#include <fstream>
#define ll long long
using namespace std;
ifstream f("inversmodular.in");
ofstream g("inversmodular.out");

ll A, N, invers, y;

ll euclidextins(ll a, ll b, ll &x, ll &y)
{
    if (!b) { x=1; y=0; return a; }
    ll x0, y0, d=euclidextins(b, a%b, x0, y0);
    x=y0; y=x0-(a/b)*y0;
    return d;
}

int main()
{
    f>>A>>N;
    euclidextins(A, N, invers, y);
    while (invers<0)
        invers+=N; g<<invers<<'\n';
    return 0;
}