#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("inversmodular.in");
ofstream fout("inversmodular.out");
long long a,MOD;
long long inv(long long a)
{
    long long s=1;
    int p=MOD-2;
    while(p)
    {
        if(p&1)
        {
            s=1LL*s*a;
            int cat=s/MOD;
            s-=cat*MOD;
        }
        a=1LL*a*a;
        int cat=a/MOD;
        a-=cat*MOD;
        p=p>>1;
    }
    return s;
}
int main()
{
    fin>>a>>MOD;
    fout<<inv(a);
    return 0;
}