#include <fstream>
#include <iostream>

using namespace std;

int main()
{
    ifstream cin("inversmodular.in");
    ofstream cout("inversmodular.out");

    int a, n;
    cin >> a >> n;
    int i;
    for (i = 2; a * i % n != 1; ++i);
    cout << i;
    return 0;
}