import java.util.*;
class Main {
    public static void main(String[] args) {
	Scanner sc = new Scanner(System.in);
	int a1 = sc.nextInt();
	int a2 = sc.nextInt();
	int a3 = sc.nextInt();
	int b1 = (int)(Math.abs(a1-a2));
	int b2 = (int)(Math.abs(a3-a2));
	int b3 = (int)(Math.abs(a1-a3));
	int max = Math.max(b1,Math.max(b2,b3));
	System.out.println(b1+b2+b3-max);

    }
}
/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