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这道题目千万注意！！！！！！！！

Posted by huzijin at 2010-07-25 11:37:10 on Problem 3277 
1. __int64 
2. 40000 条线段，离散化得到80000个点，所以，线段树区间数应开3*80000
3.区间用半开半闭，插入的时候只插双闭区间
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