#include<fstream>
using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");
int n,a[100001],l[100001],lmax;
void dinamic()
{
    int max,i,j;
    l[n]=1;
    for (i=n-1;i>=1;i--)
    {
        max=0;
        for (j=i+1;j<=n;j++)
            if (l[j]>max && a[i]<=a[j])
                max=l[j];
        l[i]=max+1;

        if (lmax<l[i])
            lmax=l[i];
    }

}
int main()
{
    f>>n;
    for(int i=1;i<=n;i++)
        f>>a[i];
    dinamic();
    g<<lmax<<"\n";
    int p,pp;
    pp=0;
    p=1;
    do
    {
        while (l[p]!=lmax || a[pp]>a[p])
            p++;
        g<<a[p]<<" ";
        pp=p;

        lmax--;
    }while (lmax!=0);
    f.close();
    g.close();
    return 0;
}