#include <bits/stdc++.h>
using namespace std;

int main() {
	int n,a,b,c;
	cin>>n;
	a = n / 100;
	b = n / 10 % 10;
	c = n % 10;
	
	if(a < b) swap(a,b);
	if(b < c) swap(b,c);
	if(a < b) swap(a,b);
	
	cout<<a*100+b*10+c - (c*100+b*10+a);
}

/**************************************************************
	Problem: 1680
	User: admin
	Language: C++
	Result: Accepted
	Time:16 ms
	Memory:2072 kb
****************************************************************/