#include <iostream>
#include <cmath>
using namespace std;
int main(){
	int a,b,s;	cin>>a>>b>>s;
	if(s==1) cout<<abs(a-s)+1;
	else if(abs(a-s)<=abs(b-s))	cout<<abs(a-s)+s;
	else 	cout<<abs(b-s)+s-1+abs(a-1)+1;
	cout<<endl;
	return 0;
}