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你的代码有问题哦！！！！路过的请回

Posted by carew at 2007-03-27 23:42:59 on Problem 2777
In Reply To:help，那位大牛帮忙看一下错在哪里了，编了很多测试数据都没问题 Posted by:decstery at 2006-03-29 21:26:03 
试下如下数据：
5 3 1000
P 1 5
C 2 3 2
P 1 5
C 2 4 3
P 1 5
C 3 5 2
P 1 5
C 2 3 1
P 1 5
C 1 3 2
P 1 5
C 4 4 3
P 1 5
最后应该是2，但你的是3，原因是[4,5]下面的[4,4],[5,5]还是3,1,一旦更新[4,4]
答案就会计了[5,5]的1，导致出错。
对于这类更新的问题，不知有什么好方法解决？
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