/**
 *   @FileName	a.cpp
 *   @Author	kanpurin
 *   @Created	2022.05.14 19:52:20
**/

#include "bits/stdc++.h" 
using namespace std; 
typedef long long ll;


template<typename T>
T extgcd(T a, T b, T &x, T &y) {
    if (b == 0) {
        x = 1;
        y = 0;
        return a;
    }
    T d = extgcd(b, a%b, y, x);
    y -= a / b * x;
    return d;
}

ll solveL(int p,int q) {
    int x,y;
    int g = extgcd(p,-q,x,y);
    if (g < 0) x = -x, y = -y;
    if (x < 0 || y < 0) x += q, y += p;
    return x+y;
}

ll solveR(int p,int q) {
    int x,y;
    int g = extgcd(-p,q,x,y);
    if (g < 0) x = -x, y = -y;
    if (x < 0 || y < 0) x += q, y += p;
    return x+y;
}

int main() {
    int p,q;cin >> p >> q;
    cout << solveL(p,q) + solveR(p,q) << endl;
    return 0;
}