#include<iostream>
#include<atcoder/math>
using namespace std;
long P,Q;
int main()
{
	cin>>P>>Q;
	long ans=0;
	{//L
		long q=atcoder::inv_mod(P,Q);
		long p=(P*q-1)/Q;
		ans+=p+q;
	}
	{//R
		long q=atcoder::inv_mod(Q,P);
		long p=(Q*q-1)/P;
		ans+=p+q;
	}
	cout<<ans<<endl;
}