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…

Longest Valid Parentheses Given a string containing just the characters '(' and ')', find the length of the longest valid (well-formed) parentheses substring. For "(()", the longest valid parentheses substring is "()", which has length…

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…

题目要求 Given two strings s and t , write a function to determine if t is an anagram of s. 题目分析及思路 给出两个字符串s和t,要求判断t是否是s的一个anagram,即由相同的字母且不同的字母顺序组成.可以使用collections.Counter统计每个字符串中不同字母的的个数,若两个字符串中的字母种类和个数都相等,则可判定t是s的一个anagram. python代码 class Solution: de…

[LeetCode]36. Valid Sudoku 解题报告(Python) 作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 题目地址:https://leetcode.com/problems/valid-sudoku/description/ 题目描述: Determine if a 9x9 Sudoku board is valid. Only the filled cells need to be validated ac…

[LeetCode]593. Valid Square 解题报告(Python) 作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 题目地址:https://leetcode.com/problems/valid-square/description/ 题目描述: Given the coordinates of four points in 2D space, return whether the four points could…

LeetCode 1 Two Sum 解题报告 偶然间听见leetcode这个平台,这里面题量也不是很多200多题,打算平时有空在研究生期间就刷完,跟跟多的练习算法的人进行交流思想,一定的ACM算法积累可以对以后在对算法中优化带来好处.Ok,今天是我做的第一题Add Two Sum. 题目要求 Given an array of integers, find two numbers such that they add up to a specific target number. The fu…

[题目] Given a collection of numbers that might contain duplicates, return all possible unique permutations. For example, [1,1,2] have the following unique permutations: [1,1,2], [1,2,1], and [2,1,1]. [解析] 题意:求一个数组的全排列.与[LeetCode]Permutations 解题报告 不同的是…

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

[LeetCode]Island Perimeter 解题报告 [LeetCode] https://leetcode.com/problems/island-perimeter/ Total Accepted: 16143 Total Submissions: 28552 Difficulty: Easy Question You are given a map in form of a two-dimensional integer grid where 1 represents land…