> I use the segment tree,but I can't find anything wrong...
> Could you please give me some tests so that I can find out my program's problem?
> Thank you.

But now I got WA #5,and I have considered the following tests:
6
+ 9
- 3
- 3
+ 3
+ 3
+ 3
And I think the answer is:
9
9
9
9
9
3
But I still WA #5,Could someone can give me some hints or some tests?

Edited by author 20.06.2013 10:52

Edited by author 20.06.2013 10:52

6
+ 9
- 3
- 3
+ 3
+ 3
+ 3

It`s impossible. Read the task again.

Edited by author 15.08.2013 13:41

May be you don't use Long long