以下是一个使用WWW::RobotRules和LWP::UserAgent来下载文件的Perl程序:
#!/usr/bin/perl
use strict;
use warnings;
use WWW::RobotRules;
use LWP::UserAgent;
use HTTP::Request;
use HTTP::Response;
my $url http://www.people.com.cn/;
my $agent LW…
81.宏函数里面的不同的匹配规则需要使用分号隔开
// macros4.rs
//
// Execute rustlings hint macros4 or use the hint watch subcommand for a
// hint.// I AM NOT DONE#[rustfmt::skip]
macro_rules! my_macro {() > {println!("Check out my macro!");};($…
文章目录 一、题目二、题解 一、题目
1679. Max Number of K-Sum Pairs
You are given an integer array nums and an integer k.
In one operation, you can pick two numbers from the array whose sum equals k and remove them from the array.
Return the maximum num…