Given a string S, find the length of the longest substring T that contains at most two distinct characters.For example,Given S = “eceba”,T is “ece” which its length is 3. 这道题给我们一个字符串,让我们求最多有两个不同字符的最长子串.那么我们首先想到的是用哈希表来做,哈希表记录每个字符的出现次数,然后如果哈希表中的映射数量超过两…

Given a string s , find the length of the longest substring t  that contains at most 2 distinct characters. Example 1: Input: "eceba" Output: 3 Explanation: tis "ece" which its length is 3. Example 2: Input: "ccaabbb" Output:…

Find the length of the longest substring T of a given string (consists of lowercase letters only) such that every character in T appears no less than k times. Example 1: Input: s = "aaabb", k = 3 Output: 3 The longest substring is "aaa"…

Find the length of the longest substring T of a given string (consists of lowercase letters only) such that every character in T appears no less than k times. Example 1: Input: s = "aaabb", k = 3 Output: 3 The longest substring is "aaa"…

找到给定字符串(由小写字符组成)中的最长子串 T , 要求 T 中的每一字符出现次数都不少于 k .输出 T 的长度.示例 1:输入:s = "aaabb", k = 3输出:3最长子串为 "aaa" ,其中 'a' 重复了 3 次.示例 2:输入:s = "ababbc", k = 2输出:5最长子串为 "ababb" ,其中 'a' 重复了 2 次, 'b' 重复了 3 次. 详见:https://leetcode.com…

Given a string, find the length of the longest substring without repeating characters. Examples: Given "abcabcbb", the answer is "abc", which the length is 3. Given "bbbbb", the answer is "b", with the length of 1.…

题目: 给定一个字符串,请你找出其中不含有重复字符的 最长子串 的长度. Given a string, find the length of the longest substring without repeating characters. 示例 1: 输入: "abcabcbb" 输出: 3 解释: 因为无重复字符的最长子串是 "abc",所以其长度为 3. 示例 2: 输入: "bbbbb" 输出: 1 解释: 因为无重复字符的最长子串…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 公众号:负雪明烛 本文关键词:无重复字符,最长子串,题解,leetcode, 力扣,python, c++, java 目录 题目描述 题目大意 解题方法 解法一:虫取法+set 方法二:一次遍历+字典 日期 题目地址:https://leetcode.com/problems/longest-substring-without-repeating-characters/descrip…

题目 给你一个字符串 s 和一个整数 k ,请你找出 s 中的最长子串, 要求该子串中的每一字符出现次数都不少于k .返回这一子串的长度. 示例 1: 输入:s = "aaabb", k = 3 输出:3 解释:最长子串为 "aaa" ,其中 'a' 重复了 3 次. 示例 2: 输入:s = "ababbc", k = 2 输出:5 解释:最长子串为 "ababb" ,其中 'a' 重复了 2 次, 'b' 重复了 3 次…

395. 至少有K个重复字符的最长子串 找到给定字符串(由小写字符组成)中的最长子串 T , 要求 T 中的每一字符出现次数都不少于 k .输出 T 的长度. 示例 1: 输入: s = "aaabb", k = 3 输出: 3 最长子串为 "aaa" ,其中 'a' 重复了 3 次. 示例 2: 输入: s = "ababbc", k = 2 输出: 5 最长子串为 "ababb" ,其中 'a' 重复了 2 次, 'b'…

题目: Given a . For . 解题思路: 这个题让找一个字符串中具有不重复单词的最长子串的长度,如:ababc,子串为abc,长度为3.有这么几个方法: 方法一: 依赖字符串本身的一些特有函数,进行相应操作来完成.我们可以维护一个子串,来保存最长的无重复的子串,并记录当前子串的长度,如果遇到重复的字符,则去掉子串中重复的字符,一次进行下去,最终就能找到最长无重复子串.如str = ababc, substr = a, ab, ba, ab, abc....类似这样的思路.如下代码: /…

Find the length of the longest substring T of a given string (consists of lowercase letters only) such that every character in T appears no less than k times. Example 1: Input: s = "aaabb", k = 3 Output: 3 The longest substring is "aaa"…

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: "bbbbb" Output: 1 Explana…

找到给定字符串(由小写字符组成)中的最长子串 T , 要求 T 中的每一字符出现次数都不少于 k .输出 T 的长度. 示例 1: 输入: s = "aaabb", k = 3 输出: 3 最长子串为 "aaa" ,其中 'a' 重复了 3 次. 示例 2: 输入: s = "ababbc", k = 2 输出: 5 最长子串为 "ababb" ,其中 'a' 重复了 2 次, 'b' 重复了 3 次. 思路1: 暴力枚举 c…

