#include <iostream>
#include <fstream>

using namespace std;

ifstream f ("inversmodular.in");
ofstream g ("inversmodular.out");

int x,y,n,mod;

inline void euclidExtins(int a,int b,int &x,int &y)
{
    if(b == 0)
    {
        x = 1,y = 0;
        return;
    }

    int x0,y0; euclidExtins(b,a%b,x0,y0);
    x = y0;
    y = x0 - (a/b)*y0;
}

int main()
{
    f >> n >> mod;

    euclidExtins(n,mod,x,y);
    if(x < 0)
        x = x % mod + mod;

    g << x;
    return 0;
}