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…

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…

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…

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…

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…

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…

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…

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…

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…

Longest Substring Without Repeating Characters Total Accepted: 167158 Total Submissions: 735821 Difficulty: Medium Given a string, find the length of the longest substring without repeating characters. Examples: Given "abcabcbb", the answer is &…

Longest Substring Without Repeating Characters Total Accepted: 167158 Total Submissions: 735821 Difficulty: Medium Given a string, find the length of the longest substring without repeating characters. Examples: Given "abcabcbb", the answer is &…

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…

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 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…

索引 思路1:分治策略 思路2:Brute Force - O(n^3) 思路3:动态规划? O(n^2)版,错解之一:420 ms O(n^2)版,错解之二:388 ms O(n)版,思路转变: 100 ms 细节上的优化(JavaScript限定) 问题描述:https://leetcode.com/problems/longest-substring-without-repeating-characters/ 思路1:分治策略 感觉两下半写完了..没啥收获,就别出心载先写了个分治版本,结果…

https://leetcode.com/problems/longest-substring-without-repeating-characters/ public class Solution { public int lengthOfLongestSubstring(String s) { if(s.length() == 0 )return 0; HashMap<Character,Integer> map = new HashMap<Character, Integer>…

我现在在做一个叫<leetbook>的免费开源书项目,力求提供最易懂的中文思路,目前把解题思路都同步更新到gitbook上了,需要的同学可以去看看 书的地址:https://hk029.gitbooks.io/leetbook/ 003. Longest Substring Without Repeating Characters[M] Longest Substring Without Repeating CharactersM 题目 思路 代码 题目 Given a string, fin…

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…

问题: 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", with the length of 1.G…

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: 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 Exp…

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…