Can you solve this real interview question? Longest Nice Substring - A string s is nice if, for every letter of the alphabet that s contains, it appears both in uppercase and lowercase. For example, "abABB" is nice because 'A' and 'a' appear, and 'B' and
classSolution{publicintlengthOfLongestSubstring(String s){intans=0; Map<Character, Integer> map =newHashMap<>();for(intl=0, r =0; r < s.length(); ++r) {charc=s.charAt(r);if(map.containsKey(c) && l <= map.get(c)) { l = map.get(c) +1; }else{ ans = Math.max(r - ...
dp[i]的类型为int,判断比较的速度慢于boolean类型 初始的寻找最大回文子串方式是每次判断到长度变大,就调用一次s.substring(start,end)大大增加了开销,最后修改后决定采用保存开始位置start与长度len的方法。 在子串长度为1和2时不必要地对start与len赋值,现在加上了判断条件。 参考链接 http://articles.leetcode....
Given a strings, returnthe longestpalindromicsubstringins. Example 1: Input:s = "babad"Output:"bab"Explanation:"aba" is also a valid answer. Example 2: Input:s = "cbbd"Output:"bb" Constraints: 1 <= s.length <= 1000 sconsist of only digits and English letters. Accepted 3.8M Submission...
来自专栏 · LeetCode Description 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", as 'a'...
题目链接:https://leetcode.com/problems/longest-substring-with-at-least-k-repeating-characters/ 题目: T of a given string (consists of lowercase letters only) such that every character in T appears no less than k Example 1: Input: s = "aaabb", k = 3 Output: 3 The longest substring ...
原题链接 :leetcode.com/problems/l Given a string s, find the longest palindromic substring in s. You may assume that the maximum length of s is 1000. 给定字符串 s,找到 s 中最长的回文字符串,可以假定 s 的最大长度是 1000。 Example 1: Input: "babad" Output: "bab" Note: "aba" is...
1. 2. 3. 4. 5. 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l使distinct character <=k; 这种做法更新max只发生在超出限制的时候,有可能永远都没有超出限制,所以while loop完了之后要补上一个max的更新 1publicclassSolution {2publicintlengthOfLongestSubstringKDistinct(...
给定一个整数数组nums和一个整数k。当子数组中有 k 个奇数时,称之为nice。 要求返回nice子数组的个数。 栗1: 输入: nums = [1,1,2,1,1], k = 3 输出: 2 解释: 包含3 个奇数的子数组有:[1,1,2,1],[1,2,1,1] 栗2: 输入:nums = [2,4,6], k = 1 ...
public class Solution { public int lengthOfLongestSubstring(String s) { Map<Character, Character> map = new HashMap<Character, Character>(); int max = 0; int count = 0; int j = 0; for(int i = 0; i < s.length(); i++) { ...