原题链接在这里:https://leetcode.com/problems/longest-repeating-character-replacement/description/ 题目: Given a string that consists of only uppercase English letters, you can replace any letter in the string with another letter at most k times. Find the leng…

题目如下: Given a string that consists of only uppercase English letters, you can replace any letter in the string with another letter at most k times. Find the length of a longest substring containing all repeating letters you can get after performing t…

以最左边为开始,往右遍历,不一样的个数大于K的时候停止,回到第一个不一样的地方,以它为开始,继续.. 用QUEUE记录每次不一样的INDEX,以便下一个遍历开始, 从左往右,从右往左各来一次..加上各种剪枝情况,比如未遍历的数量<剩余K的数量,比如已经记录过某个INDEX了.. 然后TLE了...最后放TLE的方法..不知道有什么意义.. 上面的做法是左右各来一次,那是否可以使用滑窗呢.. 然后没做出来..看了讨论区..果然是滑窗.. 思路: 统计当前滑窗内最多的字母,窗口宽度 - 最多字母数量…

给你一个仅由大写英文字母组成的字符串,你可以将任意位置上的字符替换成另外的字符,总共可最多替换 k 次.在执行上述操作后,找到包含重复字母的最长子串的长度.注意:字符串长度 和 k 不会超过 104.示例 1:输入:s = "ABAB", k = 2输出:4解释:用两个'A'替换为两个'B',反之亦然.示例 2:输入:s = "AABABBA", k = 1输出:4解释:将中间的一个'A'替换为'B',字符串变为 "AABBBBA".子串 &qu…

作者: 负雪明烛 id: fuxuemingzhu 公众号:每日算法题 本文关键词:LeetCode,力扣,算法,算法题,字符串,双指针,刷题群 目录 题目描述 题目大意 解题方法 双指针 代码 欢迎加入组织 日期 题目地址:https://leetcode.com/problems/longest-repeating-character-replacement/description/ 题目描述 Given a string that consists of only uppercase En…

Given a string that consists of only uppercase English letters, you can replace any letter in the string with another letter at most k times. Find the length of a longest substring containing all repeating letters you can get after performing the abo…

Given a string that consists of only uppercase English letters, you can replace any letter in the string with another letter at most k times. Find the length of a longest substring containing all repeating letters you can get after performing the abo…

Given a string that consists of only uppercase English letters, you can replace any letter in the string with another letter at most k times. Find the length of a longest substring containing all repeating letters you can get after performing the abo…

1. Question Given a string that consists of only uppercase English letters, you can replace any letter in the string with another letter at most k times. Find the length of a longest substring containing all repeating letters you can get after perfor…

""" Given a string s that consists of only uppercase English letters, you can perform at most k operations on that string. In one operation, you can choose any character of the string and change it to any other uppercase English character.…

Given a string that consists of only uppercase English letters, you can replace any letter in the string with another letter at most k times. Find the length of a longest substring containing all repeating letters you can get after performing the abo…

2018-06-29 22:56:24 问题描述: 问题求解: 本题是一条字符串问题,且是求Optimal,自然最初想到的是使用DP来进行求解,但是问题就是如果采用DP的话,前一个状态也太多了,和替换了多少了k值相关,因此从这个角度来说,使用DP来处理本题是不太合适的. 那么,另一个处理的手段滑动窗口就呼之欲出了. 在本题中窗口[start, end]来维护,其中只要窗口长度 - 窗口中出现字符最多的个数 <= k则当前窗口的长度符合题意,只要找出最长的符合条件的窗口即可. 问题是如果出现了上述…

Description Given a string, find length of the longest repeating subsequence such that the two subsequence don’t have same string character at same position, i.e., any ith character in the two subsequences shouldn’t have the same index in the origina…

原题链接在这里:https://leetcode.com/problems/swap-for-longest-repeated-character-substring/ 题目: Given a string text, we are allowed to swap two of the characters in the string. Find the length of the longest substring with repeated characters. Example 1: In…

原题链接在这里:https://leetcode.com/problems/longest-repeating-substring/ 题目: Given a string S, find out the length of the longest repeating substring(s). Return 0 if no repeating substring exists. Example 1: Input: "abcd" Output: 0 Explanation: There…

题目如下: Given a string text, we are allowed to swap two of the characters in the string. Find the length of the longest substring with repeated characters. Example 1: Input: text = "ababa" Output: 3 Explanation: We can swap the first 'b' with the…

