#include<fstream>
using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");
long long v[100001],l[100001],n,i,k,max1,t;
int main()
{f>>n;
for(i=1;i<=n;i++)
    f>>v[i];
l[n]=1;
for(k=n-1;k>=1;k--)
    {max1=0;
      for(i=k+1;i<=n;i++)
        if(v[i]>v[k]&&l[i]>max1)
           max1=l[i];
        l[k]=max1+1;
    }
max1=l[1];
t=1;
  for(i=2;i<=n;i++)
   if(l[i]>max1)
      {
          max1=l[i];
          t=i;
      }
g<<max1<<'\n'<<v[t]<<" ";
  for(i=t+1;i<=n;i++)
    if(v[i]>v[t]&&l[i]==max1-1)
    {
        g<<v[i]<<" ";
        max1=max1-1;
    }
    return 0;
}