Given a sequence of binary trees, you are to write a program that prints a level-order traversal of each tree.

给定一个二叉树序列，你要写一个程序将每棵树按层序访问并打印出来。

youdao

youdao

youdao

In accordance with state tax laws, the total selling price of an item will generally include item-level shipping and handling charges, item-level discounts, gift-wrap charges, and an allocation of order-level shipping and handling charges and order-level discounts.

FORBES: Confused By Amazon Taxes? You're Not Alone

Their position also requires a strong focus on the day-to-day stuff that needs to happen in order to achieve the high-level objectives.

FORBES: Are We Neglecting Our Middle Managers?

Woods, looking for a first major win since the 2008 U.S. Open, slipped down the pecking order after a level-par final round.

CNN: PGA champion McIlroy revels in defying doubters