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!