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

template<typename T>
void fin(T a){
  cout<<a<<endl;
  exit(0);
}
signed main(){
    int a,b,c;cin>>a>>b>>c;
    if(a>b&&a<c)cout<<min(a-b,c-a)<<endl;
    else if(a<b&&a>c)cout<<min(a-c,b-a)<<endl;
    swap(a,c);
    if(a>b&&a<c)cout<<min(a-b,c-a)<<endl;
    else if(a<b&&a>c)cout<<min(a-c,b-a)<<endl;
}