Follow up for "Unique Paths":Now consider if some obstacles are added to the grids. How many unique paths would there be?
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其他好文 时间：
2014-07-10 11:10:26
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class Customer < ActiveRecord::Base has_many :ordersendclass Order < ActiveRecord::Base belongs_to :customerend如上代码两个model在做如下查询的时候：c = Customer.fir.....
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其他好文 时间：
2014-07-10 10:03:57
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循环同构的最小表示法。 1 #include 2 #include 3 4 #define MAXN 10005 5 #define MAXL 105 6 7 char map[MAXN][MAXL]; 8 char buf[MAXL]; 9 10 int Min_exp(char str[...
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其他好文 时间：
2014-07-07 23:06:44
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You are climbing a stair case. It takes n steps to reach to the top.Each time you can either climb 1 or 2 steps. In how many distinct ways can you cli...
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其他好文 时间：
2014-07-07 21:03:15
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http://acm.hdu.edu.cn/showproblem.php?pid=1232 1 #include 2 #include 3 #include 4 #include 5 using namespace std; 6 int n,m; 7 int bin[2005]; 8 in...
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2014-07-07 16:14:33
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Before I owned a pool I always thought that pool maintenance was going to be a real pain and troublesome. I had heard many horror stories from friends...
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其他好文 时间：
2014-06-30 21:58:20
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The following packages should be installed:python-ibusibusibus-clutteribus-gtkibus-m17n: input many non-latin charactersibus-pinyinibus-qt4ibus-tablei...
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系统相关 时间：
2014-06-30 13:14:49
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455
1 import java.awt.event.InputEvent; 2 3 import javax.swing.KeyStroke; 4 5 /** 6 * class KeyEvent: include many static key 7 * class KeyStroke: g...
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其他好文 时间：
2014-06-30 12:46:06
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JAVA大数....
How Many Fibs?
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)
Total Submission(s): 3906 Accepted Submission(s): 1545
Problem Descri...
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其他好文 时间：
2014-06-30 09:06:32
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160
