#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
long long v[100000], l[100000];
int i,n,poz[100000],ml,pl,j;
int main()
{
    fin>>n;
    for (i=1;i<=n;i++)
        fin>>v[i];
    l[n]=1; poz[n]=0;
    for (i=n-1;i>=1;i--)
    {
        ml=0;pl=0;
        for (j=i+1;j<=n;j++)
            if(l[j]>ml && v[i]<v[j])
                {
                    ml=l[j];
                    pl=j;
                }
        l[i]=1+ml; poz[i]=pl;
    }
    ml=0; pl=0;
    for (i=1;i<=n;i++)
        if (ml<l[i])
        {
            ml=l[i];
            pl=i;
        }
    fout<<ml<<'\n';
    for (i=pl;i!=0;i=poz[i])
        fout<<v[i]<<' ';
    fout.close();
    fin.close();
    return 0;
}