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: Wrong Answer)

#include <stdio.h>
#include <string.h>

void MakeCostMinimum(int p, int q, int r)
{
    int minimumcost = (q - p) + (r - q);

    if (minimumcost < 0)
        minimumcost = minimumcost * (-1);

    else
        ;

    printf("%d\n", minimumcost);
}

void Compare3Figures(int a, int b, int c)
{
    if (b < a && a < c)
    {
        int tmp = a;
        a = b;
        b = tmp;
    }

    else if (b < a && c < b)
    {
        int tmptwo = a;
        a = c;
        c = tmptwo;
    }

    else if (a < b && c < b && a < c)
    {
        int tmpthree = b;
        b = c;
        c = tmpthree;
    }

    else if (a <= b && c <= a)
    {
        int tmpfour = a;
        a = c;
        c = b;
        b = tmpfour;
    }

    else if (b <= a && b <= c && c <= a)
    {
        int tmpfive = a;
        a = b;
        b = c;
        c = tmpfive;
    }

    else if (a == c && a < b)
    {
        int tmpsix = b;
        b = c;
        c = tmpsix;
    }

    printf("%d, %d, %d\n", a, b, c);
    MakeCostMinimum(a, b, c);
}
int main(int argc, char *argv[])
{

    int A = 0;
    int B = 0;
    int C = 0;

    do
    {
        scanf("%d", &A);
    } while (A < 1 || 100 < A);

    do
    {
        scanf("%d", &B);
    } while (B < 1 || 100 < B);

    do
    {
        scanf("%d", &C);
    } while (C < 1 || 100 < C);

    Compare3Figures(A, B, C);
}