# -*- coding: utf-8 -*-



def main():

    a, b = list(map(int, input().split()))



    for c in range(1, 4):

        num = a * b * c

        if num % 2 == 1:

            print("Yes")

            exit()



    print("No")



if __name__ == "__main__":

    main()

a, b = list(map(int, input().split()))



for c in range(1, 4):

    if (a * b * c % 2) == 1:

        print("Yes")

        exit()



print("No")

# -*- coding: utf-8 -*-
def main():
    a, b = list(map(int, input().split()))
    for c in range(1, 4):
        num = a * b * c
        if num % 2 == 1:
            print("Yes")
            exit()
    print("No")


if __name__ == "__main__":
    main()

a, b = list(map(int, input().split()))
for c in range(1, 4):
    if (a * b * c % 2) == 1:
        print("Yes")
        exit()
print("No")

-# -*- coding: utf-8 -*- -def main(): -    a, b = list(map(int, input().split())) -    for c in range(1, 4): -        num = a * b * c -        if num % 2 == 1: -            print("Yes") -            exit() -    print("No") - - -if __name__ == "__main__": -    main() +a, b = list(map(int, input().split())) +for c in range(1, 4): +    if (a * b * c % 2) == 1: +        print("Yes") +        exit() +print("No")