#include <fstream>
using namespace std;
int n,v[100000],p[100000];
ifstream f("scmax.in");
ofstream g("scmax.out");
int main()
{
    int i,j,max=0,a;
    f>>n;
    for(i=1;i<=n;i++)
    f>>v[i];
    p[n]=1;
    for(i=n-1;i>=1;i--)
    {
        for(j=i+1;j<=n;j++)
            if(v[i]<v[j]&& p[i]<p[j])
               p[i]=p[j];
        p[i]++;
        if(p[i]>max)
        {
            max=p[i];
            a=i;
        }
    }
    g<<max;
    g<<endl;
    g<<v[a]<<" ";
    max--;
    while(max)
    {
        while(p[a]!=max)
            a++;
        g<<v[a]<<" ";
        max--;
    }
    return 0;
}