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

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