#include <bits/stdc++.h>
#define rep(i,n) for(int i=0;i<(n);++i)
#define all(a) (a).begin(),(a).end()
#define dunk(a) cout << (a) << endl
using namespace std;
typedef long long ll;

signed int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	int a, b, s;
	cin >> a >> b >> s;

	int ans = 0;
	if (s == 1) {
		dunk(abs(a- 1) + 1);
		return 0;
	}
	if (abs(a - s) <= abs(b - s)) {
		ans += abs(a - s) + s;
	}
	else {
		ans += min(abs(b - s) + abs(s - 1) + abs(a - 1) + abs(1), abs(b - s) + abs(s - a) + abs(a));
	}

	dunk(ans);

	return 0;
}