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

int MOD;

void EuclidExtins(int a, int b, int &d, int &x, int &y)
{
    if(b == 0)
    {
        x = 1, y = 0, d = a;
    }
    else
    {
        int x0, y0;
        EuclidExtins(b, a % b, d, x0, y0);
        x = y0;
        y = x0 - (a / b) * y0;
    }
}

int inversModular(int a)
{
    int d, x, y;
    EuclidExtins(a, MOD, d, x, y);
    while(x < 0) x += MOD;
    return x;
}

int main() {
    int n;
    f >> n >> MOD;
    g << inversModular(n);

    return 0;
}