import java.util.Scanner;

public class Scores
{
  public static void main(String args[])
  {
    final int MAXSIZE = 30;
    Scanner kb = new Scanner(System.in);
    double num, sum;
    int count;
    double scores[] = new double[MAXSIZE];
    double average;

    System.out.println("Enter a score (or -1.0 to quit):");
    num = kb.nextDouble();
    
    count = 0;
    sum = 0.0;
    while (num >= 0.0 && count < MAXSIZE)
    {
      sum = sum + num;
      scores[count] = num;
      count++;
      System.out.println("Enter a score (or -1.0 to quit):");
      num = kb.nextDouble();
    }

    average = sum / (double)count;

    for (int i = 0; i < count; i++)
    {
      System.out.println(scores[i] + " " + (scores[i] - average));
    }
  }
}