1.暴力法: 本题让求给定字符串的最长的无重复字符的子串,首先想到暴力解法,穷举出字符串的所有子串,并判断每个子串是否是不重复子串,具体使用hashset或set判是否有重复字符;暴力法效率很差,时间O(n^3),空间O(n);参考代码如下: 1 class Solution { 2 public: ...
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其他好文 时间:
2020-01-07 13:27:01
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84
Description: Given an integer array arr and an integer k, modify the array by repeating it k times. For example, if arr = [1, 2] and k = 3 then the mo ...
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其他好文 时间:
2020-01-06 21:01:13
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108
原题链接在这里:https://leetcode.com/problems/longest-substring-with-at-least-k-repeating-characters/ 题目: Find the length of the longest substring T of a give ...
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其他好文 时间:
2020-01-06 15:00:54
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81
官档地址:https://docs.spring.io/spring/docs/5.1.4.RELEASE/spring-framework-reference/integration.html#scheduling spring里可以做两种方式的定时任务: 1. spring 自带的 定时任务 实 ...
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编程语言 时间:
2020-01-06 00:12:13
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64
linux线程调度策略 这是一篇关于线程调度的非常好的资料,翻译自 "shed" [TOC] 从Linux 2.6.23开始,默认的调度器为CFS,即"完全公平调度器"(Completely Fair Scheduler)。CFS调度器取代了之前的"O(1)"调度器。 Scheduling poli ...
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编程语言 时间:
2020-01-02 16:01:18
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113
Given a string, find the length of the longest substring without repeating characters. Example 1: Input: "abcabcbb"Output: 3 Explanation: The answer i ...
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其他好文 时间:
2019-12-30 09:34:59
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59
3. Longest Substring Without Repeating Characters Medium 7205424Add to ListShare Given a string, find the length of the longest substring without repe ...
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其他好文 时间:
2019-12-25 12:53:25
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75
Description Description Given a string, find length of the longest repeating subsequence such that the two subsequence don’t have same string characte ...
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其他好文 时间:
2019-12-21 22:26:52
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71
Given a string, find the first non-repeating character in it and return it's index. If it doesn't exist, return -1. Examples: Note: You may assume the ...
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其他好文 时间:
2019-12-13 23:28:11
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78
https://tech.meituan.com/2019/08/01/hadoop-yarn-scheduling-performance-optimization-practice.html 文章对性能优化的思路,如果评测性能,找到性能瓶颈,优化,优化效果评估,上线部署给出了很好的教科书式的案例 ...
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其他好文 时间:
2019-12-07 19:36:55
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107