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恨7不成妻数位dp (计数转求和)

先求一个导发布时间：2022-05-02 19:44:45 ，浏览量：5

题目题意: 求所有满足数位中不存在7、数位和不是7的倍数、数字本身不是7的倍数的数的平方和。思路: 难就难在平方和。核心思路是这样的，由于递归，假设第i位之后的平方和以及统计完了。那么我们可以观察到一些规律。在这里插入图片描述

时间复杂度: O(能过) 代码:

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#define OldTomato ios::sync_with_stdio(false),cin.tie(nullptr),cout.tie(nullptr)
#define fir(i,a,b) for(int i=a;i


    
        
            
                
                
                    先求一个导
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	请求信息 : 2025-08-09 07:56:54 HTTP/2.0 GET : /home/article/detail/id/429048.html
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	[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.
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0.0486s

恨7不成妻 数位dp (计数转求和)

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恨7不成妻数位dp (计数转求和)