import java.util.Scanner;
public class Main
{   
	public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int x = sc.nextInt();
        int a = x/100%10;
        int b = x/10%10;
        int c = x%10;
        int y = a+b+c;
        int max = a;
        if(max<b) {
        	max=b;
        }
        if(max<c) {
        	max=c;
        }
        
        int min = a;
        if(min>b) {
        	min=b;
        }
        if(min>c) {
        	min=c;
        }
        
        System.out.print((max*100+min+(y-max-min)*10)-(min*100+max+(y-max-min)*10));
       
    }
}
/**************************************************************
	Problem: 1680
	User: admin
	Language: Java
	Result: Accepted
	Time:650 ms
	Memory:40348 kb
****************************************************************/