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题目描述 Description The advice to "buy low" is half the formula to success in the bovine stock market.To be considered a great investor you must also fol 阅读全文
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题目描述 Description Before bridges were common, ferries were used to transport cars across rivers. River ferries, unlike their larger cousins, run on a g 阅读全文
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题目描述 Description 给出一个N个点的树,找出一个点来,以这个点为根的树时,所有点的深度之和最大 输入描述 Input Description 给出一个数字N,代表有N个点.N<=1000000 下面N-1条边. 输出描述 Output Description 输出你所找到的点,如果具有 阅读全文