#include <iostream>
#include <fstream>
#include <algorithm>
#include <cstring>
#include <cmath>
#include <iomanip>
#include <climits>

using namespace std;

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

int v[100005], d[100005], prec[100005], rasp[100005];

int main()
{
    int n, lmax = 0, imax = 0;
    fin >> n;
    for (int i = 1; i <= n; i++)
        fin >> v[i];
    d[1] = 1;
    for (int i = 1; i <= n; i++)
    {
        int mare = 0, l = 0, jret = 0;
        for (int j = i - 1; j >= 1; j--)
            if (v[j] < v[i] && mare < d[j])
            {
                mare = d[j];
                prec[i] = j;
            }
        d[i] = mare + 1;
        if (d[i] > lmax)
        {
            lmax = d[i];
            imax = i;
        }
    }
    Fout << lmax << '\n';
    int k = 0;
    for (int i = imax; i >= 1; i = prec[i])
        rasp[++k] = v[i];
    for (int i = k; i >= 1; i--)
        fout << rasp[i] << ' ';
    fout << '\n';
    return 0;
}