#include<fstream>
using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");
int a[100001],n,i,j,l[100001];
int main()
{
    f>>n;
    int max1=0;
    int indi=0;
    for(int i=1;i<=n;i++)
        f>>a[i];
    l[n]=1;
    for(int i=n-1;i>=1;i--)
        {
            for(int j=i+1;j<=n;j++)
                if(a[i]<a[j]&&l[j]>=l[i])
                l[i]=l[j]+1;
                if(l[i]>max1)
                {max1=l[i];
                indi=i;
                }
        }
        g<<max1<<"\n";
    for(int i=indi;i<=n;i++)
        if(l[i]==max1)
    {
        g<<a[i]<<" ";
        max1--;
    }
        return 0;
}