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这样就给A了，见下面mid在两边都取，线段树得开到5倍来

Posted by yuanchuanshun at 2010-09-26 20:56:41 on Problem 1151 
/*1151 Accepted 232K 0MS C++ 1864B 2010-09-26 20:53:30 */ 
//hdu能AC 在北大给WA了  看了DIs说要把
//静态线段树开到987，我便把 800改到 1200，居然给A了 
//联系到hdu里开到800才A，对线段树的领悟得多些，这里的代码是mid在两边都取，
//那么二分下去树的高度可想而知，并非以前的三倍那么简单；；学习了；
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