#include <fstream>

using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");
int n,i,v[100001],j,poz,lungime,l[100001],maxim;
int main()
{
    f>>n;
    for(i=1;i<=n;i++)f>>v[i];

    l[n]=1;
    for(i=n-1;i>=1;i--)
    {
        maxim=0;
     for(j=i+1;j<=n;j++)
     if(v[j]>v[i]&&l[j]>=maxim){maxim=l[j];}

     l[i]=maxim+1;
    }

maxim=0;
   for(i=1;i<=n;i++)
   if(l[i]>maxim){maxim=l[i];poz=i;}
    g<<maxim<<'\n';
    lungime=maxim;

   while(lungime>=1)
    {
    for(i=poz;i<=n;i++)
    if(l[i]==lungime&&v[i]>=v[poz]){g<<v[i]<<" ";poz=i;lungime--;break;}
    }

    return 0;
}