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 = "ab…

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 = "ab…

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 = "ab…

题目要求 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. 题目分析及思路 给定两个只由小写字母组成的字符串s和t,其中t是在s字符串组成…

1.题目大意 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 = &…

题目: 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 = &quo…

-------------------------------------------------- 先计算每个字母的出现次数然后减去,最后剩下的那一个就是后来添加的了. AC代码: public class Solution { public char findTheDifference(String s, String t) { int book[]=new int[26]; for(int i=0;i<s.length();i++) book[s.charAt(i)-'a']++; for…

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…

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 = "…

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 = "ab…

Given a binary search tree with non-negative values, find the minimum absolute difference between values of any two nodes. Example: Input: 1 \ 3 / 2 Output: 1 Explanation: The minimum absolute difference is 1, which is the difference between 2 and 1…

Minimum Time Difference 题解 原创文章,拒绝转载 题目来源:https://leetcode.com/problems/minimum-time-difference/description/ Description Given a list of 24-hour clock time points in "Hour:Minutes" format, find the minimum minutes difference between any two time…

530. Minimum Absolute Difference in BST Given a binary search tree with non-negative values, find the minimum absolute difference between values of any two nodes. Example: Input:      1     \      3     /    2   Output: 1   Explanation: The minimum a…

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 = "abcd"t = "abcde"输出:e解释:'e' 是那个被添加的字母.详见:https://leetcode.com/problems/find-the-difference/description/ C++: 方法一: class Solution { public: char findTheDif…

389. 找不同 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 = "abcd" t = "abcde" 输出: e 解释: 'e' 是那个被添加的字母. class Solution { // public char findTheDifference(String s, String t) { // char res = t.charAt(t…

一开始没看见shuffle...觉得同时遍历不就完事了.. 和那个所有数字出现2,有一个出现3次还是什么的一样,CHAR可以完美和INT相互切换. public class Solution { public char findTheDifference(String s, String t) { int res = 0; for(int i = 0; i < s.length();i++) { res ^= s.charAt(i); } for(int i = 0; i < t.length…

1. 题目 2. 解答 2.1. 方法一 将 s 和 t 转化为 Python 的列表,然后遍历列表 s 的元素,将它们从列表 t 中删除,最后列表 t 中会余下一个元素,即为所求. class Solution: def findTheDifference(self, s, t): """ :type s: str :type t: str :rtype: str """ s_list = list(s) t_list = list(t) fo…

［抄题］: 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 = &q…

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 = "ab…

class Solution { public: char findTheDifference(string s, string t) { map<char,int>Map_Temp; ;i<s.size();i++) Map_Temp[s[i]-'a']++; ;i<t.size();i++) Map_Temp[t[i]-'a']--; map<char,int>::iterator iter; for(iter=Map_Temp.begin();iter!=Map_…

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)); }…

题目如下: Given the root of a binary tree, find the maximum value V for which there exists different nodes A and B where V = |A.val - B.val| and A is an ancestor of B. (A node A is an ancestor of B if either: any child of A is equal to B, or any child of…

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 = "ab…

刷题备忘录,for bug-free leetcode 396. Rotate Function 题意: Given an array of integers A and let n to be its length. Assume Bk to be an array obtained by rotating the array A k positions clock-wise, we define a "rotation function" F on A as follow: F(k…

刷题备忘录,for bug-free 招行面试题--求无序数组最长连续序列的长度,这里连续指的是值连续--间隔为1,并不是数值的位置连续 问题: 给出一个未排序的整数数组,找出最长的连续元素序列的长度. 如: 给出[100, 4, 200, 1, 3, 2], 最长的连续元素序列是[1, 2, 3, 4].返回它的长度:4. 你的算法必须有O(n)的时间复杂度 . 解法: 初始思路 要找连续的元素,第一反应一般是先把数组排序.但悲剧的是题目中明确要求了O(n)的时间复杂度,要做一次排序,是不能达…

算法思想 二分查找 贪心思想 双指针 排序 快速选择 堆排序 桶排序 搜索 BFS DFS Backtracking 分治 动态规划 分割整数 矩阵路径 斐波那契数列 最长递增子序列 最长公共子系列 0-1 背包 数组区间 字符串编辑 其它问题 数学 素数 最大公约数 进制转换 阶乘 字符串加法减法 相遇问题 多数投票问题 其它 数据结构相关 栈和队列 哈希表 字符串 数组与矩阵 1-n 分布 有序矩阵 链表 树 递归 层次遍历 前中后序遍历 BST Trie 图 位运算 参考资料 算法思想 二…

终于将LeetCode的免费题刷完了,真是漫长的第一遍啊,估计很多题都忘的差不多了,这次开个题目汇总贴,并附上每道题目的解题连接,方便之后查阅吧~ 477 Total Hamming Distance 44.10% Meidum 475 Heaters  30.20% Easy 474 Ones and Zeroes  34.90% Meidum 473 Matchsticks to Square  31.80% Medium 472 Concatenated Words 29.20% Hard…

自从上个月进入实验室的云安全项目组后,因为要接触到实际的代码,在实验室博士的建议下我们项目组的硕士开始刷LeetCode练习编程能力,保持每周抽空刷几道算法题.虽然刷的不多,到现在一共只刷了不到30题,但在刷题的过程中还是有很多感触的. 实验室的博士建议我们按照题目的难易顺序循序渐进由易到难来刷,我也就照做了.因为前段时间在系统地学Python语言,所以我主要用的是Python语言来做,有的题目也采用了C/C++.Java甚至C#多种语言来尝试.在刷题的过程中,总结了自己的一些问题: 1. 对于…

463. Island Perimeterhttps://leetcode.com/problems/island-perimeter/就是逐一遍历所有的cell,用分离的cell总的的边数减去重叠的边的数目即可.在查找重叠的边的数目的时候有一点小技巧,就是沿着其中两个方向就好,这种题目都有类似的规律,就是可以沿着上三角或者下三角形的方向来做.一刷一次ac,但是还没开始注意codestyle的问题,需要再刷一遍. class Solution { public: int islandPerime…

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 = "ab…