#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("inversmodular.in");
ofstream fout("inversmodular.out");
int prim(long long a)
{
    int i;
    for(i=2; i*i<=a; i++)
        if(a%i==0)   return 0;
    return 1;
}
int main()
{
    long long a, n, b=1, i, exp, aa;
    fin >> a >> n;
    if(prim(n)==1)
    {
        exp=n-2; aa=a;
        while(exp>1)
        {
            if(exp%2==1)  b=(b*a)%n;
            a=(a*a)%n;
            exp=exp/2;
        }
        fout << (a*b)%n;
    }
    return 0;
}