前言: 每道题附带动态示意图,提供java.python两种语言答案,力求提供leetcode最优解. 描述: 找到给定字符串(由小写字符组成)中的最长子串 T , 要求 T 中的每一字符出现次数都不少于 k .输出 T 的长度. 示例 1: 输入:s = "aaabb", k = 3 输出:3 最长子串为 "aaa" ,其中 'a' 重复了 3 次. 示例 2: 输入:s = "ababbc", k = 2 输出:5 最长子串为 "a…

网址:https://leetcode.com/problems/longest-substring-without-repeating-characters/ 显然采用sliding window滑动窗口法,辅助以哈希表,判断字符是否已使用 不断扩充 j,直到 s[j] 已经使用 此时,把 i 移动到 j 之前的 s[j] 字符前面,继续循环 class Solution { public: int lengthOfLongestSubstring(string s) { , j; ; map…

这道题是LeetCode里的第3道题. 题目描述: 给定一个字符串,请你找出其中不含有重复字符的 最长子串 的长度. 示例 1: 输入: "abcabcbb" 输出: 3 解释: 因为无重复字符的最长子串是 "abc",所以其长度为 3. 示例 2: 输入: "bbbbb" 输出: 1 解释: 因为无重复字符的最长子串是 "b",所以其长度为 1. 示例 3: 输入: "pwwkew" 输出: 3 解释:…

1. 原始题目 给定一个字符串,请你找出其中不含有重复字符的 最长子串 的长度. 示例 1: 输入: "abcabcbb" 输出: 3 解释: 因为无重复字符的最长子串是 "abc",所以其长度为 3. 示例 2: 输入: "bbbbb" 输出: 1 解释: 因为无重复字符的最长子串是 "b",所以其长度为 1. 示例 3: 输入: "pwwkew" 输出: 3 解释: 因为无重复字符的最长子串是 &quo…

题目描述 给定一个字符串,找出不含有重复字符的最长子串的长度. 示例: 给定 "abcabcbb" ,没有重复字符的最长子串是 "abc" ,那么长度就是3. 给定 "bbbbb" ,最长的子串就是 "b" ,长度是1. 给定 "pwwkew" ,最长子串是 "wke" ,长度是3.请注意答案必须是一个子串,"pwke" 是 子序列  而不是子串. 解题思路 采用双指…

一.题目大意 https://leetcode.cn/problems/longest-substring-without-repeating-characters/ 给定一个字符串 s ,请你找出其中不含有重复字符的 **最长子串 **的长度. 示例 1: 输入: s = "abcabcbb" 输出: 3 解释: 因为无重复字符的最长子串是 "abc",所以其长度为 3. 示例 2: 输入: s = "bbbbb" 输出: 1 解释: 因为无重…

Q: A: 分治,对于字符串s的任何一个字符,如果它的频数(在s中出现的次数)小于k,则它一定不会出现在最后的结果里,也就是从它的位置一劈两半,考察左右.对于当前字符串s,我们先建立字典统计其中每种字符出现的次数,对于某字符,假设为x,x在当前字符串中出现的次数小于为kk,kk<k.则所有的字符x可将当前字符串s切片为kk+1个子串,递归对这kk+1个子串进行考察即可. class Solution { public: int longestSubstring(string s, int k)…

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 "ece" which its length is 3. 159. Longest Substring with At Most Two Distinct Characters 的拓展,1…

395. Longest Substring with At Least K Repeating Characters 我的思路是先扫描一遍,然后判断是否都满足,否则,不满足的字符一定不出现,可以作为分割符,然后不断切割,重复这个过程,我不知道运行时间,感觉会tle,然后交了,就ac了. class Solution { public: int work(string &s, int k, int x, int y) { if(y - x + 1 < k) return 0; set<…

395. Longest Substring with At least K Repeating Characters Find the length of the longest substring T of a given string (consists of lowercase letters only) such that every character in T appears no less than k times. Example 1: Input: s = "aaabb&qu…

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 "ece" which its length is 3. 这道题是之前那道Longest Substring with At Most Two Distinct Characters的拓展…

Given a string, find the length of the longest substring without repeating characters. Examples: Given "abcabcbb", the answer is "abc", which the length is 3. Given "bbbbb", the answer is "b", with the length of 1.…

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 "ece" which its length is 3. 题意: 给定字符串,求至多包含K种字符的最长子串 思路: 跟[leetcode]159. Longest Substring wi…

Difficulty: Hard  More:[目录]LeetCode Java实现 Description Given a string S, find the length of the longest substring T that contains at most two distinct characters.For example,Given S = “eceba”,T is "ece" which its length is 3. Intuition 方法一:假设有一个…

Longest Substring with At Most Two Distinct Characters Given a string, find the length of the longest substring T that contains at most 2 distinct characters. For example, Given s = “eceba”, T is "ece" which its length is 3. 可与Longest Substring…

Longest Substring with At Most Two Distinct Characters Given a string, find the length of the longest substring T that contains at most 2 distinct characters. For example, Given s = “eceba”, T is "ece" which its length is 3. 分析: 最多包含两个不同字母的子串,至少…