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