from sys import exit

N, M, C = [int(t) for t in input().split()]

if (N == 1 and M == 2) or (N == 2 or M == 1):
    print('YES')
    exit(0)

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