先写一个五十分的思路吧 首先这道题有一个弱化版 "[POI2008]STA Station" 相当于$k=1$,于是就是一个非常简单的树形$dp$的$up\ \ and\ \ down$思想 但是我们现在要求的是这个柿子了 $$\sum_{j=1}^ndis(i,j)^k$$ 感觉这个东西很组合数学 ...
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其他好文 时间:
2019-01-01 21:06:25
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189
You are playing a simplified Pacman game. You start at the point (0, 0), and your destination is(target[0], target[1]). There are several ghosts on th ...
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其他好文 时间:
2019-01-01 17:29:48
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114
这里只贴index.php的代码, 深入了解的请访问 https://laravel-china.org/articles/10421/depth-mining-of-laravel-life-cycle ...
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其他好文 时间:
2019-01-01 16:15:49
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232
Problem: Given a set of words (without duplicates), find all word squares you can build from them. A sequence of words forms a valid word square if th ...
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其他好文 时间:
2019-01-01 14:05:31
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198
1.下载VMware Workstation 64版本 https://www.vmware.com/products/workstation-pro/workstation-pro-evaluation.html 2.下载CentOS-7-x86_64-DVD-1810 https://www.c ...
Given two arrays of length m and n with digits 0-9 representing two numbers. Create the maximum number of length k <= m + n from digits of the two. Th ...
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编程语言 时间:
2018-12-31 21:59:17
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123
There are N gas stations along a circular route, where the amount of gas at station i is gas[i]. You have a car with an unlimited gas tank and it cost ...
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2018-12-31 19:04:52
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147
Problem Description Arbitrage is the use of discrepancies in currency exchange rates to transform one unit of a currency into more than one unit of th ...
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编程语言 时间:
2018-12-31 17:27:58
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143
一、安装人人影视客户端, 二、查找片源: 三、打开wireshark,并选择侦听: 四、点击“下载”后,在wireshark中搜索http协议以及get命令,找到后复制uri全路径,去处结尾http1.0 五、打开nas中的“Download Station”,粘贴第四步中的uri,按“下载”按钮 ...
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2018-12-31 14:44:07
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673
Return all non-negative integers of length N such that the absolute difference between every two consecutive digits is K. Note that every number in th ...
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其他好文 时间:
2018-12-30 18:47:55
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164