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 9.2.1) (judge verdict: Accepted)

#include<stdio.h>
int main(void)
{
	int a[4],b,i,j,x,y,z;
	for(i=0i;i<3;i++) a[i]=101;
	for(i=0;i<3;i++){
		scanf("%d",&a[i]);
	}
		for(j=0;j<2;j++){
			for(i=0;i<3;i++){
				if(a[i]>a[i+1]){
					b=a[i];
					a[i]=a[i+1];
					a[i+1]=b;
				}
			}
		}
		x=a[1]-a[0]; y=a[2]-a[1];
		z=x+y;
		printf("%d\n",z);
	return 0;
}