import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        try (Scanner sc = new Scanner(System.in);) {
            solve(sc);
        }
    }

    public static void solve(Scanner sc) {
        int a = sc.nextInt();
        int b = sc.nextInt();
        int c = sc.nextInt();
        int ab = Math.abs(a - b);
        int bc = Math.abs(b - c);
        int ca = Math.abs(c - a);
        int min = Math.min(a, b);
        min = Math.min(min, c);
        int max = Math.max(a, b);
        max = Math.max(max, c);

        if (min == a && max == b || min == b && max == a) {
            System.out.println(ca + bc);
        } else if (min == b && max == c || min == c && max == b) {
            System.out.println(ab + ca);
        } else if (min == c && max == a || min == a && max == c) {
            System.out.println(bc + ab);
        }
    }
}
/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