#include <fstream>
using namespace std;
ifstream cin("inversmodular.in");
ofstream cout("inversmodular.out");
int slove(int x,int n,int a)
{
    int x2=a%n;
    if((n+1)%x2==0)
        return (n+1)/x2;
    return slove(x2,n,a);
}
int main()
{
    ios_base::sync_with_stdio(0);
    int n,a;
    cin>>n>>a;
    cout<<slove(a%n,n,a);
    return 0;
}