import java.util.*;

class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String[] aaa = scanner.nextLine().split(" ", 3);

        int[] arr = new int[3];
        for (int i = 0; i < 3; i++) {
            arr[i] = Integer.parseInt(aaa[i]);
        }
        Arrays.sort(arr);

        System.out.println(arr[2] - arr[0]);
    }
}

/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