#include <fstream>

using namespace std;

ifstream cin("inversmodular.in");
ofstream cout("inversmodular.out");
int M;
int mod(int  a, int b)
{
	long long p=1;
	while(b)
	{
		if(b%2==1)
			p=(1LL*((p%M)*(a%M)))%M;
		a=(1LL*(a%M)*(a%M))%M;
		b/=2;
	}
	return p;
}

void euclid(int a, int b, int &d, int &x, int &y) {
    if (b == 0) {
        d = a;
        x = 1;
        y = 0;
    } else {
        int x0, y0;
        euclid(b, a % b, d, x0, y0);
        x = y0;
        y = x0 - (a / b) * y0;
    }
}

int main()
{
    int n;
    int rasp,x1,x2;
    cin>>n>>M;
    euclid(n,M,x1,rasp,x2);
    if (rasp<0)
    	rasp+=M;
    cout<<rasp;
    //cout<<mod(n,rasp);
    return 0;
}