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

if N == 1:
  if M==2:
    travlable = True
elif M == 1:
  if N==2:
    travlable = True
elif M%2==0 or N%2==0:
  travlable = True

if travlable:
  print("YES")
else:
  print("NO")