#int(input())
#map(int, input().split())
#list(map(int, input().split()))

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

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