#include<stdio.h>
#include<iostream>
#define ll long long
using namespace std;


ll n,a;

ll getphi(ll num)
{
    int crt=num;
    for(ll i=2;i*i<=num;i++)
    {
        if(num%i==0)
        {
            while(num%i==0) num/=i;
            crt=(crt/i)*(i-1);
        }
    }
    if(num!=1) crt=crt/num*(num-1);
    return crt;
}

int main()
{
    freopen("inversmodular.in","r",stdin);
    freopen("inversmodular.out","w",stdout);
    scanf("%d%d",&a,&n);
    ll put=getphi(n)-1;
    ll sol=a;
    for(int i=0;(1<<i)<=put;i++)
    {
        if((1<<i)&put) sol=(sol*a)%n;
        a=(a*a)%n;
    }
    return 0;
}