#include <iostream>
#include <fstream>
#define nmax 100000
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int n,a[nmax+5],best[nmax+5],poz[nmax+5];
int main()
{
    int vmax=1,x=n;
    fin>>n;
    for(int i=1;i<=n;i++)
        fin>>a[i];
    best[n]=1;
    poz[n]=-1;
    for(int i=n-1;i>=1;--i)
   {
   best[i]=1;
   poz[i]=-1;
   for(int j=i+1;j<=n;++j)
       if(a[i]<a[j] && best[i]<best[j]+1)
         {
         best[i]=best[j]+1;
         poz[i]=j;
         if(best[i]>vmax) {vmax=best[i];x=i;}
         }
   }
   fout<<vmax<<"\n";
   int i=x;
   while(i!=-1)
   {
       fout<<a[i]<<" ";
       i=poz[i];
   }
    return 0;
}