Rules

Open Contest 2008 consists of 9 problems. Tourney will last for several days, from 3 May 2008 to 20 May 2008. Solutions for any problem can be sent for many times but not more than 256. Each solution will be executed with set of tests. Results received with your program will be processed with special Judge Program that will estimate the correctness/effectiveness of your solution. In some tasks you will receive some score for your solution. The score will be proportional to efficiency of the algorithm offered by you. Score will define your place in rating table for given problem. Only the best solution of each participant for given problem will be considered at rating tables. Current results and the information about all sent solutions will be automatically generated by Sphere Online Judge system and will be accessible for all participants of competition.

All contest problems will be split in two groups: classic and challenge. In the problems of type classic problem is considered solved if solution received status accepted. In the problems of type challenge problem is considered solved if your solution received nonzero score.

Any person that registered in system Sphere Online Judge can take part in contest. The solution of problems under several accounts is strictly forbidden and you can be banned for this!

The solution for problem can be write on any programming language that supported by Sphere Online Judge, only if it isn’t stipulated in a condition of a problem. The quantity of the sent solutions for a specific problem for given participant is limited by number 256 from above. All sent solutions more than 256 do not take into consideration at calculation of final statistics.
Score for problem X calculated by formula:
 For problem of type classic: table_score = nominal_task_score + t, where t = (0.110.01*rank) if rank < 61 and t = 0.5 otherwise. table_score – score in general statistics, nominal_task_score – nominal score for given problem (it is proportional to its difficulty), rank  your position in rank table for this problem.
 For problem of type challenge: table_score = (nominal_task_score*your_score)/max_score, where table_score  score in general statistics, nominal_task_score  nominal score for given problem (it is proportional to its difficulty), your_score – score received by you for given problem, max_score – maximum score for given problem. Solutions ordered by score and in the case of equal score, on the higher position will be participant, which sent solution earlier. Solutions, which have earned zero score, do not take into consideration at calculation of statistics.
The total score for participant sums of scores for individual problems. Total score approximated to the second sign after a comma.

Organizers of contest reserve the right to use all the submitted source codes for their own purpose (make it published after contest).

Organizers of contest reserve the right to change rules in case of need or the occurrences of new circumstances not considered in old rules.