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Re:69s-->460ms......

Posted by dhx123 at 2009-08-13 16:39:53 on Problem 3277
In Reply To:69s-->460ms...... Posted by:userfriendly at 2009-03-20 21:06:25
> 重写以后弄40000的测试数据跑了69秒,搞了半天,最后在线段树insert方法里面加入了以下一句
> if(st[t*2+1]==st[t*2+2])
> 	st[t]=st[t*2+1];
> 就是把可以合并的区间合并起来,把时间效率从最坏提到平均。
> 再跑数据,460ms。。。。。。。。。。。。。
> 
> 感叹。
一定得合并,不然会超时的。

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