7cf08168f5dc3f8650bbd58b3680736efe51

풀이 1:

7cf08268f5dc3f8650bbd58b368070698c6f44


7cf08368f5dc3f8650bbd58b36847d6c0486

풀이 2(반전을 이용한 풀이):


7cf08468f5dc3f8650bbd58b3680706e30ea


7cf08568f5dc3f8650bbd58b36887c6ccdc6


7cf08668f5dc3f8650bbd58b36867369cb


7cf08768f5dc3f8650bbd58b36807665d8221d


7cf08868f5dc3f8650bbd58b3687726a4b79