#include <bits/stdc++.h>
using namespace std;

int lscmax, lmax, pozmax,elemmax, n, x, k, maxim, dp[100005];
int V[100005];
int From[100005];
vector <int> F;

void fast ()
{
    ios_base::sync_with_stdio(false);
    cin.tie();
}

int main()
{
    fast();
    freopen("scmax.in","r", stdin);
    freopen("scmax.out","w", stdout);

    cin >> n;

    for (int i=1; i<=n; i++)
    {
        cin >> x;
        V[i]=x;
    }

    /// cazul de baza
    dp[1]=1;

    for (int i=2; i<=n; i++)
    {
        maxim=0;
        for (int j=1; j<i; j++)
        {
            if (V[j]<V[i])
            {
                if (dp[j]>maxim)
                {
                    maxim =dp[j];
                    From[i]=j;
                }
            }
        }

        /// dp[i] cel mai lung subsir care se termina in elementul V[i]; incep dp[2]

        dp[i] = maxim + 1;

        if (dp[i]>lmax)
        {
            lmax=dp[i];
            pozmax=i;
        }
    }

    cout << lmax << endl;

    int curent = pozmax;

    while (curent!=0)
    {
        F.push_back(curent);
        curent=From[curent];
    }

    for (int i=(int)F.size()-1; i>=0; i--)
        cout << V[F[i]] << " ";

    return 0;
}