intstr=input()
intstr_s = intstr.split(" ")


boy_num = int(intstr_s[0])
lady_num = int(intstr_s[1])

if boy_num < lady_num:
	print("YES")
	print(int(lady_num-boy_num-1))
else:
	print("NO")
	print(int(boy_num-lady_num+1))