public class test {
	  public static int removePerson(String person, int first, int last, String[] list) {
		  
		  if (first > last) { System.out.println("Person not found"); return -1; }
		  else { 
			  int mid = (first + last)/2;
			  int check = list[mid].compareTo(person);
			  if(check < 0)
				 return removePerson(person,mid+1,last,list);
			  if(check > 0)
				 return removePerson(person,first,mid-1,list);
			  else
				  return mid;
		  }
	  } // end removePerson
	  
	  public static void main(String[] args)
	  {
		  String[] test = {"A", "B", "C", "D"} ;
		  System.out.println(removePerson("A", 0, 3, test)) ;
		  System.out.println(removePerson("B", 0, 3, test)) ;
		  System.out.println(removePerson("C", 0, 3, test)) ;
		  System.out.println(removePerson("D", 0, 3, test)) ;
	  }
}

/*
Output:
0
1
2
3
*/