#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <cstdio>
#include <cstring>
#include <ctime>
#include <string>
#include <vector>
#include <algorithm>
#include <cmath>
#include <sstream>
#include <utility>
using namespace std;
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef pair<int,int> pii;
#define all(c) (c).begin(), (c).end()
#define loop(i,a,b) for(ll i=a; i<ll(b); i++)
#define rep(i,b) loop(i,0,b)
#define each(e,c) for(auto&e:c)
#define pb push_back
#define eb emplace_back
#define mp make_pair
#define mt make_tuple
#define lb lower_bound
#define ub upper_bound
#ifdef DEBUG
#define dump(...) (cerr<<#__VA_ARGS__<<" = "<<(DUMP(),__VA_ARGS__).str()<<" ["<<__LINE__<<"]"<<endl)
struct DUMP:ostringstream{template<class T>DUMP &operator,(const T&t){if(this->tellp())*this<<", ";*this<<t;return *this;}};
#else
#define dump(...)
#endif
template<class T> ostream& operator<<(ostream& os, vector<T> const& v){
    rep(i,v.size()) os << v[i] << (i+1==v.size()?"":" ");
    return os;
}

int const inf = 1<<26;

int main(){
    int A,B,S;
    while(cin>>A>>B>>S){
        int ans;
        if(S!=1){
            if(abs(S-A) > abs(S-B)) throw "";
            int t1 = abs(S-A) > abs(S-B) ? abs(B-S)+abs(S-1)+A : inf; // S-b>1-a>0
            int t2 = abs(S-A) <= abs(S-B) ? abs(A-S)+S : inf; // S-a>0
            int t3 = abs(S-A) > abs(S-B) ? abs(S-B)+abs(B-A)+A : inf; // S-b>A-a>0
            dump(t1,t2,t3);
            ans = min({t1,t2,t3});
        } else {
            ans = abs(S-A) + 1;
        }
        cout << ans << endl;
    }
}