异或 找不同 —.— public class Solution { public char findTheDifference(String s, String t) { char temp = 0x00; for(int i = 0;i < s.length();i++){ temp =(char) (temp ^ s.charAt(i)); } for(int i = 0;i < t.length();i++){ temp =(char) (temp ^ t.charAt(i)); }…

原题 Given two strings s and t which consist of only lowercase letters. String t is generated by random shuffling string s and then add one more letter at a random position. Find the letter that was added in t. Example: Input: s = "abcd" t = "…

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 方法一:字典统计次数 方法二:异或 方法三:排序 日期 [LeetCode] https://leetcode.com/problems/find-the-difference/ Difficulty: Easy 题目描述 Given two strings s and t which consist of only lowercase letter…

最小二次方时序差分学习 原文地址: https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=9&cad=rja&uact=8&ved=2ahUKEwjD6qn5x8zhAhVSuZ4KHfJTCyUQFjAIegQIBBAC&url=https%3A%2F%2Fiu.instructure.com%2Ffiles%2F69696547%2Fdownload%3Fdow…

problem 530. Minimum Absolute Difference in BST 参考 1. Leetcode_easy_530. Minimum Absolute Difference in BST; 2. Grandyang_二叉搜索树的最小绝对差; 完…

题目如下: Given an array of distinct integers arr, find all pairs of elements with the minimum absolute difference of any two elements. Return a list of pairs in ascending order(with respect to pairs), each pair [a, b] follows a, b are from arr a < b b -…

389.找不同 知识点:哈希表.抵消思想: 题目描述 给定两个字符串 s 和 t,它们只包含小写字母. 字符串 t 由字符串 s 随机重排,然后在随机位置添加一个字母. 请找出在 t 中被添加的字母. 示例 输入:s='abcdac'; t='adaccbb'; 输出:'b'; 解释:因为b是被添加的元素,不一定在最后位置: 解法一:数组型哈希表: 这道题目可以用哈希表去做,采用数组型哈希表:数组本身就是一个哈希表:其索引作为一个key,其值作为value:方法如下:可以将26个字母作为key,…

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 排序 日期 题目地址:https://leetcode.com/problems/minimum-absolute-difference/ 题目描述 Given an array of distinct integers arr, find all pairs of elements with the minimum absolute differen…

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 Java解法 Python解法 日期 题目地址:https://leetcode.com/problems/minimum-absolute-difference-in-bst/#/description 题目描述 Given a binary search tree with non-negative values, find the minimu…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.me/ 题目地址:https://leetcode.com/problems/minimum-time-difference/description/ 题目描述: Given a list of 24-hour clock time points in "Hour:Minutes" format, find the minimum minutes difference between…