Problem:
Score : 100 points

Problem Statement

You have three tasks, all of which need to be completed.

First, you can complete any one task at cost 0.

Then, just after completing the i-th task, you can complete the j-th task at cost |A_j - A_i|.

Here, |x| denotes the absolute value of x.

Find the minimum total cost required to complete all the task.

Constraints

All values in input are integers.

1 \leq A_1, A_2, A_3 \leq 100

Input

Input is given from Standard Input in the following format:

A_1 A_2 A_3

Output

Print the minimum total cost required to complete all the task.

Sample Input 1

1 6 3

Sample Output 1

5

When the tasks are completed in the following order, the total cost will be 5, which is the minimum:

Complete the first task at cost 0.

Complete the third task at cost 2.

Complete the second task at cost 3.

Sample Input 2

11 5 5

Sample Output 2

6

Sample Input 3

100 100 100

Sample Output 3

0

Solution in Java8 (OpenJDK 1.8.0) (judge verdict: Accepted)

import java.util.*;
import java.io.*;

public class Main{
	public static void main(String[] args){

	Scanner stdIn = new Scanner(System.in);
	BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
	
	int a1 = stdIn.nextInt();
	int a2 = stdIn.nextInt();
	int a3 = stdIn.nextInt();

	int min = a1;
	int max = a1;

	if(min > a2)
		min = a2;
	if(min > a3)
		min = a3;

	if(max < a2)
		max = a2;
	if(max < a3)
		max = a3;

	int ans = max - min;
	System.out.println(ans);
		



	}
}