N-QueensThe 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, retu...
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其他好文 时间:
2015-07-14 20:24:49
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117
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-quee...
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2015-07-13 14:02:20
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114
def make_change(amount, coins): """Return a list of coins that sum to amount, preferring the smallest coins available and placing the smallest c...
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其他好文 时间:
2015-07-12 00:03:57
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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 ...
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其他好文 时间:
2015-06-27 09:50:33
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120
L51: 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-qu...
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其他好文 时间:
2015-06-09 17:32:04
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140
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...
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其他好文 时间:
2015-06-09 11:54:45
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125
// uva 10859 Placing Lampposts
// 树形dp
//
// 题目的意思是一个无向无环图中,有一些顶点和一些边
// 要在顶点上放置灯笼(灯笼可以照亮与它相邻接的点),
// 使得所有的边都能被灯笼照亮,其中可能有一些边被两个灯笼
// 照亮,则要求使得所有边都被灯笼照亮所需灯笼的最小值,
// 并且,此时边同时被两个灯笼照亮的数目应尽可能的多
//
// 思路是
//...
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其他好文 时间:
2015-05-28 09:37:26
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211
Please prove that you are the blog's owner by placing this code somewhere in a post:
TP:2AAB85C3
Place it somewhere where I can easily find it — you can remove the code in about 1-4 days....
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2015-04-27 16:54:00
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大致思路和大白书上的相同,不过感觉书上的决策部分讲解的并不是非常清楚,因此我在这里讲解一下我的决策思路。
首先,d(i,j)表示根节点为i的子树,当它的父节点为j(j=0或1)时的x的最小值(x的含义书上有讲解),要将该子树根节点和父节点相连的边的情况计算在内。接下来遍历森林中的每一棵树,对于每一棵树的根节点进行特别的处理,然后就对该树进行深度优先搜索dfs(i)。
...
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2015-04-07 21:37:44
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题目链接:n-queens
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
/**
*
The n-queens puzzle is the problem of placing n queens on an n×n chessboard such that no t...
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其他好文 时间:
2015-03-31 09:06:07
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156