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Original text: . net core webapi jwt more refreshing authentication My way is not mainstream, but I can control it more flexibly. My favorite friend may as well take a moment to learn jwt authentication is divided into two parts. The first part is encryption and decryption. The second part is flexible application to middleware. My processing m ...

prim: First, build a tree with only one node, which can be any node in the original graph Using an edge to expand the tree requires that one vertex of the edge is in the tree and the other vertex is not in the tree, and the weight of the edge is the minimum. Repeat step 2 until all vertices are in the tree Look at the teacher's template ...

A.2295 Find how many pairs of prime numbers are equal to n. Violence. #include <bits/stdc++.h> using namespace std; int ss(int n) { int i=2,a=sqrt(n); for(;i<=a;i++) if(n%i==0) return 0; return 1; } int main() { int n; while(scanf("%d",&n),n) { int sum=0; for(int ...

Title Link: https://codeforces.com/contest/1157/problem/C2 Main idea: Give you n numbers. Each time you can choose to take it from the left or from the right, but each time you take it, you must be the last time big, and then ask you to find the longest ascending subsequence. Specific ideas: If the left and right endpoints are not equal, th ...

Title Link: https://nanti.jisuanke.com/t/39279 Given the sequence represented by n different numbers, two operations are defined: 1. Exchange the first half and the second half (if there are odd numbers, the middle doesn't matter). 2. Exchange each even bit with the number before it (if there are odd ones, the last one doesn't matter). Ask how ...

Dataset import HDFS Command line access to the dataset just uploaded to HDFS [hadoop@master hadoop-2.6.0]$ bin/hdfs dfs -ls /anagram/ MapReduce program compilation and operation: Step 1: in the Map stage, sort each word alphabetically to generate sortedWord, and then output the key/value key value pair (sortedWord,word). //Writ ...

There is an infinite tree with roots. Each node has N children. The distance between each child and the parent node is di. Find the number of nodes whose distance from the root node is less than or equal to X   Idea: pay attention to the observation data range, each d[i] is less than or equal to 100, so we can set dp[i] to represent the numbe ...

Although telegraf (v1.5.2) is easy to use, it can't help you to collect all the data you need by default, such as io data. By default, it only collects the relevant data such as io time, IOPs in process, weighted io time, read, write, etc. it can't collect the iops, await, svctm, util and other data of each disk. Recently, there is such a deman ...

Title Link: http://acm.hdu.edu.cn/showproblem.php?pid=1231 Problem Description: Given the sequence of K integers {N1, N2 , NK}, any continuous subsequence of which can be expressed as {Ni, Ni+1 , Nj}, where 1 < = I < = J < = K. The largest continuous subsequence is the element sum of all the continuous s ...

Import data (cluster as object) In Sqoop, the concept of "import" refers to the transfer of data from non big data cluster (RDBMS) to big data cluster (HDFS, HIVE, HBASE). It is called "import", that is, using the import keyword. 1 RDBMS to HDFS 1) make sure the Mysql service is turned on normally 2) create a new table i ...