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The company "21st Century Fruits" has specialized in creating new sorts of fruits by transferring genes from one fruit into the genome of another one. 阅读全文
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In a few months the European Currency Union will become a reality. However, to join the club, the Maastricht criteria must be fulfilled, and this is n 阅读全文
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A subsequence of a given sequence is the given sequence with some elements (possible none) left out. Given a sequence X = <x1, x2, ..., xm> another se 阅读全文
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JGShining's kingdom consists of 2n(n is no more than 500,000) small cities which are located in two parallel lines. Half of these cities are rich in r 阅读全文
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A numeric sequence of ai is ordered if a1 < a2 < ... < aN. Let the subsequence of the given numeric sequence ( a1, a2, ..., aN) be any sequence ( ai1, 阅读全文
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Given a two-dimensional array of positive and negative integers, a sub-rectangle is any contiguous sub-array of size 1*1 or greater located within the 阅读全文
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Given a sequence a[1],a[2],a[3]......a[n], your job is to calculate the max sum of a sub-sequence. For example, given (6,-1,5,4,-7), the max sum in th 阅读全文
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Summer is coming! It's time for Iahub and Iahubina to work out, as they both want to look hot at the beach. The gym where they go is a matrix a with n 阅读全文
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在讲述DP算法的时候，一个经典的例子就是数塔问题，它是这样描述的： 有如下所示的数塔，要求从顶层走到底层，若每一步只能走到相邻的结点，则经过的结点的数字之和最大是多少？ 已经告诉你了，这是个DP的题目，你能AC吗? Input输入数据首先包括一个整数C,表示测试实例的个数，每个测试实例的第一行是一个 阅读全文
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1698: 送外卖 题目描述 在美团和饿了么大行其道的今天，囊中羞涩的小周和小美，也随大流加入了配送员的行列。每天下课后，他们都去堕落街帮北京烤鸭店送外卖。 过了好些日子，小周发现每次送外卖，小美总比自己先回来，就算自己拼命跑啊跑，也总是比她慢，明明小美也是和自己一样，走着去送外卖的（等外卖的都饿死 阅读全文