一.题目 给出由小写字母组成的字符串 S,重复项删除操作会选择两个相邻且相同的字母,并删除它们. 在 S 上反复执行重复项删除操作,直到无法继续删除. 在完成所有重复项删除操作后返回最终的字符串.答案保证唯一. 示例: 输入:"abbaca" 输出:"ca" 解释: 例如,在 "abbaca" 中,我们可以删除 "bb" 由于两字母相邻且相同,这是此时唯一可以执行删除操作的重复项. 之后我们得到字符串 "aaca&q…

1047. 删除字符串中的所有相邻重复项 1047. Remove All Adjacent Duplicates In String 题目描述 LeetCode1047. Remove All Adjacent Duplicates In String简单 Java 实现 import java.util.Stack; class Solution { public String removeDuplicates(String S) { if (S == null || S.length()…

1047. Remove All Adjacent Duplicates In String(删除字符串中的所有相邻重复项) 链接:https://leetcode-cn.com/problems/remove-all-adjacent-duplicates-in-string/ 题目: 给出由小写字母组成的字符串 S,重复项删除操作会选择两个相邻且相同的字母,并删除它们. 在 S 上反复执行重复项删除操作,直到无法继续删除. 在完成所有重复项删除操作后返回最终的字符串.答案保证唯一. 示例:…

lc57 Insert Interval 仔细分析题目,发现我们只需要处理那些与插入interval重叠的interval即可,换句话说,那些end早于插入start以及start晚于插入end的interval都可以保留.我们只需要两个指针,i&j分别保存重叠interval中最早start和最晚end即可,然后将interval [i, j]插入即可 class Solution { public int[][] insert(int[][] intervals, int[] newInte…

这是小川的第389次更新,第419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251题(顺位题号是1047).给定一个小写字母的字符串S,重复删除两个相邻且相等的字母. 我们在S上反复删除,直到我们再也无法删除. 在完成所有此类重复删除后返回最后一个字符串.保证答案是独一无二的. 例如: 输入:"abbaca" 输出:"ca" 说明:在"abbaca"中我们可以删除"bb",因为字母相邻且相等…

problem 1047. Remove All Adjacent Duplicates In String 参考 1. Leetcode_easy_1047. Remove All Adjacent Duplicates In String; 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 栈 日期 题目地址:https://leetcode.com/problems/remove-all-adjacent-duplicates-in-string/ 题目描述 Given a string S of lowercase letters, a duplicate removal consists of choosing two adjac…

题目如下: Given a string S of lowercase letters, a duplicate removal consists of choosing two adjacent and equal letters, and removing them. We repeatedly make duplicate removals on S until we no longer can. Return the final string after all such duplica…

题目如下: Given a string s, a k duplicate removal consists of choosing k adjacent and equal letters from s and removing them causing the left and the right side of the deleted substring to concatenate together. We repeatedly make k duplicate removals on …

当你想删除字符串中的某部分时,java中并没有直接提供相关的方法,比如想删除 "cout<<\"Hello world\"<<endl" 中的 "Hello World",可以先从头截取到第一个双引号,然后从第二个双引号截取到字符串最后,最后将前面两步得到的子字符串连接起来. 还有一种,你可以在原字符串上用 ""直接替代掉 "Hello World" 这一部分. 解释一下 int i…

string类中有很多好用的函数,这里介绍在string类字符串中查找字符串的函数. string类字符串中查找字符串一般可以用: 1.s.find(s1)函数,从前往后查找与目标字符串匹配的第一个位置: 2.s.rfind(s1)函数,从后往前查找与目标字符串匹配的最后一个位置: 3.s.find_first_of(s1),查找在s1中任意一个字符在s中第一次出现的位置 4.s.find_last_of(s1)       查找在s1中任意一个字符在s中最后一次出现的位置 下面给出一道例题:…

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 智商题 相似题目 参考资料 日期 题目地址:https://leetcode.com/problems/swap-adjacent-in-lr-string/description/ 题目描述 In a string composed of 'L', 'R', and 'X' characters, like "RXXLRXRXL", a…

Consider the string s to be the infinite wraparound string of "abcdefghijklmnopqrstuvwxyz", so s will look like this: "...zabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcd....". Now we have another string p. Your job is to find…

Write a function that takes a string as input and reverse only the vowels of a string. Example 1:Given s = "hello", return "holle". Example 2:Given s = "leetcode", return "leotcede". 这道题让我们翻转字符串中的元音字母,元音字母有五个a,e,i,o…

