原题链接:http://ac.jobdu.com/problem.php?pid=1530 字符串简单题,看似O(n^2)的复杂度10000的数据量会tle,其实最长不重复子串不超过26个嘛... 如下: #include<algorithm> #include<iostream> #include<cstdlib> #include<cstring> #include<cstdio> using std::max; ; ]; char buf[…

题目描述: 最长不重复子串就是从一个字符串中找到一个连续子串,该子串中任何两个字符都不能相同,且该子串的长度是最大的. 输入: 输入包含多个测试用例,每组测试用例输入一行由小写英文字符a,b,c...x,y,z组成的字符串,字符串的长度不大于10000. 输出: 对于每组测试用例,输出最大长度的不重复子串长度. 样例输入: absd abba abdffd 样例输出: 4 2 4 阿尔卡特2013年实习生招聘笔试题 #include <iostream> using namespace std…

题目描述: 最长不重复子串就是从一个字符串中找到一个连续子串,该子串中任何两个字符都不能相同,且该子串的长度是最大的. 输入: 输入包含多个测试用例,每组测试用例输入一行由小写英文字符a,b,c...x,y,z组成的字符串,字符串的长度不大于10000. 输出: 对于每组测试用例,输出最大长度的不重复子串长度. 样例输入: absd abba abdffd 样例输出: 4 2 4一开始的代码是这样 #include <cstdio> #include <cstdlib> #incl…

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…

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:http://acm.hdu.edu.cn/showproblem.php?pid=2668 Daydream Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 1658    Accepted Submission(s): 490 Problem Description Welcome to 2009 HDU Girl’s C…

功能:找出来一个字符串中最长不重复子串 def find_longest_no_repeat_substr(one_str): #定义一个列表用于存储非重复字符子串 res_list=[] #获得字符串长度 length=len(one_str) for i in range(length): tmp=one_str[i] for j in range(i+1, length): #用取到的字符与tmp中的字符相匹配,匹配不成功tmp字符继续增加,匹配成功直接跳出循环加入到res_list列表中…

一.代码及注释 class Solution { public: int lengthOfLongestSubstring(string s) { int n = s.size(); //字符串的长度 ; //最长无重复子串的长度 //建立map表 key为字符 val为该字符的下一个坐标位置 //val取符号坐标+1用于更新start unordered_map<char,int> m; //定义start和end end即为当前字符,不断+1 ,end=;end<n;end++){…

题目 给定一个字符串,找出不含有重复字符的最长子串的长度. 解答 刚开始以为只是一遍遍历后来的字符和前面一样便开始算新子串,给的案例都过了,但是卡在了"dvdf" 后来经过重重试验,暴力循环,不断调整变量作用域,在经过 "ohvhjdml" "bbbbb" "abcabcbb" "pwwkew" "ppkw" "ak" 这几个字符串的测试下,暴力法终于通过了,但是用时…

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…

题目描述: 给定一个字符串 s,找到 s 中最长的回文子串.你可以假设 s 的最大长度为 1000. 示例 1: 输入: "babad"输出: "bab"注意: "aba" 也是一个有效答案.示例 2: 输入: "cbbd"输出: "bb" 解法一:扩展中心,中心开花 我们知道回文串一定是对称的,所以我们可以每次循环选择一个中心,进行左右扩展,判断左右字符是否相等即可. 由于存在奇数的字符串和偶数的字符串,…

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…

Milk Patterns   Description Farmer John has noticed that the quality of milk given by his cows varies from day to day. On further investigation, he discovered that although he can't predict the quality of milk from one day to the next, there are some…

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…

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

def lengthOfLongestSubstring(s): res = 0 d = {} tmp = 0 start = 0 for i in range(len(s)): if s[i] in d and d[s[i]] >= start: start = d[s[i]] + 1 tmp = i - start + 1 d[s[i]] = i res = max(res, tmp) return res print(lengthOfLongestSubstring("abcdbe&…

class Solution { public: int lengthOfLongestSubstring(const std::string& s) { int max_length = 0; // 最大子字符串长度 int begin_index = 0;//最大子字符串的起始索引 int char_index[256]={0};//保存出现的字符串 for(int i = 0; i < s.size(); i++){ if (char_index[s[i]] == 0 || char_…

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…

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…

给定字符串 S,找出最长重复子串的长度.如果不存在重复子串就返回 0. 示例 1: 输入:"abcd" 输出:0 解释:没有重复子串. 示例 2: 输入:"abbaba" 输出:2 解释:最长的重复子串为 "ab" 和 "ba",每个出现 2 次. 示例 3: 输入:"aabcaabdaab" 输出:3 解释:最长的重复子串为 "aab",出现 3 次. 示例 4: 输入:"a…

给定字符串 S,找出最长重复子串的长度.如果不存在重复子串就返回 0. 示例 1: 输入:"abcd" 输出:0 解释:没有重复子串. 示例 2: 输入:"abbaba" 输出:2 解释:最长的重复子串为 "ab" 和 "ba",每个出现 2 次. 示例 3: 输入:"aabcaabdaab" 输出:3 解释:最长的重复子串为 "aab",出现 3 次. 示例 4: 输入:"a…

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…

每天 3 分钟,走上算法的逆袭之路. 前文合集 每日一道 LeetCode 前文合集 代码仓库 GitHub: https://github.com/meteor1993/LeetCode Gitee: https://gitee.com/inwsy/LeetCode 题目:最长回文子串 难度:中等 题目来源:https://leetcode-cn.com/problems/longest-palindromic-substring/ 给定一个字符串 s,找到 s 中最长的回文子串.你可以假设 …

题目描述: 回文串就是一个正读和反读都一样的字符串,比如“level”或者“noon”等等就是回文串.回文子串,顾名思义,即字符串中满足回文性质的子串.给出一个只由小写英文字符a,b,c...x,y,z组成的字符串,请输出其中最长的回文子串的长度. 输入: 输入包含多个测试用例,每组测试用例输入一行由小写英文字符a,b,c...x,y,z组成的字符串,字符串的长度不大于200000. 输出: 对于每组测试用例,输出一个整数,表示该组测试用例的字符串中所包含的的最长回文子串的长度. 样例输入: a…

题目链接: http://poj.org/problem?id=1743 题目大意:楼教主の男人八题orz.一篇钢琴谱,每个旋律的值都在1~88以内.琴谱的某段会变调,也就是说某段的数可以加减一个旋律范围的值.问这个谱子内最长不重叠的重复部分大小. 解题思路: 网上题解已经泛滥的题.很多细节都被先辈大神总结了. 在当年后缀数组还不是热门的时候,这题确实是神题. 首先对于旋律变调的处理: 比如123,123,ans=3. 变调之后:456,123,ans=0?不ans=3. 所以不能使用旋律的初始…

永恒的大牛,kuangbin,膜拜一下,Orz 链接:http://www.cnblogs.com/kuangbin/archive/2013/04/23/3039313.html Musical Theme Time Limit: 1000MS   Memory Limit: 30000K Total Submissions: 14334   Accepted: 4945 Description A musical melody is represented as a sequence of…