a,b=map(int,input().split())
flag=False
if (a%2)*(b%2)!=1:
    print("YES")
else:
    for i in range(3,min(a,b)+1,2):
        if a%i==0 and b%i==0:
            flag=True
            break
    if flag:
        print("YES")
    else:
        print("NO")