【leetcode】757. Set Intersection Size At Least Two

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【leetcode】757. Set Intersection Size At Least Two

题目如下: 解题思路:贪心算法.首先把intervals按第二个元素从小到大排序,然后遍历intervals,如果集合S和intervals[i]没有交集,那么把intervals[i]的最大值和次大值加入集合S:如果交集只有一个元素,则把最大值加入S. 代码如下: class Solution(object): def intersectionSizeTwo(self, intervals): """ :type intervals: List[List[int]] :rt…

【LeetCode】952. Largest Component Size by Common Factor 解题报告（Python & C++）

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录题目描述题目大意解题方法并查集日期题目地址:https://leetcode.com/problems/largest-component-size-by-common-factor/description/ 题目描述 Given a non-empty array of unique positive integers A, consider the followin…

【leetcode】952. Largest Component Size by Common Factor（Union find）

You are given an integer array of unique positive integers nums. Consider the following graph: There are nums.length nodes, labeled nums[0] to nums[nums.length - 1], There is an undirected edge between nums[i] and nums[j] if nums[i] and nums[j] share…

【LeetCode】Minimum Depth of Binary Tree 二叉树的最小深度 java

[LeetCode]Minimum Depth of Binary Tree Given a binary tree, find its minimum depth. The minimum depth is the number of nodes along the shortest path from the root node down to the nearest leaf node. 递归和非递归,此提比较简单.广度优先遍历即可.关键之处就在于如何保持访问深度. 下面是4种代码: im…

【leetcode】893. Groups of Special-Equivalent Strings

Algorithm [leetcode]893. Groups of Special-Equivalent Strings https://leetcode.com/problems/groups-of-special-equivalent-strings/ 1)problem You are given an array A of strings. Two strings S and T are special-equivalent if after any number of moves,…

【LeetCode】Permutations 解题报告

全排列问题.经常使用的排列生成算法有序数法.字典序法.换位法(Johnson(Johnson-Trotter).轮转法以及Shift cursor cursor* (Gao & Wang)法. [题目] Given a collection of numbers, return all possible permutations. For example, [1,2,3] have the following permutations: [1,2,3], [1,3,2], [2,1,3], [2…

【leetcode】Find All Anagrams in a String

[leetcode]438. Find All Anagrams in a String Given a string s and a non-empty string p, find all the start indices of p's anagrams in s. Strings consists of lowercase English letters only and the length of both strings s and p will not be larger than…