Detail of message

Online Judge

Problem Set

Authors

Online Contests

User

Web Board
Home Page
F.A.Qs
Statistical Charts

Current Contest
Past Contests
Scheduled Contests
Award Contest

69s-->460ms......

Posted by userfriendly at 2009-03-20 21:06:25 on Problem 3277
In Reply To:我想写个线段树把1151和这个一起A了，结果在这个上面TLE了。。。 :P Posted by:userfriendly at 2009-03-19 20:05:33

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。

Followed by:

Re:69s-->460ms...... (185) dhx123 2009-08-13 16:39:53

Post your reply here:

Home Page Go Back To top