public class List2
{	private final int MAX = 50;
	private String[] name;
	private int[] score;
	private int length;
	public List2()
	{	length = 0;
		name = new String[MAX];
		score = new int[MAX];
	}
	public void insert(String n, int s)
	{	name[length] = n;
		score[length] = s;
		length ++;
	}
	public double average()
	{	int sum = 0;
		for(int i=0; i<length; i++)
			sum += score[i];
		return (double)sum / length;
	}
	public void print()
	{	for(int i=0; i<length; i++)
			System.out.println(name[i] + " " + score[i]);
	}
}