Google Code Jam

http://code.google.com/codejam/contest How it Works The contest rounds vary in duration, ranging from 1.5 hours to 3 hours, with the Qualification Round lasting 24 hours. Each contest will consist of three to six algorithmic problems, which will have two input/output sets, one small and one large. Small and large sets have different submission rules: Small Input/Output Sets: After downloading your small input file, you'll have four minutes to run your program on our input and submit the output (along with your source code). If you take too long or output the wrong answer, the attempt will be marked as incorrect. You may attempt to solve the input/output set again, but you need to download a new input file (which may have different test cases). You'll know immediately if your answer was correct. Large Input/Output Sets: After downloading the large input file, you have eight minutes to submit the output and your source code. There is only one input file, but you can submit as many times as you wish during the eight minutes. Your last submission counts as your final answer. You'll find out if your answer was correct after the contest. Uploading/Viewing Source Code: You must upload all source code used to solve each input/output set at the same time you are submitting your solution. For example, if you generate code automatically, submit the generator. You cannot submit your source code files after the contest. At the end of the contest, any user can view all of the source code submitted. Both the administrators and other contestants should be able to reproduce your output using your source code. See our rules for more details. If you have a slow network connection, you can pre-download encrypted large inputs during the contest. In order to decrypt the encrypted inputs, you will need to install decryption software. (See rules for more details.) Scoring For each input you solve correctly, you get the number of points indicated for that input. If there is a tie in points, the person with the lowest penalty time wins. Penalty Time = Total submission time of the last input you correctly solve (time is measured from start of contest) + four minutes for each incorrect small submission (only for problems you eventually solve)