#include<stdio.h>
FILE*f=fopen("scmax.in","r");
FILE*g=fopen("scmax.out","w");
int best[1003],a[1003], max,sol=0,poz[1003],p;
int n;
void read()
  {
   fscanf(f,"%d",&n);
   for(int i=1;i<=n;++i) fscanf(f,"%d",&a[i]);
  }
void dinamic()
  {
  int i,j;
  best[n]=1;
  poz[n]=-1;
  max=1; p=n;
  for(i=n-1;i>=1;--i)
   {
   best[i]=1;
   poz[i]=-1;
   for(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]>max) max=best[i],p=i;
         }
   }
  }
void constr()
  {
  int i;
  i=p;
  while(i!=-1)
   {
   fprintf(g,"%d ",a[i]);
   i=poz[i];
   }
  }
int main()
  {
  read();
  dinamic();
  fprintf(g,"%d\n",max);
  constr();
  return 0;
  }