#include <iostream>
#include <algorithm>
#include <vector>
#include <fstream>

using namespace std;

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

void Lungime(vector<int>& nums)
{
    int n = nums.size();

    vector<int> dp(n);
    vector<int> AnsNr(n);
    int ans = 0;

    for (int i = 0; i < n; i++)
    {
        vector<int> SirActual;
        int MaxSmaller = 0;
        for (int j = 0; j < i; j++)
        {
            if (nums[j] < nums[i] && dp[j] > MaxSmaller)
            {
                MaxSmaller = dp[j];
                SirActual.push_back(nums[j]);
            }
        }
        SirActual.push_back(nums[i]);

        dp[i] = MaxSmaller + 1;
        if (dp[i] > ans)
        {
            ans = dp[i];
            AnsNr = SirActual;
        }
    }

    fout << ans << '\n';
    for (int x : AnsNr)
    {
        fout << x << ' ';
    }
}

int main()
{
    int n;
    fin >> n;

    vector<int> nr(n);
    for (int& x : nr)
    {
        fin >> x;
    }

    Lungime(nr);

}

/*

    v  : 24 12 15 15 19 
    dp :  1  1  2  2  3 

*/