import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.Scanner;

public class Main{
    public static void main(String []args)
    {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b =sc.nextInt();
        int c =sc.nextInt();
        int x3=Math.abs(a-b);
        int x1= Math.abs(a-c);
        int x2= Math.abs(b-c);
        int total=x1+x2+x3;
        total = Math.abs(total-(Math.max(x3,Math.max(x2,x1))));
        System.out.println(total);

    }
}
/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