#include <fstream>

using namespace std;
ifstream cin ("scmax.in");
ofstream cout ("scmax.out");
int v[100001],dp[100001];
int t[100001];
void drum(int u)
{
    if (u!=0)
    {
        drum(t[u]);
        cout<<v[u]<<" ";
    }
}
int main()
{
    int n;
    cin>>n;
    for (int i=1;i<=n;i++)
    {
        cin>>v[i];
    }
    int sol=0,u;
    for (int i=1;i<=n;i++)
    {
        int max1=0,p=0;
        for (int j=1;j<i;j++)
        {
            if (v[j]<v[i])
            {
                if (dp[j]>max1)
                {
                    max1=dp[j];
                    p=j;
                }
            }
        }
        dp[i]=1+max1;
        t[i]=p;
        if (max1==0)
            t[i]=0;
        if (dp[i]>sol)
        {
            sol=dp[i];
            u=i;
        }
    }
    cout<<sol<<'\n';
    drum(u);
    return 0;
}