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.Arrays;import java.util.Scanner;public class Main{public static void main(String[] args){int output=0;Scanner scanner=new Scanner(System.in);String s=scanner.nextLine();scanner.close();String[] str=s.split(" ",0);int[] input=new int[str.length];for(int i=0;i<str.length;i++){input[i]=Integer.parseInt(str[i]);}Arrays.sort(input);for(int i=0;i<input.length-1;i++){output+=input[i+1]-input[i];}System.out.println(output);}}