Trapping Rain Water

Given n non-negative integers representing an elevation map where the width of each bar is 1, compute how much water it can trap after raining. https://leetcode.com/problems/trapping-rain-water/ Solution Double Link Code submit code class Solution: def trap(self, height: List[int]) -> int: if len(height)<3: return 0 ret = 0 ......

Private mailbox construction tutorial

Reason Recently, I have been configuring a second-level domain name, and then I tried to configure a private email for myself to use as a contact email for my personal blog. premise Pagoda Panel A server that can open 25 and other ports I heard that domestic servers have blocked these ports, I use Bricklayer, I just started testing my own server. T......

matplotlib

Data Github/YOUTUBE_studying draw import pandas as pd unrate = pd.read_csv('DATA.csv') unrate['DATE'] = pd.to_datetime(unrate['DATE']) # date format conversion print(unrate.head(12)) # drawing equipment import matplotlib.pyplot as plt #%matplotlib inline #Using the diffenent pyplot functions, we can create, customize, and display a plot . For example, we can use # plt.plot() # draw......

How do I apply for a eu.org domain name?

Reason Been looking for a free domain name and found this second-level domain name, but didn't figure it out at first! The application has been successful in the past month or so! This led to the idea of ​​writing an article to fill in the missing or outdated tutorials! This domain name has existed for a long time. The official name is EU.org, a free......

MySql Master-Slave Replication Configuration

recently added a few servers for fun, now there are two hosts are having a database on the thought of getting a master-slave replication to serve as a backup of data, how important this data is without me saying it! Master node configuration Operation on the host The master adds the following to the database configuration file and turns on binlog......