#include <bits/stdc++.h>

using namespace std;
int a[100005];
int poz[100005];
int sol[100005];
int n, k;

ofstream fout("scmax.out");

void Read()
{
    int i;
    ifstream fin("scmax.in");
    fin >> n;

    for(i = 1; i <= n; i++)
        fin >> a[i];
    fin.close();
}

void Form()
{
    int mx;
    int i, j;

    poz[1] = 1;

    for(i = 2; i <= n; i++)
    {
        mx = 0;
        for(j = i - 1; j >= 1; j--)
            if(a[j] < a[i] && mx < poz[j])
                mx = poz[j];

        poz[i] = mx + 1;
    }

    mx = -1;

    for(i = 1; i <= n; i++)
        mx = max(mx, poz[i]);

    fout << mx << "\n";

    for(i = n; i >= 1; i--)
    {
        if(poz[i] == mx)
        {
            mx--;
            sol[++k] = a[i];
        }
    }

    for(i = k; i >= 1; i--)
        fout << sol[i] << " ";
    fout.close();
}

int main()
{
    Read();
    Form();
    return 0;
}