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

if n > m:
    n, m = m, n
if n == 1 and 1 <= m <= 2:
    print("YES")
elif n == 1:
    print("NO")
elif n % 2 == 1 and m % 2 == 1:
    print("NO")
else:
    print("YES")