这里回溯算法还要好好研究一下试探一个位置是否有效，如果有效，试探下一个位置（DFS），如果无效则回退1.定义一个解空间，存放一个解的空间2.DFS(暂且认为是DFS)这里N皇后用的是递归+回溯实现的 1 package com.gxf.backtracking; 2 3 /** 4 * n皇后问.....
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编程语言 时间：
2014-11-24 22:03:28
阅读次数：
204
这是一道经典的NP问题，采用回朔法
i从1开始，
先加入1，再加入2 temp=[1,2]
然后去掉2 加3 temp=[1,3]
然后去掉3 加4 temp=[1,4]
然后去掉4 i=5不合法了 结束for循环
然后去掉1
返回到i=1，然后i++...
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其他好文 时间：
2014-11-04 11:14:38
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187
1. ConceptBacktracking is a refinement of the brute force approach, which systematically searches for a solution to a problem among all available opti...
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其他好文 时间：
2014-09-02 07:56:04
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325
Problem A - No Tipping
As Archimedes famously observed, if you put an object on a lever arm,it will exert a twisting force around the lever's fulcrum. Thistwisting is called torque and is equal to th...
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其他好文 时间：
2014-07-19 23:13:39
阅读次数：
343
题目如下：
Firetruck
The Center City fire department collaborates with the transportation department to maintain maps of the city which reflects the current status of the city street...
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其他好文 时间：
2014-07-19 02:47:26
阅读次数：
193
题目如下：
Graph Coloring
You are to write a program that tries to find an optimal coloring for agiven graph. Colors are applied to the nodes of the graph and the only availablec...
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其他好文 时间：
2014-07-19 02:35:06
阅读次数：
210
题目如下：
Bandwidth
Given a graph (V,E) where V is a set of nodes and E is a set of arcsin VxV, and an
ordering on the elements in V, then the bandwidth of a node
v is defined as...
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其他好文 时间：
2014-07-19 02:26:15
阅读次数：
206
题目如下：
The Sultan's Successors
The Sultan of Nubia has no children, so she has decided that thecountry will be split into up to
k separate parts on her death andeach part wi...
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其他好文 时间：
2014-07-18 22:00:59
阅读次数：
310
题目如下：
Getting in Line
Computer networking requires that the computers in the network be linked.
This problem considers a ``linear" network in which the computers are chaine...
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其他好文 时间：
2014-07-16 17:11:41
阅读次数：
245
题目如下：
Don't Get Rooked
In chess, the rook is a piece that can move any number of squaresvertically or horizontally. In this problem we will consider smallchess boards (at most ...
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其他好文 时间：
2014-07-16 10:16:07
阅读次数：
254
