#include <fstream>
using namespace std;
ifstream f("subsir.in");
ofstream g("subsir.out");
int n,i,j,l[100001],k,m;
long v[100001];
int main()
{
    f>>n;
    for(i=1;i<=n;i++)
        f>>v[i];
    l[n]=1;
    for(i=n-1;i>=1;i--)
    {
        m=0;
        for(j=i+1;j<=n;j++)
            if(v[i]<v[j]&&l[j]>m)
                m=l[j];
        l[i]=m+1;
    }
    m=l[1];
    k=1;
    for(i=1;i<=n;i++)
        if(m<l[i])
        {
            m=l[i];
            k=i;
        }
    g<<m<<"\n"<<v[k]<<" ";
    for(i=k+1;i<=n;i++)
        if(l[i]==m-1&&v[i]>v[k])
        {
            g<<v[i]<<" ";
            m=m-1;
        }
    return 0;
}