Welcome to Computing Club's Welcome Contest!

This is a practice contest for you to get familiar with the contest and judging system. The problem setters for this contest are Zeyu and allentao.

You have \(120\) minutes to solve \(4\) problems with difficulty ranging from CCC J1 to S3. Each problem is worth a total of \(100\) points.

In case of ties, the sum of the time penalties will be used as tiebreaker for this contest.

Additional Information:

• Make sure you read all of the problems. There will be subtasks that allow you to get partial points, and every point counts.
• All problems have been tested with C++ and Python. The time limit for each problem will be at least 2x the reference solution's execution time.
• As with any contest, discussing contest problems before the contest end date is strictly prohibited. The only exception is the post-contest discussion channel in the club server, which can only be accessed once your 2-hour window is over.

Good luck!