#include <fstream>

using namespace std;

ifstream in;
ofstream out;

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

    int x0,y0;
    euclid_extins(b,a%b,x0,y0);

    x=y0;
    y=x0-(a/b)*y0;
}

int main()
{
    int A,N,x,y;

    in.open("inversmodular.in");

    in>>A>>N;

    in.close();

    euclid_extins(A,N,x,y);

    out.open("inversmodular.out");

    out<<x<<'\n';

    out.close();

    return 0;
}