import java.util.Arrays;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {

        Scanner input = new Scanner(System.in);

        int [] a = new int[3];

        for (int i = 0; i < 3; i++) {
            a[i] = input.nextInt();
        }

        Arrays.sort(a);

        System.out.println(Math.abs(a[0] - a[1]) + Math.abs(a[1] - a[2]));
    }
}

/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz