N, M, C = map(int, input().split())

if (N == 1 and M == 2) or (N == 2 and M == 1):
    print('YES')
elif N == 1 or M == 1:
    print('NO')
elif N % 2 == 1 and M % 2 == 1:
    print('NO')
else:
    print('YES')