#include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     int x[3];     cin >> x[0] >> x[1] >> x[2];     sort(x, x + 3);     cout << (x[1] - x[0]) + (x[2] - x[1]) <<   n ;     ;     return 0;   }   