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 ) ;