JavaNote
Length
For String, ie String a, a.length()
For Array, ie int[] n , n.length
HashMap HashSet
用哈希往往耗时更长
Set就明显小于HashMap in runtime and space12345678910
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Ubuntu_Disk_Space_Extend
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Ref Info
https://blog.csdn.net/b7376811/article/details/94475133
https://gparted.org/download.php
build_personal_academic_page
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Experience
如何快速搭建个人学术页面Jekyll Academic + Github Pages本文受到个人网站搭建的启发
首先你需要有：
本地git
GitHub账号
使用本方法可以避免本地hexo、hugo安装过程中遇到的各种问题(有些甚至找不到缘由或者没有人给出解决方案),此方法不限于创建学术界面，创
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leetcode155
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leetcode
Design a stack that supports push, pop, top, and retrieving the minimum element in constant time.
push(x) – Push element x onto stack.pop() – Removes
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leetcode152 Maximum Product Subarray
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leetcode
Given an integer array nums, find the contiguous subarray within an array (containing at least one number) which has the largest product.
Example 1:
I
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leetcode150 Evaluate Reverse Polish Notation
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leetcode
Evaluate the value of an arithmetic expression in Reverse Polish Notation.
Valid operators are +, -, *, /. Each operand may be an integer or another e
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leetcode149 Max Points on a Line
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leetcode
Given n points on a 2D plane, find the maximum number of points that lie on the same straight line.
Example 1:
Input: [[1,1],[2,2],[3,3]]Output: 3Expl
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leetcode140 Word Break II
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leetcode
Given a non-empty string s and a dictionary wordDict containing a list of non-empty words, add spaces in s to construct a sentence where each word is
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leetcode139 Word Break
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leetcode
Given a non-empty string s and a dictionary wordDict containing a list of non-empty words, determine if s can be segmented into a space-separated sequ
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