#include <fstream>

using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");
int n,t;
int v[100003];
int p[100003];
int c[100003];
void cs()
{
    int i,j,m,k,m1=0;
    for(j=n;j>=1;j--)
    {
        m=1;
        k=0;
        for(i=j+1;i<=n;i++)
            if(v[j]<v[i] and m<=p[i])
            {
                m=p[i]+1;
                k=i;
            }
        p[j]=m;
        c[j]=k;
        if(m1<p[j])
        {
            m1=p[j];
            t=j;
        }
    }
    g<<m1<<'\n';
}
void cc()
{
    int i,j;
   i=t;
    while(c[i]!=0)
    {
        g<<v[i]<<" ";
        i=c[i];
    }
    g<<v[i]<<" ";
}
int main()
{
    f>>n;
    for(int i=1;i<=n;i++)
        f>>v[i];
    cs();
    cc();
    return 0;
}