MT.Queen

摘要： 题目： 证明： 很容易将最小顶点覆盖归约到HITTING SET。假设要求图G的最小顶点覆盖，可以建立一个 HITTING SET 实例，其中 S1 , S2 , S3,...,Sn 即是图G的各条边，比如{v1,v2},{v3,v4},... 。通过二分式的询问，可以找到一个与 Si都相交的最小集 阅读全文

摘要： 题目： Say you have an array for which the ith element is the price of a given stock on day i. Design an algorithm to find the maximum profit. You may co 阅读全文

摘要： 题目： 107. Binary Tree Level Order Traversal II Given a binary tree, return the bottom-up level order traversal of its nodes' values. (ie, from left to 阅读全文

摘要： 题目：108. Convert Sorted Array to Binary Search Tree Given an array where elements are sorted in ascending order, convert it to a height balanced BST. 题 阅读全文

摘要： 111. Minimum Depth of Binary Tree 问题描述： Given a binary tree, find its minimum depth. The minimum depth is the number of nodes along the shortest path 阅读全文

摘要： 题目： Given an array of strings, group anagrams together. （给定一个字符串数组，将他们根据anagram归类） 样例： given: ["eat", "tea", "tan", "ate", "nat", "bat"], Return: [["a 阅读全文

摘要： 记录一下整个相机的标定矫正过程，希望能够帮助到刚学习标定的童鞋们～ 首先下载matlab calibration toolbox，百度搜索第一条就是了（http://www.vision.caltech.edu/bouguetj/calib_doc/）。下载到本地后，需要在MATLAB中更改主路径： 阅读全文

摘要： 题目： Given an array of integers, 1 ≤ a[i] ≤ n (n = size of array), some elements appear twice and others appear once. Find all the elements that appear 阅读全文

摘要： 题目： Given a list of strings, you need to find the longest uncommon subsequence among them. The longest uncommon subsequence is defined as the longest 阅读全文

摘要： 题目： You have a number of envelopes with widths and heights given as a pair of integers (w, h). One envelope can fit into another if and only if both t 阅读全文