#include <fstream>
using namespace std;

const string name("inversmodular");
ifstream cin(name + ".in");
ofstream cout(name + ".out");

void Euclid(long long a, long long b, long long &x, long long &y){
    if(!b)
        x = 1, y = 1;
    else{
        long long x1, y1;
        Euclid(b, a % b, x1, y1);
        x = y1;
        y = x1 - a / b * y1;
    }
}

int main(){

    long long a, n;
    cin >> a >> n;
    long long x, y;
    Euclid(a, n, x, y);
    cout << y;

    return 0;
}