program main
  implicit none
  integer::N,M,C,NM
  read *,N,M,C
  NM = N*M

  if(N.eq.1.or.M.eq.1) then
     if(N.eq.2.or.M.eq.2) then
        print '(a)',"YES"
     else
        print '(a)',"NO"
     end if
  else if(MOD(N*M,2).eq.0) then
     print '(a)',"YES"
  else
     print '(a)',"NO"
  end if
end program main