题目标签:Math 题目给了我们三个点,让我们判断这三个点是否在一条直线上. 利用斜率 k = (y1 - y0) / (x1 - x0) 来判断,如果 三个点 abc, ab 的斜率 = bc 的斜率,那么这三个点在一条直线上.因为分母位置上 可能会出现0, 所以把除法转换成乘法.具体看code. Java Solution: Runtime:  0 ms, faster than 100 % Memory Usage: 34 MB, less than 100 % 完成日期:07/31/20…

problem 1037. Valid Boomerang 参考 1. Leetcode_easy_1037. Valid Boomerang; 完…

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 中学数学题 日期 题目地址:https://leetcode.com/problems/valid-boomerang/ 题目描述 A boomerang is a set of 3 points that are all distinct and not in a straight line. Given a list of three point…

题目如下: A boomerang is a set of 3 points that are all distinct and not in a straight line. Given a list of three points in the plane, return whether these points are a boomerang. Example 1: Input: [[1,1],[2,3],[3,2]] Output: true Example 2: Input: [[1,…

第一种方法,用栈实现,最容易想到,也比较容易实现,每次碰到‘)’时update max_len,由于要保存之前的‘(’的index,所以space complexity 是O(n) // 使用栈,时间复杂度 O(n),空间复杂度 O(n) class Solution { public: int longestValidParentheses(string s) { , last = -; stack<int> lefts; ; i < s.size(); ++i) { if (s[i]…

指数:[LeetCode] Leetcode 解决问题的指数 (C++/Java/Python/Sql) Github: https://github.com/illuz/leetcode 036. Valid Sudoku (Easy) 链接: 题目:https://leetcode.com/problems/valid-sudoku/ 代码(github):https://github.com/illuz/leetcode 题意: 推断一个数独是否有效. 有效的数独不强求有解. 分析: 仅仅…

LeetCode:36. Valid Sudoku,数独是否有效 : 题目: LeetCode:36. Valid Sudoku 描述: Determine if a Sudoku is valid, according to: Sudoku Puzzles - The Rules. The Sudoku board could be partially filled, where empty cells are filled with the character '.'. A partiall…

Given a string containing only three types of characters: '(', ')' and '*', write a function to check whether this string is valid. We define the validity of a string by these rules: Any left parenthesis '(' must have a corresponding right parenthesi…

Given a non-empty string s, you may delete at most one character. Judge whether you can make it a palindrome. Example 1: Input: "aba" Output: True Example 2: Input: "abca" Output: True Explanation: You could delete the character 'c'. N…

这是小川的第387次更新,第416篇原创 01 看题和准备 今天介绍的是LeetCode算法题中Easy级别的第248题(顺位题号是1037).回旋镖是一组各不相同且不在一条直线上的三个点.给出三个点的列表,判断这些点是否是回旋镖. 例如: 输入:[[1,1],[2,3],[3,2]] 输出:true 输入:[[1,1],[2,2],[3,3]] 输出:false 注意: points.length == 3 points[i].length == 2 0 <= points[i][j] <=…