the difference easy hard version constraintsVova like picture kitten the news feed social network use represent array n consecutive picture kitten course Vova like picture beautiful ith picture beauty a_iVova wants repost exactly x picture way segment news feed k consecutive picture picture reposte Vova sum beauty value reposte picture maximum possible for example k1 Vova repost picture news feed if k2 Vova skip picture pair consecutive picture Vova repost themYour task calculate maximum possible sum value reposte picture Vova follow condition describe way satisfy condition