#include<iostream>
#include<stdio.h>
using namespace std;
long a[100001],poz[100001],l[100001],n,i,j,pozmax,a_de_i;
int main()
{
      freopen ("scmax.in","r",stdin);
      freopen ("scmax.out","w",stdout);
       long max=-int(2e9);
          scanf("%ld",&n);

        for(i=1;i<=n;i++)

           scanf("%ld ",&a[i]);
            
               
           l[n]=1;poz[n]=-1;
           for(i=n-1;i>=1;i--)
           {
                              a_de_i=a[i];
             l[i]=1;
             poz[i]=-1;
            for(j=i+1;j<=n;j++)
              if(a_de_i<a[j] &&l[i]<1+l[j])
                 {l[i]=l[j]+1;
			     poz[i]=j; 
		       	}
          
          /*if(l[i]>max)
          {
           max=l[i];
            pozmax=i;
          
          }*/
          }
          
//g<<max<<"\n"
		   for(i=1;i<=n;i++)
			     if (l[i]>max) {max=l[i];pozmax=i;}
printf("%ld\n",max );
		   
		for(i=pozmax;i!=-1;i=poz[i])
    //g<<a[i]<<" ";
	printf("%ld ",a[i]);
   
    return 0;

}