Given a string, find the length of the longest substring without repeating characters. 来源:力扣(LeetCode)链接:https://leetcode-cn.com/problems/longest-substring-without-repeating-characters著作权归领扣网络所有.商业转载请联系官方授权,非商业转载请注明出处. 这道题目一拿到手,想都不用想,直接暴力遍历.然而结果虽然可行,…

题目 Given a string, find the length of the longest substring without repeating characters. Example 1:  Input:"abcabcbb"   Output:3  Explanation:The answer is "abc",with the length of 3. Example 2:  Input:"bbbb"  Output:1  Expl…

要求 在一个字符串中寻找没有重复字母的最长子串 举例 输入:abcabcbb 输出:abc 细节 字符集?字母?数字+字母?ASCII? 大小写是否敏感? 思路 滑动窗口 如果当前窗口没有重复字母,j右移,直到包含重复字母 i右移,直到不包含重复字母 用数组记录字母是否出现过,判断重复 实现 1 class Solution{ 2 public: 3 int lenthOfLongestSubstring(string s){ 4 int freq[256] = {0}; 5 int l = 0…

give a string, all 1 or 0, we can flip a 0 to 1, find the longest 1 substring after the flipping 这是一个简单版本of LC 424 Longest Repeating Character Replacement 又是Window, 又是Two Pointers Window还是采用每次都try to update left使得window valid, 每次都检查最大window package G…

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…

突然很想刷刷题,LeetCode是一个不错的选择,忽略了输入输出,更好的突出了算法,省去了不少时间. dalao们发现了任何错误,或是代码无法通过,或是有更好的解法,或是有任何疑问和建议的话,可以在对应的随笔下面评论区留言,我会及时处理,在此谢过了. 过程或许会很漫长,也很痛苦,慢慢来吧. 编号 题名 过题率 难度 1 Two Sum 0.376 Easy 2 Add Two Numbers 0.285 Medium 3 Longest Substring Without Repeating C…

All LeetCode Questions List(Part of Answers, still updating) 题目汇总及部分答案(持续更新中) Leetcode problems classified by company 题目按公司分类(Last updated: October 2, 2017) .   Top Interview Questions # Title Difficulty Acceptance 1 Two Sum Medium 17.70% 2 Add Two N…

All LeetCode Questions List 题目汇总 Sorted by frequency of problems that appear in real interviews. Last updated: October 2, 2017Google (214)534 Design TinyURL388 Longest Absolute File Path683 K Empty Slots340 Longest Substring with At Most K Distinct C…

源代码地址:https://github.com/hopebo/hopelee 语言:C++ 301. Remove Invalid Parentheses Remove the minimum number of invalid parentheses in order to make the input string valid. Return all possible results. Note: The input string may contain letters other tha…

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~ 如果各位看官们,大神们发现了任何错误,或是代码无法通过OJ,或是有更好的解法,或是有任何疑问,意见和建议的话,请一定要在对应的帖子下面评论区留言告知博主啊(如果不方便注册博客园的话,可以下载下文提到的APP,在Feedback中给博主发邮件交流哈),同时也请大家踊跃地,大量地,盲目地提供各个题目的follow up一起讨论哈,多谢多谢,祝大家刷得愉快…

原题链接在这里:https://leetcode.com/problems/longest-substring-with-at-most-k-distinct-characters/ 题目: Given a string, find the length of the longest substring T that contains at most k distinct characters. For example, Given s = “eceba” and k = 2, T is "ec…

请点击页面左上角 -> Fork me on Github 或直接访问本项目Github地址:LeetCode Solution by Swift    说明:题目中含有$符号则为付费题目. 如:[Swift]LeetCode156.二叉树的上下颠倒 $ Binary Tree Upside Down 请下拉滚动条查看最新 Weekly Contest!!! Swift LeetCode 目录 | Catalog 序        号 题名Title 难度     Difficulty  两数之…

[3]Longest Substring Without Repeating Characters [11]Container With Most Water [15]3Sum (2019年2月26日) 给了一个乱序的数组,返回一个结果数组,数组里面每个元素是一个三元组, 三元组的和加起来为0. 题解:先固定第一个数,然后后面两个数的控制用夹逼定理,2 pointers 来解. class Solution { public: vector<vector<int>> threeSu…

Problem statement: Given two strings s1 and s2, write a function to return true if s2 contains the permutation of s1. In other words, one of the first string's permutations is the substring of the second string. Example 1: Input:s1 = "ab" s2 = &…