#include <fstream>
#define NMAX 100003
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int n,a[NMAX],len[NMAX];
int pd();
int main()
{
    int i,maxx;
    fin>>n;
    for(i=1;i<=n;i++)
        fin>>a[i];
    maxx=pd();
    fout<<maxx<<'\n';
    for(i=1;i<=n;i++)
    if(len[i]==maxx){fout<<a[i]<<" ";
    maxx--;}

}
int pd()
{
    int i,k,j,maxx=0;
    len[n]=1;
    for(i=n-1;i>=1;--i)
    {
        len[i]=1;
        for(j=i+1;j<=n;j++)
        if(a[i]<a[j]) len[i]=max(len[i],len[j]+1);
        if(maxx<len[i])
        maxx=len[i];
    }
    return maxx;
}