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 C (GCC 5.4.1) (judge verdict: Accepted)

#include<stdio.h>
int main()
{
    int a[3],sum=0,i,j,min;
    for(i=0;i<3;i++)
    scanf("%d",&a[i]);
    for(i=0;i<3;i++)
    {
        for(j=0;j<2;j++)
        {
            if(a[j]<a[j+1])
            {
                min=a[j];
                a[j]=a[j+1];
                a[j+1]=min;
            }
        }
    }
    sum=a[0]-a[1];
    sum=sum+(a[1]-a[2]);
    printf("%d",sum);
    return 0;
}