#include <fstream>
using namespace std;
ifstream f ("subsir2.in");
ofstream g ("subsir2.out");
int n,k,v[5001],b[5001],c[5001],i,j,ma,nr,a;
int main()
{
    f>>n;
    ma=0;
    for(i=1;i<=n;++i)
    {
      f>>v[i];
    }
    for(i=n;i>=1;--i)
    {
        b[i]=1;
        for(j=i;j<=n;++j)
        {
            if(v[i]<v[j]){
                b[i]=b[j]+1;
                if(b[i]>ma)
                    break;
            }
        }
        if(b[i]>ma)
            ma=b[i];
    }
    g<<ma<<'\n';
    for(i=1;i<=n;++i)
    {
        a=i;
        if(b[i]==ma)
        {
            for(j=i+1;j<=n;++j)
                if(b[i]==b[j]+1)
                a=j-1;
            ma--;
            g<<v[i]<<" ";
        }
        i=a;
    }
    return 0;
}