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poj 2528 Mayor's posters
Mayor's posters Description The citizens of Bytetown, AB, could not stand that the candidates in the mayoral election campaign have been placing their ...
分类:其他好文   时间:2016-06-30 21:33:02    阅读次数:139
LeetCode:N-Queens
N-Queens Total Accepted: 55554 Total Submissions: 212496 Difficulty: Hard The n-queens puzzle is the problem of placing n queens on an n×n chessboard such that no two queens...
分类:其他好文   时间:2016-06-12 02:48:29    阅读次数:179
LightOj 1230 Placing Lampposts(树形DP)
题意:给定一个森林。每个节点上安装一个灯可以覆盖与该节点相连的所有边。选择最少的节点数num覆盖所有的边。在num最小的前提下,合理放置num个灯使得被两个灯覆盖的边最多? 思路:F[i][0]代表没放灯,F[i][1]代表放了灯,G[i]类似。 ...
分类:其他好文   时间:2016-06-02 19:35:37    阅读次数:146
【一天一道LeetCode】#51. N-Queens
一天一道LeetCode系列(一)题目 The n-queens puzzle is the problem of placing n queens on an n×n chessboard such that no two queens attack each other. Given an integer n, return all distinct solutions to...
分类:其他好文   时间:2016-05-18 18:31:33    阅读次数:142
LeetCode 51. N-Queens
The n-queens puzzle is the problem of placing n queens on an n×n chessboard such that no two queens attack each other. Given an integer n, return all distinct solutions to the n-queens puzzle. Ea...
分类:其他好文   时间:2016-05-13 02:08:03    阅读次数:146
UVA 10859 Placing Lampposts(树形DP)
题意:        给定一张有向无环图,每个节点视作一个路口,每条边视作路,要求挑选一些节点放置路灯,使每条路都能被路灯照到,且使用的路灯数最少,如若存在使用相同路灯数的情况,则使得能被两盏路灯照到的路的数量尽量多。 解题:       可以将此问题提炼一下,就是使用最少的路灯照亮所有的路,使得被两盏路灯照亮的路尽量多,也就是使被一盏路灯照亮的路尽量少。那么问题可以转换为,使用最少...
分类:其他好文   时间:2016-05-12 15:40:05    阅读次数:121
51. N-Queens
The n-queens puzzle is the problem of placing n queens on an n×n chessboard such that no two queens attack each other. Given an integer n, return all ...
分类:其他好文   时间:2016-05-10 12:49:48    阅读次数:164
UVa10859 放置街灯
Placing Lampposts As a part of the mission ?Beautification of Dhaka City?, the government has decided to replace all the old lampposts with new expens ...
分类:其他好文   时间:2016-04-23 11:42:01    阅读次数:232
N-Queens N皇后问题
题目:The n-queens puzzle is the problem of placing n queens on an n×n chessboard such that no two queens attack each other. (LeetCode 51) Given an integ ...
分类:其他好文   时间:2016-04-04 19:33:14    阅读次数:147
UVA 10859 - Placing Lampposts 树形DP、取双优值
Placing Lampposts As a part of the mission ‘Beauti?cation of Dhaka City’, the government has decided to replace all theold lampposts with new expensiv ...
分类:其他好文   时间:2016-04-04 19:24:02    阅读次数:191
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