#include <iostream>
#include <fstream>
#include <vector>
#include <string>
#include <stack>
#include <map>
#include <set>
#include <algorithm>
#include <iomanip>
#include <cmath>
using namespace std;

ifstream f("inversmodular.in");
ofstream g("inversmodular.out");

int A,N;

int elog(int a,int n)
    {
        int p=a,s;
        for (int i=0;i<30;++i)
            {
                if ((1<<i)&n)
                    s=1ll*(s+p)%n;
                p=1ll*a*a%n;
            }
        return s;
    }

int main()
{
    f>>A>>N;
    g<<elog(A,N);
    return 0;
}