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用线段树的同学看下这组数据(跪求)

Posted by hangweiqiang at 2012-09-07 23:35:36 on Problem 3368
6 1
0 1 2 3 1 4
1 6
0

答案应该是几??我觉得是2 但网上几乎所有的线段树代码输出的结果都是1
求神解释..........

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