//Problema,folosind programare dinamica
#include <fstream>
using namespace std;
ifstream cin("scmax.in");
ofstream cout("scmax.out");
int best[100005],a[100005], Max,sol=0,poz[100005],p,n;
int main()
{
    cin>>n;
    int i, j;
    for(i=1;i<=n;i++)
        cin>>a[i];
    best[n]=1;
    poz[n]=-1;
    Max=1;
    p=n;
    for(i=n-1;i>=1;--i)
    {
        best[i]=1;
        poz[i]=-1;
        for(j=i+1;j<=n;++j)
        {
            if(a[i]<a[j]&&best[i]<best[j]+1)
            {
                best[i]=best[j]+1;
                poz[i]=j;
                if (best[i]>Max)
                {
                    Max=best[i];
                    p=i;
                }
            }
        }
    }
    cout<<Max<<"\n";
    int q;
    q=p;
    while(q!=-1)
    {
        cout<<a[q]<<" ";
        q=poz[q];
    }
    return 0;
}