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Author: Simo

Algorithm – Quicksort: iteration or recursive

I learned about quick sorting and how to implement it in recursive and iterative methods.
In iterative methods:

>The range (0 … N) Push onto the stack
>Use a pivot table to partition a given

October 16, 2021By Simo MathematicsLeave a Comment

HDU-1719 Friend Mathematics Derivation

Friend HDU-1719 Friend number are defined recursively as follows.
(1) numbers 1 and 2 are friend number;
(2) if a and b are friend numbers, so is ab+a +b;
(3) only the numbers defined in (1

October 16, 2021By Simo Mathematics derivation, Friend, HDU, mathematicsLeave a Comment

Linux temperature – 4- file link

ln can link files, similar to windows shortcuts

ln -s zxw.txt z.lnk

Delete the original file

rm zxw.txt After the source file is deleted, as shown in the figure below, the path s

October 16, 2021By Simo Linux Files, Links, linux, TemperatureLeave a Comment

OSX – How to run ubuntu server headless using Parallels Desktop?

Running virtual machines “headless” (each virtual machine is not visible on the host) is a good feature of VirtualBox. How to use Parallels Desktop on Mac OS X? Make sure Parallels Desktop is no

October 16, 2021By Simo Macos desktop, Headless, how to use, OSX, Parallels, run, server, UbuntuLeave a Comment

Install the RPM package in the off-network state

Experimental platform: CentOS7

Experimental analysis: The source rpm package in the Linux system is stored in the official yum warehouse, usually We can call the rpm package in the yum wareho

October 16, 2021By Simo Linux Broken, installation, mesh, package, rpm, stateLeave a Comment

[Data Structure] Automatic machine for multiple target strings matching

Based on the number of tries, the suffix automaton introduces the parent node parent, prefix nxt, subsequent child[], matching The number of words cnt, where child[i] is the node to jump to when th

October 16, 2021By Simo Data Structure automaton, Data Structure, for, matching, multiple, search, strings, targetsLeave a Comment

How to force homebrew to recompile?

I am trying to install wxWidgets on Mac OS X 10.9. It is already installed, but I have the problem described here. Someone suggested adding ENV.append_to_cflags “-stdlib=libc”. I don’t have it, but

October 16, 2021By Simo Macos compile, Homebrew, How to force, re-Leave a Comment

OSX – ITERM VIM Colorscheme does not work

When I run vim from the command line in iTerm, syntax highlighting does not seem to work locally.

In vim for example, I installed a nice colorscheme, which works quite well in MacVim, but it

October 16, 2021By Simo Macos Colorscheme, ITERM, OSX, VIM, WorkLeave a Comment

Homebrew routine use tutorial

homebrew is a package management tool under osx, which can easily manage all kinds of packages. The official definition is

execute The following command:

/usr/bin/ruby -e “$(curl -fsSL

October 16, 2021By Simo Macos General, Homebrew, tutorial, UsedLeave a Comment

Solve SELINUX can’t start after the Apache changes the port

systemctl start httpd # After changing the default port of Apache to 90, it prompts failure when starting Apache

< span style="font-size: 16px;">systemctl status httpd # View the status of Ap

October 16, 2021By Simo Linux apache, change, Leading, port, problem, SELINUX, solve, startup, UnableLeave a Comment

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