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D - Coloring Brackets CodeForces - 149D 题目描述： 给一个合法的括号串，然后问这串括号有多少种涂色方案，当然啦！涂色是有限制的。 1,每个括号只有三种选择：涂红色，涂蓝色，不涂色。 2,每对括号有且仅有其中一个被... 阅读全文
posted @ 2017-04-21 17:28 蓝空 阅读(169) 评论(0) 推荐(0) 编辑
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POJ - 2955 Brackets We give the following inductive definition of a “regular brackets” sequence: the empty sequence is a regular brackets seque... 阅读全文
posted @ 2017-04-20 20:43 蓝空 阅读(226) 评论(0) 推荐(0) 编辑
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Gappu has a very busy weekend ahead of him. Because, next weekend is Halloween, and he is planning to attend as many parties as he can. Since it'... 阅读全文
posted @ 2017-04-20 18:51 蓝空 阅读(148) 评论(0) 推荐(0) 编辑
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16 / 43 A ZOJ 3537 Cake 43 / 80 B LightOJ 1422 Halloween Costumes 59 / 99 C POJ 2955 Brackets 23 / 31 D CodeFo... 阅读全文
posted @ 2017-04-19 16:14 蓝空 阅读(226) 评论(0) 推荐(1) 编辑
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博客原址： http://blog.csdn.net/cc_again?viewmode=list 动态规划一直是ACM竞赛中的重点，同时又是难点，因为该算法时间效率高，代码量少，多元性强，主要考察思维能力、建模抽象能力、灵活度。 本人动态规划博客地址：http://blog.csd... 阅读全文
posted @ 2017-04-19 15:46 蓝空 阅读(321) 评论(0) 推荐(0) 编辑
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S - Making the Grade POJ - 3666 A straight dirt road connects two fields on FJ's farm, but it changes elevation more than FJ would like. ... 阅读全文
posted @ 2017-04-19 15:22 蓝空 阅读(201) 评论(0) 推荐(0) 编辑
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Bessie is such a hard-working cow. In fact, she is so focused on maximizing her productivity that she decides to schedule her next N (1 ≤ N ≤ 1... 阅读全文
posted @ 2017-04-19 10:50 蓝空 阅读(114) 评论(0) 推荐(0) 编辑
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Today is army day, but the servicemen are busy with the phalanx for the celebration of the 60th anniversary of the PRC. A phalanx is a matrix of ... 阅读全文
posted @ 2017-04-19 10:20 蓝空 阅读(350) 评论(0) 推荐(0) 编辑
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P - FatMouse and Cheese HDU - 1078 FatMouse has stored some cheese in a city. The city can be considered as a square grid of dimension n: e... 阅读全文
posted @ 2017-04-18 22:21 蓝空 阅读(160) 评论(0) 推荐(0) 编辑