class PeopleFilterByAgeA
{
 Date myDate;

 public PeopleFilterByAgeA(Date d)
 {
  myDate=d;
 }

 public int oldFilter(Person [] a,int n)
 {
  int count=0;
  for(int i=0;i<n;i++)
     if(a[i].older(myDate))
        a[count++]=a[i];
  return count;
 }

 public int youngFilter(Person [] a,int n)
 {
  int count=0;
  for(int i=0;i<n;i++)
     if(!a[i].older(myDate))
        a[count++]=a[i];
  return count;
 }

}