Tree
Node root = newNode ( 12 ) ; root . left = newNode ( 13 ) ; root . right = newNode ( 12 ) ; root . right . left = newNode ( 14 ) ; root . right . right = newNode ( 16 ) ; root . right . left . left = newNode ( 21 ) ; root . right . left . right = newNode ( 22 ) ; root . right . right . left = newNode ( 22 ) ; root . right . right . right = newNode ( 24 ) ; root . right . right . right . left = newNode ( 8 ) ;