import java.util.*;
public 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 c12 = Math.abs(a1-a2);
    int c23 = Math.abs(a2-a3);
    int c31 = Math.abs(a3-a1);
    System.out.println(c12+c23+c31-Math.max(Math.max(c12, c23), c31));
  }
}
/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