在数字时代,CAPTCHA(Completely Automated Public Turing tests to tell Computers and Humans Apart,完全自动区分计算机和人类的公共图灵测试)作为一项重要的安全措施,用于保护网站免受自动机器人的攻击。然而&#…
1)RabbitMQ启用MQTT插件
rootmq:/# rabbitmq-plugins enable rabbitmq_mqtt
Enabling plugins on node rabbitmq:
rabbitmq_mqtt
The following plugins have been configured:rabbitmq_managementrabbitmq_management_agentrabbitmq_mqttrabbitmq_web_dispatch
Ap…
排序贪心
区间贪心
删数贪心
统计二进制下有多少1
int Getbit_1(int n){int cnt0;while(n){nn&(n-1);cnt;}return cnt;
}暴力加一维前缀和优化
#include <iostream>
#include <climits>
using namespace std;
#define int long long
const int N2e510;
in…