Given an input string, reverse the string word by word. For example, Given s = "the sky is blue", return "blue is sky the". Update (2015-02-12): For C programmers: Try to solve it in-place in O(1) space. click to show clarification. Cl…

Given an array of integers, 1 ≤ a[i] ≤ n (n = size of array), some elements appear twice and others appear once. Find all the elements that appear twice in this array. Could you do it without extra space and in O(n) runtime? Example: Input: [4,3,2,7,…

Given an input string, reverse the string word by word. For example,Given s = "the sky is blue",return "blue is sky the". Update (2015-02-12):For C programmers: Try to solve it in-place in O(1) space. Clarification: What constitutes a…

题目例如以下: Given an input string, reverse the string word by word. For example, Given s = "the sky is blue", return "blue is sky the". click to show clarification. Clarification: What constitutes a word? A sequence of non-space characters…

1.题目描述 Given a string, find the first non-repeating character in it and return it's index. If it doesn't exist, return -1. Examples:  s = "leetcode" return 0.  s = "loveleetcode", return 2. Note: You may assume the string contain only…

编写一个函数,以字符串作为输入,反转该字符串中的元音字母.示例 1:给定 s = "hello", 返回 "holle".示例 2:给定 s = "leetcode", 返回 "leotcede".注意:元音字母不包括 "y".详见:https://leetcode.com/problems/reverse-vowels-of-a-string/description/ C++: class Solutio…

public class RemoveAllAdjacentDuplicatesInString { /* 解法一:栈 */ public String removeDuplicates(String S) { Stack<Character> stack=new Stack<>(); for (char c:S.toCharArray()){ if (stack.isEmpty()||c!=stack.peek()) stack.push(c); else stack.pop()…

To some string S, we will perform some replacement operations that replace groups of letters with new ones (not necessarily the same size). Each replacement operation has 3 parameters: a starting index i, a source word x and a target word y.  The rul…

一年没有管理博客园了,说来实在惭愧.. 最近开始刷LeetCode,之前没刷过,说来也实在惭愧... 刚开始按 AC Rates 从简单到难刷,觉得略无聊,就决定按 Add Date 刷,以后也可能看心情随便选题…(⊙o⊙)…今天做了14年 Add 的三个题,其中 Maximum Product Subarray 着实把我折腾了好一会儿,所以想想还是跟大家分享一下我的解法,也或许有更好的方法,期待大家的分享.就把三个题按 Add Date 的先后顺序分享一下吧. Add Date 2014-03…

Remove all elements from a linked list of integers that have value val. ExampleGiven: 1 --> 2 --> 6 --> 3 --> 4 --> 5 --> 6, val = 6Return: 1 --> 2 --> 3 --> 4 --> 5 题目标签:Linked List 题目给了我们一个 链表 和一个 val,让我们把链表中 等于 val 的点都去除.…

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 日期 题目地址:https://leetcode.com/problems/reverse-words-in-a-string/description/ 题目描述 Given an input string, reverse the string word by word. Example 1: Input: "the sky is blue"…

Given an input string, reverse the string word by word. For example,Given s = "the sky is blue",return "blue is sky the". Have you met this question in a real interview? Yes Clarification What constitutes a word?A sequence of non-space…

［抄题］: Write a function that takes a string as input and reverse only the vowels of a string. Example 1:Given s = "hello", return "holle". Example 2:Given s = "leetcode", return "leotcede". [暴力解法]:抽出来再放回去:不现实 时间分析: 空…

详见:https://leetcode.com/problems/unique-substrings-in-wraparound-string/description/ C++: class Solution { public: int findSubstringInWraproundString(string p) { vector<int> cnt(26, 0); int len = 0; for (int i = 0; i < p.size(); ++i) { if (i >…

Given a string s consists of upper/lower-case alphabets and empty space characters ' ', return the length of last word in the string.If the last word does not exist, return 0. Note: A word is defined as a character sequence consists of non-space char…

1.实现背景 在插入list行时用邮件的MessageID给对应行命名. 在回复全部邮件时,收件人变为之前收件人中出去“自己”同时加入之前发件人,抄送人还是之前的抄送人,密送人不用管,直接不用带. 在“回复全部”按钮响应函数里面 CListUI* pList = static_cast<CListUI*>(m_PaintManager.FindControl(_T("middle_comlumn_header1")));//拿到list控件指针            int…