def check(n, m, c):
    if n > m:
        n, m = m, n

    ### 以下 n < m ###
    if n == 1 and m == 2:
        return True
    if n == 1 and m >= 3:
        return False
    if n & 1 and m & 1:
        return False

    return True


n, m, c = map(int, input().split())
if check(n, m, c):
    print("YES")
else:
    print("NO")