随笔分类 -  树状数组

poj2352 Stars【树状数组】
摘要：Astronomers often examine star maps where stars are represented by points on a plane and each star has Cartesian coordinates. Let the ... 阅读全文
posted @ 2018-11-05 21:53 浮生惘语 阅读(165) 评论(0) 推荐(0)
树状数组入门
摘要：前言 最近初学树状数组，原理还不是太理解，等自己什么时候完全理解了再自己总结一番。掌握树状数组~彻底入门先贴一下树状数组的模板代码：int lowbit(int i){ return i & -i;//或者是return i-(i&(i-1));表... 阅读全文
posted @ 2018-11-05 11:12 浮生惘语 阅读(156) 评论(0) 推荐(0)