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