n, m, c = map(int, input().split())
flag = False

if n == 1:
    if m == 2:
        flag = True
elif m == 1:
    if n == 2:
        flag = True
elif m % 2 == 0 or n % 2 == 0:
    flag = True

if flag:
    print("YES")
else:
    print("NO")