#include<fstream>
using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");
int n,v[1000001],ns,sol[1000000],p;
int main()
{
    f>>n;
    for(int i=1;i<=n;++i)
        f>>v[i];
    sol[n]=1; ns=1; p=n;
    for(int i=n-1;i>=1;--i)
    {
        int w=0;
        for(int j=i+1;j<=n;++j)
            if(sol[j]>w and v[j]>v[i]) w=sol[j];
        sol[i]=w+1;
        if(ns<w+1) {ns=w+1; p=i;}
    }
    g<<ns<<endl<<v[p]<<" ";
    int k=p;p++;ns--;
for(int i=p;i<=n;++i)
    {
    if(sol[i]==ns and v[i]>v[k])
        {
            g<<v[i]<<" ";k=i;ns--;
        }
    }
}