#include<fstream>
#include<iostream>
using namespace std;
int a[100000],poz[100000],l[100000];
int main()
{
    long n,i, j,max,k, pozmax;
  ifstream f("scmax.in");
    f>>n;
  for(i=1;i<=n;i++)
    f>>a[i];
    f.close();
    l[n]=1;poz[n]=-1;
  max=1;pozmax=-1;
  for(i=n-1;i>=1;i--)
      {l[i]=1;poz[i]=-1;
      for(j=i+1;j<=n;j++)
       if(a[i]<a[j]&&l[i]<=l[j])
        { 
         l[i]=l[j]+1;
          poz[i]=j;
         if(l[i]>max)
           {max=l[i];pozmax=i;}
      
          }}
          

        
  ofstream g("scmax.out");
           g<<max<<endl;
        
for(i=pozmax;i!=-1;i=poz[i])
   g<<a[i]<<" ";
    g.close();
    return 0;
}