#include <fstream>
using namespace std;
ifstream f("inversmodular.in");
ofstream g("inversmodular.out");
int A,N;
void Read()
{
    f>>A>>N;
}
void euclid(int a, int b, int *d, int *x, int *y)
{
    if (b == 0) {
        *d = a;
        *x = 1;
        *y = 0;
    } else {
        int x0, y0;
        euclid(b, a % b, d, &x0, &y0);
        *x = y0;
        *y = x0 - (a / b) * y0;
    }
}
void Solve()
{
    int x,y,d;
    euclid(A,N,&d,&x,&y);
    g<<x<<"\n";
}
int main()
{
    Read();
    Solve();
    return 0;
}