#include <fstream>
using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");

int N, a[100002], L[100002], sol;

int main()
{
    f>>N;
    for (int i=1; i<=N; ++i)
        f>>a[i];

    L[N]=1;
    for (int i=N-1; i; --i)
    {
        L[i]=1;
        for (int j=i+1; j<=N; ++j)
            if (a[i]<a[j] && L[j]+1>L[i])
            {
                L[i]=L[j]+1;
                if (L[i]>sol)
                    sol=L[i], prec=i;
            }
    }
    g<<sol<<'\n'<<a[prec]<<' ';
    for (int i=prec; i<=N; ++i)
        if (L[i]==L[prec]-1) g<<a[i]<<' ', prec=i;
    return 0;
}