#include <fstream>
#define NMax 100005
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int N,X[NMax],DP[NMax],Succ[NMax],Max,PMax;
void Read()
{
    fin>>N;
    for(int i=1;i<=N;i++)
        fin>>X[i];
}
void Solve()
{
    for(int i=N;i>=1;i--)
        {
        DP[i]=0;
        for(int j=i+1;j<=N;j++)
            if(X[i]<X[j]&&DP[i]<DP[j])
                {
                DP[i]=DP[j];
                Succ[i]=j;
                }
        DP[i]++;
        }

    for(int i=1;i<=N;i++)
        {
            if(DP[i]>Max)
                {
                Max=DP[i];
                PMax=i;
                }
        }

}

void Print()
{
    int i;
    fout<<Max<<"\n";
    i=PMax;
    while(i)
    {
        fout<<X[i]<<" ";
        i=Succ[i];
    }
}
int main()
{
    Read();
    Solve();
    Print();
    return 0;
}