#include <iostream>
#include <fstream>
#include <cmath>
using namespace std;

int a, n, sol, m ;

int exp(int x,int p)
{
    if(p<0) return exp(1/x,-p);
    if(p==0) return 1;
    if(p==1) return x;
    if(p%2==0) return (exp((x*x)%n,p/2))%n;
    if(p%2) return (x%n*exp((x*x)%n,(p-1)/2))%n;
}

int main()
{
    ifstream fin("inversmodular.in");
    ofstream fout("inversmodular.out");
    fin>>a>>n;
    int m=sol=n;
    sol=n-1;

    sol=exp(a,sol-1)%n;
    fout << sol;
    return 0;
}