159. Longest Substring with At Most Two Distinct Characters
时间:2020-05-30
本文章向大家介绍159. Longest Substring with At Most Two Distinct Characters,主要包括159. Longest Substring with At Most Two Distinct Characters使用实例、应用技巧、基本知识点总结和需要注意事项,具有一定的参考价值,需要的朋友可以参考一下。
package LeetCode_159 /** * 159. Longest Substring with At Most Two Distinct Characters * (Locked by leetcode) * https://www.lintcode.com/problem/longest-substring-with-at-most-two-distinct-characters/description * * 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: t is "ece" which its length is 3. Example 2: Input: "ccaabbb" Output: 5 Explanation: t is "aabbb" which its length is 5. * */ class Solution { /* Sliding Window solution. Time complexity:O(n), Space complexity:O(256); * when moving i: * occMap[s[i]]-- * if (occMap[s[i]]==0){ * counter-- * } * * when moving j: * if (occMap[s[j]])==0{ * counter++ * } * occMap[s[j]]++ * * bestLength = max(bestLength, length of current window)=>max(bestLength, j-i+1) * * counter: how many distinct character we have * * valid window condition: window contains <= 2 distinct characters = window desirable * when move i: when the window becomes not desirable (counter>2) * when move j: as long as counter<=2 (as long as window desirable) * * Sliding Window Tech important point: * 1.when to move i, and what have to do when moving i; * 2.when to move j, and what have to do when moving j; * 3.when to update the goal; * */ fun lengthOfLongestSubstringTwoDistinct(s: String): Int { val occMap = IntArray(256) var i = 0 var j = 0 var counter = 0 var bestLength = 0 while (j < s.length) { if (occMap[s[j].toInt()] == 0) { counter++ } occMap[s[j].toInt()]++ while (counter > 2) { occMap[s[i].toInt()]-- if (occMap[s[i].toInt()] == 0) { counter-- } i++ } bestLength = Math.max(bestLength, j - i + 1) j++ } //print(bestLength) return bestLength } }
原文地址:https://www.cnblogs.com/johnnyzhao/p/12992129.html
- Swift 面向对象解析(二)
- 谈谈基于OAuth 2.0的第三方认证 [中篇]
- [ASP.NET Web API]如何Host定义在独立程序集中的Controller
- ASP.NET Web API自身对CORS的支持: EnableCorsAttribute特性背后的故事
- 【黑客解析】黑客是如何实现数据库勒索的 ?
- 直播回看:高可用架构入门 —— 腾讯云架构演变及经验
- 【腾讯云的1001种玩法】十分钟轻松搞定云架构之一 :从上云开始
- 【腾讯云的1001种玩法】十分钟轻松搞定云架构之二:更好的网络
- 【腾讯云的1001种玩法】十分钟轻松搞定云架构之三:更大的存储
- Socket学习总结系列(一) -- IM & Socket
- 【腾讯云的1001种玩法】十分钟轻松搞定云架构 之四:替你分心的负载均衡
- 【腾讯云的1001种玩法】十分钟搞定云架构 · 什么是Bucket、什么是Object
- 【腾讯云的1001种玩法】十分钟轻松搞定云架构 · 负载均衡的最佳实践
- 【黑客浅析】像黑客一样思考
- JavaScript 教程
- JavaScript 编辑工具
- JavaScript 与HTML
- JavaScript 与Java
- JavaScript 数据结构
- JavaScript 基本数据类型
- JavaScript 特殊数据类型
- JavaScript 运算符
- JavaScript typeof 运算符
- JavaScript 表达式
- JavaScript 类型转换
- JavaScript 基本语法
- JavaScript 注释
- Javascript 基本处理流程
- Javascript 选择结构
- Javascript if 语句
- Javascript if 语句的嵌套
- Javascript switch 语句
- Javascript 循环结构
- Javascript 循环结构实例
- Javascript 跳转语句
- Javascript 控制语句总结
- Javascript 函数介绍
- Javascript 函数的定义
- Javascript 函数调用
- Javascript 几种特殊的函数
- JavaScript 内置函数简介
- Javascript eval() 函数
- Javascript isFinite() 函数
- Javascript isNaN() 函数
- parseInt() 与 parseFloat()
- escape() 与 unescape()
- Javascript 字符串介绍
- Javascript length属性
- javascript 字符串函数
- Javascript 日期对象简介
- Javascript 日期对象用途
- Date 对象属性和方法
- Javascript 数组是什么
- Javascript 创建数组
- Javascript 数组赋值与取值
- Javascript 数组属性和方法