#include <iostream>
#include <fstream>

using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
long long n,m,k,v[100005],i,j,l[100005],poz[100005];
int main()
{
    fin>>n;
    for(i=1;i<=n;i++)
        fin>>v[i];
        for(i=n;i>0;i--)
        {
            l[i]=1;poz[i]=0;
            for(j=i+1;j<=n;j++)
                if(v[i]<v[j]&&l[i]<1+l[j])
                {
                    l[i]=1+l[j];
                    poz[i]=j;
                }
                if(m<l[i]){m=l[i];k=i;}
        }
        fout<<m<<endl;
        for(i=k;i>0;i=poz[i])
            fout<<v[i]<<' ';

}