You are asked to cut off trees in a forest for a golf event. The forest is represented as a non-negative 2D map, in this map: 0 represents the obstacle can't be reached. 1 represents the ground can be walked through. The place with number bigger than…

You are asked to cut off trees in a forest for a golf event. The forest is represented as a non-negative 2D map, in this map: 0 represents the obstacle can't be reached. 1 represents the ground can be walked through. The place with number bigger than…

原题链接在这里:https://leetcode.com/problems/cut-off-trees-for-golf-event/description/ 题目: You are asked to cut off trees in a forest for a golf event. The forest is represented as a non-negative 2D map, in this map: 0 represents the obstacle can't be reach…

You are asked to cut off trees in a forest for a golf event. The forest is represented as a non-negative 2D map, in this map: 0 represents the obstacle can't be reached. 1 represents the ground can be walked through. The place with number bigger than…

You are asked to cut off trees in a forest for a golf event. The forest is represented as a non-negative 2D map, in this map: 0 represents the obstacle can't be reached. 1 represents the ground can be walked through. The place with number bigger than…

// Potential improvements: // 1. we can use vector<int> { h, x, y } to replace Element, sorting vector is to compare elements one by one. // 2. use 2-d bool vector<vector<bool>> to replace unordered_set. class Element { public: int x, y,…

You are asked to cut off trees in a forest for a golf event. The forest is represented as a non-negative 2D map, in this map: 0 represents the obstacle can't be reached. 1 represents the ground can be walked through. The place with number bigger than…

For a undirected graph with tree characteristics, we can choose any node as the root. The result graph is then a rooted tree. Among all possible rooted trees, those with minimum height are called minimum height trees (MHTs). Given such a graph, write…

今天有同事问我下面这段代码是什么意思: var MyClass = function() { events.EventEmitter.call(this); // 这行是什么意思? }; util.inherits(MyClass, events.EventEmitter); // 还有这行? 我也不是很明白,于是研究了一下.下面是我的一些体会. Christmas Trees和Errors 如果你写过JavaScript或NodeJS代码,你也许会对callback地狱深有体会.每次当你进行异…

原题链接在这里:https://leetcode.com/problems/minimum-height-trees/ 题目: For a undirected graph with tree characteristics, we can choose any node as the root. The result graph is then a rooted tree. Among all possible rooted trees, those with minimum height a…