#include <iostream>

int gcd(int a,int b)
{
    return (!b) ? a : gcd(b,a%b);
}

int main()
{
    int m,n;
    while(std::cin>>m>>n)
    {
        if(gcd(m,n)==1)
        std::cout<<"YES"<<std::endl;
        else
        std::cout<<"NO"<<std::endl;
    }
}