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After coding so many days,Mr Acmer wants to have a good rest.So travelling is the best choice!He has decided to visit n cities(he insists on seeing al 阅读全文
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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
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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
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Luke wants to upgrade his home computer network from 10mbs to 100mbs. His existing network uses 10base2 (coaxial) cables that allow you to connect any 阅读全文
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Groundhogs are good at digging holes, their home is a hole, usually a group of groundhogs will find a more suitable area for their activities and buil 阅读全文
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You've got an array a, consisting of n integers a1, a2, ..., an. You are allowed to perform two operations on this array: Expression means applying bi 阅读全文