N, M, C = [int(i) for i in input().strip().split(" ")]
if N > M:
    N, M = M, N

if N == 1:
    if M == 2:
        print("YES")
    else:
        print("NO")
else:
    if N*M % 2 == 0:
        print("YES")
    else:
        print("NO")