摘要：
Time limit: 3.000 seconds限时：3.000秒Background背景The saying "You can't see the wood for the trees" is not only a cliche, but is also incorrect. The real problem is that you can't see the trees for the wo... 阅读全文
摘要：
Problem问题The well-known physicist Alfred E Neuman is working on problems that involve multiplying polynomials of x and y. For example, he may need to calculate著名的物理学家纽曼（译注：杜撰人名）正在研究的问题中需要计算多项式的乘积，他可能需... 阅读全文
