#include <iostream>
#include <fstream>

using namespace std;

void extended_euclid(int a, int n, int &x, int &y) {
    if (n == 0) {
        x = 1, y = 0;
        return;
    }

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

int main()
{
    FILE *fin, *fout;
    fin = fopen("inversmodular.in", "r");
    fout = fopen("inversmodular.out", "w");

    int a, n, x, y;
    fscanf(fin, "%d %d", &a, &n);

    extended_euclid(a, n, x, y);
    fprintf(fout, "%d\n", x);

    fclose(fin);
    fclose(fout);
    return 0;
}