    {
        lg[i] = 1;
        poz[i] = 0;
        for (j = i + 1; j <= n; j++)
        {
            if (a[i] < a[j])
                if (1 + lg[j] > lg[i])
                {
                    lg[i] = 1 + lg[j];
                    poz[i] = j;
                }
        }
    }
    maxim = 0;
    for (i = 1; i <= n; i++)
        if (lg[i] > maxim)
        {
            maxim = lg[i];
            incep = i;
        }
    fout << maxim << '\n';
    i = incep;
    while (incep)
    {
        fout << a[incep] << ' ';
        incep = poz[incep];
    }
}