#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: linmiaoling
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/