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题目 链接: "https://leetcode.com/problems/counting bits" Level: Medium Discription: Given a non negative integer number num. For every numbers i in the ra 阅读全文
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题目 链接: "https://leetcode.com/problems/best time to buy and sell stock with transaction fee/" Level: Medium Discription: Your are given an array of int 阅读全文
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题目 链接: "https://www.nowcoder.com/question/next?pid=8537228&qid=141031&tid=22230511" Level: 2018算法工程师笔试题 Discription: 字符串S由小写字母构成,长度为n。定义一种操作,每次都可以挑选字符 阅读全文
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题目 链接: "https://leetcode.com/problems/sort colors/" Level: Medium Discription: Given an array with n objects colored red, white or blue, sort them in 阅读全文
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题目 链接: "https://leetcode.com/problems/image overlap/" Level: Medium Discription: Two images A and B are given, represented as binary, square matrices 阅读全文
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题目 链接: "https://leetcode.com/problems/subsets/" Level: Medium Discription: Given a set of distinct integers, nums, return all possible subsets (the po 阅读全文
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题目 链接: "https://leetcode.com/problems/combination sum iii/" Level: Medium Discription: Find all possible combinations of k numbers that add up to a nu 阅读全文
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我来挖坑了~~~~ 阅读全文
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如何解释均值和中位数的大小关系呢? 实验室要处理敦煌莫高窟人流数据处理的任务,观察到每个洞窟的访问时间应该时遵循正偏态分布的。于是想起数据挖掘课上提到的正偏态分布中,均值大于中位数的问题。思考很久无法证明。 关于正偏态,正态和负偏态的图如下。 正偏也叫右偏,看起来好像是峰值在左,怎么会叫右偏呢?按维 阅读全文
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题目 链接: "https://leetcode.com/problems/max chunks to make sorted/" Level: Medium Discription: Given an array arr that is a permutation of [0, 1, ..., a 阅读全文