#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;  
   }