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 without repeating characters. For example, the longest substring without repeating letters for "abcabcbb" is "abc", which the length is 3. For "bbbbb" the longest subst…

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

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…

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 l…

题意:给一字符串,求一个子串的长度,该子串满足所有字符都不重复.字符可能包含标点之类的,不仅仅是字母.按ASCII码算,就有2^8=128个. 思路:从左到右扫每个字符,判断该字符距离上一次出现的距离是多少,若大于max,则更新max.若小于,则不更新.每扫到一个字符就需要更新他的出现位置了.这里边还有个注意点,举例说明: 假如有长为16串 s="arbtbqwecpoiuyca" 当扫到第2个b时,距离上一个b的距离是2:(直接减) 当扫到第2个c时,距离上一个c的距离是6:(直接减…

Given a string, find the length of the longest substring without repeating characters. For example, the longest substring without repeating letters for "abcabcbb" is "abc", which the length is 3. For "bbbbb" the longest subst…

最长无重复字符的子串 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…

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…

题目: 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…

Given a string, find the length of the longest substring without repeating characters. For example, the longest substring without repeating letters for "abcabcbb" is "abc", which the length is 3. For "bbbbb" the longest subst…

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.Give…

题意很简单,就是寻找一个字符串中连续的最长包含不同字母的子串. 其实用最朴素的方法,从当前字符开始寻找,找到以当前字符开头的最长子串.这个方法猛一看是个n方的算法,但是要注意到由于字符数目的限制,其实这是个O(Cn)的算法,最长也不过是C长度.所以我觉得普通方法应该是能过的. 于是写了一个,字符数目最大也不超过256所以代码如下: class Solution { public: int lengthOfLongestSubstring(string s) { ; ;i<s.length();i…

题目意思:求字符串中,最长不重复连续子串 思路:使用hashmap,发现unordered_map会比map快,设置一个起始位置,计算长度时,去减起始位置的值 eg:a,b,c,d,e,c,b,a,e 0 1 2 3 4 4 0 6 5 3 4 4 3 8 再次出现c时,将start值置为map[c]+1=3,对于下一个b,因为map[b]<start,则直接map[b]=i class Solution { public: int lengthOfLongestSubstring(string…

只遍历一次字符串即可求出最长不重复子串的长度. int lengthOfLongestSubstring(string s) { vector<,-); //记录字符上一次出现的位置,ASCII共有256个 ; //当前所在不重复子串的起始位置的上一个位置 ; ;i<s.size();i++) { if(charhash[s[i]]>start) //如果该字符在当前子串中出现过 start=charhash[s[i]]; //开始新的子串 charhash[s[i]]=i; //更新字…

题目链接 Given a string, find the length of the longest substring without repeating characters. For example, the longest substring without repeating letters for "abcabcbb" is "abc", which the length is 3. For "bbbbb" the longest…

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 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.…

Question: 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 len…

Level:   Medium 题目描述: 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&q…

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…

这是悦乐书的第341次更新,第365篇原创 01 看题和准备 今天介绍的是LeetCode算法题中Medium级别的第2题Longest Substring Without Repeating Characters(顺位题号是3).给定一个字符串,找到最长无重复字符子字符串的长度.例如: 输入:"abcabcbb" 输出:3 说明:答案是"abc",长度为3. 输入:"bbbbb" 输出:1 说明:答案是"b",长度为1. 输…

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…

题目来源:https://leetcode.com/problems/longest-substring-without-repeating-characters/ Given a string, find the length of the longest substring without repeating characters. For example, the longest substring without repeating letters for "abcabcbb"…

Given a string, find the length of the longest substring without repeating characters. For example, the longest substring without repeating letters for "abcabcbb" is "abc", which the length is 3. For "bbbbb" the longest subst…

问题描述: 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…

题目描述 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 Expl…

题目描述 Given a string, find the length of the longest substring without repeating characters. For example, the longest substring without repeating letters for "abcabcbb" is "abc", which the length is 3. For "bbbbb" the longest…

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.…