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The famous ACM (Advanced Computer Maker) Company has rented a floor of a building whose shape is in the following figure. The floor has 200 rooms each 阅读全文
posted @ 2017-11-15 17:02
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摘要:
题目: Professor Zhang has kinds of characters and the quantity of the ii-th character is aiai. Professor Zhang wants to use all the characters build sev 阅读全文
posted @ 2017-11-15 16:43
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