leetcode5086:smallest-subsequence-of-distinct-characters

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[Swift]LeetCode1081. 不同字符的最小子序列 | Smallest Subsequence of Distinct Characters

★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★➤微信公众号:山青咏芝(shanqingyongzhi)➤博客园地址:山青咏芝(https://www.cnblogs.com/strengthen/)➤GitHub地址:https://github.com/strengthen/LeetCode➤原文地址:https://www.cnblogs.com/strengthen/p/10993157.html ➤如果链接不是山青咏芝的博客园地址,则可能是爬取作者的文…

LeetCode 1081. Smallest Subsequence of Distinct Characters

原题链接在这里:https://leetcode.com/problems/smallest-subsequence-of-distinct-characters/ 题目: Return the lexicographically smallest subsequence of text that contains all the distinct characters of text exactly once. Example 1: Input: "cdadabcc" Output:…

【leetcode】1081. Smallest Subsequence of Distinct Characters

题目如下: Return the lexicographically smallest subsequence of text that contains all the distinct characters of text exactly once. Example 1: Input: "cdadabcc" Output: "adbc" Example 2: Input: "abcd" Output: "abcd" Exa…

[LeetCode] Longest Substring with At Most K Distinct Characters 最多有K个不同字符的最长子串

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…

[LeetCode] Longest Substring with At Most Two Distinct Characters 最多有两个不同字符的最长子串

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…

Leetcode: Longest Substring with At Most K Distinct Characters && Summary: Window做法两种思路总结

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…

✡ leetcode 159. Longest Substring with At Most Two Distinct Characters 求两个字母组成的最大子串长度 --------- java

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. 给一个字符串,求这个字符串中,由两个字母组成的,连续的最长子串的长度. 虽然是hard,但是感觉并没有什么难度. 用ch1和pre…

LeetCode Longest Substring with At Most Two Distinct Characters

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"…

LeetCode "Longest Substring with At Most K Distinct Characters"

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 =…

[Locked] Longest Substring with At Most Two Distinct Characters

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…