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莫比乌斯反演笔记

minato_yukina 发布时间：2022-08-21 20:20:57 ，浏览量：4

对于一些函数,如果它本身的值难以求得,但对应约数容易求,那么可以考虑反演来简化运算. 本帖收录一些本人写过的反演题, 资料参考: OIWIKI 求解莫比乌斯函数的模板（利用线性筛）

int mu[maxn];int pr[maxn];ll sum[maxn];bool vis[maxn];
void getMu(int n){
	mu[1] = 1;int tot = 0;
	for(int i=2;ik;
		ll ans = 0;
		for(ll l=1,r=0;l


    
        
            
                
                
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	    基本
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	请求信息 : 2025-08-09 07:53:17 HTTP/2.0 GET : /home/article/detail/id/428882.html
运行时间 : 0.0497s ( Load:0.0118s Init:0.0015s Exec:0.0240s Template:0.0125s )
吞吐率 : 20.12req/s
内存开销 : 1,919.35 kb
查询信息 : 16 queries 0 writes 
文件加载 : 36
缓存信息 : 5 gets 0 writes 
配置加载 : 132
会话信息 : SESSION_ID=po83updeor6saf62vf6bu7vqi0
    
    
        
    
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Run Behavior\ReadHtmlCacheBehavior [ RunTime:0.000716s ]
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[ view_parse ] --START--
[ template_filter ] --START--
Run Behavior\ContentReplaceBehavior [ RunTime:0.000068s ]
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Run Behavior\ParseTemplateBehavior [ RunTime:0.009551s ]
[ view_parse ] --END-- [ RunTime:0.009582s ]
[ view_filter ] --START--
Run Behavior\WriteHtmlCacheBehavior [ RunTime:0.000431s ]
[ view_filter ] --END-- [ RunTime:0.000472s ]
[ app_end ] --START--
    
    
        
    
	[2] session_save_path(): open_basedir restriction in effect. File(/var/lib/php/session) is not within the allowed path(s): (/www/wwwroot/www.chaojiit.com/:/tmp/) /www/wwwroot/www.chaojiit.com/ThinkPHP/Common/functions.php 第 1239 行.
[8192] Array and string offset access syntax with curly braces is deprecated /www/wwwroot/www.chaojiit.com/ThinkPHP/Library/Think/Cache/Driver/File.class.php 第 59 行.
[8] Undefined variable: user /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 37 行.
[8] Undefined variable: user /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 98 行.
[8] Trying to access array offset on value of type null /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 98 行.
[8] Undefined variable: user /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 99 行.
[8] Trying to access array offset on value of type null /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 99 行.
[8] Undefined variable: pinglun_list /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 108 行.
    
    
        
    
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SHOW COLUMNS FROM `article_content` [ RunTime:0.0005s ]
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0.0497s