[code deleted by moderator]

This code was accepted on Sunday contest, but it works much longer than 0.5 sec. on the test
100000
+ 2
+ 4
+ 6
...
+ 100000
- 100000
...
- 6
- 4
- 2

Please add this test and rejudge all the submissions.

Edited by moderator 20.09.2011 02:32