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 Julia (0.5.0) (judge verdict: Accepted)

        function main()
          a = parse.(split(readline()))
          b = sort(a)
          l = length(b)
  		  m = 0
          sum = 0  
  		if l % 2 == 0
          	m=b[convert(Int, l/2)]
          else
            m=b[convert(Int, (l+1)/2)]
          end
  		  for i in 1:l
    		sum += abs(a[i]-m)
  end
  			print(sum)
        end
        main()