#include<fstream>
#define DM 100006
using namespace std;

ifstream fin("scmax.in");
ofstream fout("scmax.out");

int N,Max,BS;
int X[DM],Best[DM],Succ[DM];

int main()
{
    int i,j;

    fin>>N;

    for(i=1; i<=N; ++i)
        fin>>X[i];

    for(i=N; i>=1; --i)
    {
        for(j=i+1;j<=N;++j)
            if(X[i]<X[j])
            {
                if(Best[i]<Best[j])
                {
                    Best[i]=Best[j];
                    Succ[i]=j;
                }
            }
        Best[i]++;
    }

    for(i=1;i<=N;++i)
        if(Best[i]>Max)
        {
            Max=Best[i];
            BS=i;
        }

    fout<<Max<<"\n";

    i=BS;

    while(i)
    {
        fout<<X[i]<<" ";
        i=Succ[i];
    }

    fout<<"\n";

    fin.close();
    fout.close();
    return 0;
}