思路: 尺取法. 循环i:1~26,分别计算恰好包含i种字母并且每种字母出现的次数大于等于k个的最长子串长度. 没法直接使用尺取法,因为不满足区间单调性,但是使用如上的方法却是可以的,因为子串中包含的字母种类数是满足区间单调性的. 实现: #include <bits/stdc++.h> using namespace std; class Solution { public: int longestSubstring(string s, int k) { int n = s.length()…
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<…
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"…
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"…
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"…
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"…
作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 题目地址: https://leetcode.com/problems/longest-substring-with-at-least-k-repeating-characters/description/ 题目描述: Find the length of the longest substring T of a given string (consists of lowercase…
只能说还是太菜,抄的网上大神的做法: idea: mask 的每一位代表该位字母够不够k次,够k次为0,不够为1 对于每一位将其视为起点,遍历至末尾,找到其最大满足子串T的下标max_idx,之后从max_idx+1开始遍历. 代码如下: public int longestSubstring(String s, int k) { if (k == 1) return s.length(); int res = 0, i = 0, n = s.length(); while (i + k <=…
题目如下: 解题思路:题目要找出一段连续的子串内所有字符出现的次数必须要大于k,因此出现次数小于k的字符就一定不能出现,所以就可以以这些字符作为分隔符分割成多个子串,然后继续对子串递归,找出符合条件的子串. 代码如下: class Solution(object): res = 0 def splitToSubs(self,subs,k): dic = {} for i in subs: if i not in dic: dic[i] = 1 else: dic[i] += 1 exclusiv…
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…
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…
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…
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 longest substring that contains only two unique characters. For example, given "abcbbbbcccbdddadacb", the longest substring that contains k unique character is "bcbbbbcccb". 分析: 用hashmap记录每个character从start到当前位置…
A simple variation to "Longest Substring with At Most Two Distinct Characters". A typical sliding window problem. class Solution { public: int lengthOfLongestSubstringKDistinct(string s, int k) { unordered_map<char, unsigned> hm; , start =…
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…
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. 我的做法:维护一个window,r移动到超出k distinct character限制是更新max,然后移动…
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. 给定一个字符串,找出包含最多k个不同字符的最长子字符串t的长度. 例如,给定s=“eceba”和k=2, T是…
This is a question needs pay for , I have no money to pay ,so just write some test case by myself. If you read this blog , and you hava pay for the LeetCode ,and you have test my program , please tell me that wheather is works, thank you. This idea i…
最后更新 二刷 08-Jan-2017 和76.159很像.. 2 pointers.. 通过判断是否每一次是有效读取来增减accumulator,从而判断当前是否符合规定,再来更新maxLength Time: O(n) Sapce : O(1) public class Solution { public int lengthOfLongestSubstringKDistinct(String s, int k) { if (s.length() == 0 || k == 0) return…
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…
原题链接在这里:https://leetcode.com/problems/longest-substring-with-at-most-two-distinct-characters/ 题目: 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"…
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:…
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…
