a.cpp

#include<iostream>
using namespace std;

int a,b,c;

int not_odd(){
	a = (a+b)/2;
	b = (b+c)/2;
	c = (c+a)/2;

	if(a%2 ==0 || b%2==0 | c%2 ==0){
		return 1;
	}

	return 0;
}

int main()
{	
	cin>>a>>b>>c;

	int inc = 0;

	while(not_odd()){
		inc++;
	}

	cout<<inc;
	return 0;
}