July 2009 (Contest V)

Name	Code	Successful Submissions	Accuracy
Lights Off	E2	75	18.69
Quadratic Equations	E4	59	5.25
The White Knight	E1	202	19.44
Buggy algorithm	E5	40	19.82
Johny the farmer	E3	42	3.30
Lights Off, Revisited!	EX	54	72.87
Sums in a cuboid	CUBESUM	167	28.21

Updates:

At the end of the contest, the challenge problem (tie breaker) will be rejudged with new test data. Check out our blog post on this for more info
Comments have been disabled for all the problems. If you have any issues with the problem statement or any other thing, post in the forums.
The constraints for the problem Johnny, the farmer have been changed. Please read the updated constraints.
The problem EX is being rejudged.
The contest is now over. The problem EX is being rejudged. The final standings will be declared shortly.
July 14th - We are rejuding again. All submissions are now publically available. You can click on a problem, all submissions, view submission to see. We will announce the winners by tomorrow.
Julty 15th - Winners have been announced. We will be getting in touch with everyone over the next few days regarding prizes.

Rules:

Contest problems will become visible on July 1st 15:00 IST.
The contest will consist of 6-8 problems of varying difficulty.
You will receive one point for solving a problem (passing all test cases - no partial credit), regardless of the level of difficulty of that problem.
You can submit solutions as many times as you'd like, there are no penalties for incorrect submissions.
Each contest will have one min/max tie breaker problem, where the best solution will receive one point and all other solutions will receive a fraction based how close they come to the best solution.
In the unlikely case of an overall tie (including the same score on the tie-breaker) a winner will be randomly chosen from the top scorers.