please add this test, i AC this problem in 0.812s, but my code answer to this code more than 1 second, in my computer, i think my computer is faster than the judge computer, sorry for my poor english.here is the test:
5000
4294967295 4294967295 4294967295 4294967295 (2500 times)
0 0 0 0  (2500 times)

Edited by moderator 11.12.2010 02:07

Your test was added. Your solution works 0.453 sec on it. :)