#include<fstream>
using namespace std;
ifstream cin("scmax.in");
ofstream cout("scmax.out");
int p, n, i,j, maxim, l[100005], urm[100005];
long long a[100005];
int main()
{   
     cin>>n;
     maxim=1;
     urm[n]=-1;
     l[n]=1; p=n;
     for(i=1;i<=n;i++)
                      cin>>a[i];
     for(i=n;i>=1;i--)
       { urm[i]=-1;
         l[i]=1;
       for(j=n;j>i;j--)
          if(a[i]<a[j] && l[i]<l[j]+1)
             { l[i]=l[j]+1;
               urm[i]=j;
               if(l[i]>maxim)
                 maxim=l[i]; p=i; }}
    cout<<maxim<<"\n";
    i=p;
    while(i!=-1)
       {  cout<<a[i]<<" ";
          i=urm[i];}
          cout<<"\n";
    
    return 0;
}