Painting、时光

2015年7月26日

摘要： Today, Soda has learned a sequence whosen-th(n≥1)item is3n(n−1)+1. Now he wants to know if an integermcan be represented as the sum of some items of t... 阅读全文

posted @ 2015-07-26 20:54 Painting、时光阅读(153) 评论(0) 推荐(0) 编辑

HDU5311——字符串——Hidden String

摘要： Today is the 1st anniversary of BestCoder. Soda, the contest manager, gets a stringsof lengthn. He wants to find three nonoverlapping substringss[l1..... 阅读全文

posted @ 2015-07-26 10:42 Painting、时光阅读(145) 评论(0) 推荐(0) 编辑

2015年7月25日

Codeforce417C——二分——Hamburgers

摘要： Polycarpus loves hamburgers very much. He especially adores the hamburgers he makes with his own hands. Polycarpus thinks that there are only three de... 阅读全文

posted @ 2015-07-25 16:05 Painting、时光阅读(203) 评论(0) 推荐(0) 编辑

POJ3273——二分——Monthly Expense

摘要： Farmer John is an astounding accounting wizard and has realized he might run out of money to run the farm. He has already calculated and recorded the ... 阅读全文

posted @ 2015-07-25 16:02 Painting、时光阅读(135) 评论(0) 推荐(0) 编辑

CodeForces 460C——二分+前缀和—— Present

摘要： Little beaver is a beginner programmer, so informatics is his favorite subject. Soon his informatics teacher is going to have a birthday and the beave... 阅读全文

posted @ 2015-07-25 14:34 Painting、时光阅读(246) 评论(0) 推荐(0) 编辑

CodeForces 454C——数学——Little Pony and Expected Maximum

摘要： Twilight Sparkle was playing Ludo with her friends Rainbow Dash, Apple Jack and Flutter Shy. But she kept losing. Having returned to the castle, Twili... 阅读全文

posted @ 2015-07-25 13:25 Painting、时光阅读(231) 评论(0) 推荐(0) 编辑

2015年7月23日

7.23多校——5305DFS——Friends

摘要： There arenpeople andmpairs of friends. For every pair of friends, they can choose to become online friends (communicating using online applications) o... 阅读全文

posted @ 2015-07-23 21:12 Painting、时光阅读(117) 评论(0) 推荐(0) 编辑

Codeforces Round #313 (Div. 2)——C数学题——Gerald's Hexagon

摘要： Gerald got a very curious hexagon for his birthday. The boy found out that all the angles of the hexagon are equal to. Then he measured the length of ... 阅读全文

posted @ 2015-07-23 09:46 Painting、时光阅读(186) 评论(0) 推荐(0) 编辑

Codeforces Round #313 (Div. 2)——D递归，stirng——Equivalent Strings

摘要： Today on a lecture about strings Gerald learned a new definition of string equivalency. Two stringsaandbof equal length are calledequivalentin one of ... 阅读全文

posted @ 2015-07-23 09:43 Painting、时光阅读(176) 评论(0) 推荐(0) 编辑

2015年7月22日

Codeforces Round #312 (Div. 2)——C暴力技巧——Amr and Chemistry

摘要： Amr loves Chemistry, and specially doing experiments. He is preparing for a new interesting experiment.Amr hasndifferent types of chemicals. Each chem... 阅读全文

posted @ 2015-07-22 21:10 Painting、时光阅读(551) 评论(0) 推荐(0) 编辑

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