#include<iostream>
#include<cmath>
using namespace std;

int main() {
  int a, b, s;
  cin >> a >> b >> s;

  if(abs(a-s) <= abs(b-s)) {
    cout << s + abs(a-s);
  } else {
    cout << s + abs(b-s) + abs(a-s);
  }

  cout << endl;
  return 0;
}