#include<fstream>
using namespace std;
int main()
{
    ifstream read("inversmodular.in");
    ofstream write("inversmodular.out");
    unsigned int a,n;
    read>>a>>n;
    unsigned int invers_mod = 1;
    for(unsigned int i = 1 ; i < n-1 ; ++i)
    {
        invers_mod = (invers_mod * a) % n;
    }
    write << invers_mod;
    // Mica Th. Fermat => a^(n-1) == 1 => inv == a^(n-2;
}