import java.io.*;

public class Person {
	// max # of people in database.
	private final static int maxN = 100;

	// folks[0..n] are people in database.
	private static Person[] folks = new Person[maxN];
	private static int n = 0;

	private String name;	// person's name.

	// relationships with other persons.
	private boolean male;	// person's maleness
	private Person mom;	// person's mother
	private Person dad;	// person's father
	private Person kid;	// person's youngest child
	private Person other;	// person's significant other
	private Person sibling; // person's next older sibling
        
	// Construct person named s of maleness m.  
	public Person(String s, boolean m) {
		name = s;
		male = m;

		// check if there are too many people in the database
		if ( n >= maxN )
			System.out.println("over limit");
		else {
			folks[n] = this;
			n++;
		}
	}

	// # of people in database.   
	public static int numberOfPeople() {
		return n;
	}
        
	// i-th person in database.
	public static Person intToPerson(int i) {
		if (i < 0 || i >= n)
			return null;
		else return folks[i];
	}
        
	// string representation of a person.
	public String toString() {
		String result;
		result = "name:"+ name;
		if (male)
			result = result + " sex:male";
		else 
			result = result + " sex:female";
		if (mom != null ) 
			result = result + " mom:" + mom.name;
		if (dad != null ) 
			result = result + " dad:" + dad.name;
		if (other != null)
			result = result + " other:" + other.name;
		result = result + " kids:";
		if (kid == null)
			result = result + " none";
		else {
			Person p = kid;
			while ( p != null ){
				result = result + " " + p.name;
				p = p.sibling;
			}
		}
		return result; 
	}
  
	// create a child of mom and dad with name s and maleness m.
	public static void child(Person mom, Person dad, String s, boolean m) {
		Person child = new Person(s, m);
		child.mom = mom;
		child.dad = dad;
		child.sibling = mom.kid;
		dad.kid = child;
		mom.kid = child;
	}

	// marry persons p1 and p2.
	public static void marry(Person p1, Person p2) {
		p1.other = p2;
		p2.other = p1;
	}
        
	// field accessors.
	public String name() { return name; }
        public boolean male() { return male; }
	public Person other() { return other; }
}