import java.util.*;
public class Main {
    public static void main(String [] args){
        Scanner sc = new Scanner(System.in);
        ArrayList<Integer> List = new ArrayList<>();
        ArrayList<Integer> OPT = new ArrayList<>();
        for(int i=0;i<3;i++)List.add(sc.nextInt());
        for(int i=0;i<2;i++){
            for(int j=i+1;j<3;j++){
                int opt=Math.abs(List.get(i)-List.get(j));
                OPT.add(opt);
            }
        }
        Collections.sort(OPT);
        System.out.println(OPT.get(0)+OPT.get(1));
    }
}

/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