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>
#include<math.h>
int main()
{
	int a,b,c,d,e,min,f,n=0;
	while(scanf("%d%d%d",&a,&b,&c)!=EOF)
	{
		d=abs(a-b);
		e=abs(a-c);
		f=abs(b-c);
		if(d>=e&&d>=f)
		{
			min=e+f;
		}
		if(e>=d&&e>=f)
		{
			min=d+f;
		}
		if(f>=e&&f>=d)
		{
			min=e+d;
		}
		printf("%d\n",min);
	}
	return 0;
}