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