Welcome to the first ever University Hill Coding Competition!

The contest organizer is Riolku.

The problem setters are noirsnow and RAINY.

Special thanks to envifly, Pendy, JoeyLu, hedgehog10243, yunz_qiao, and GarrisonQ for testing and feedback on the problems.

Before the contest date, you may wish to check out the tips and help pages.

This contest will consist of 5 problems, the difficulty of which will be around CCC Junior.

After the contest window begins, you may begin at any time. Your personal timer will start counting down, and you will be able to submit until 3 hours from when you started, or until the hard deadline (00:00 EST of February 20th), whichever comes first.

Here are the parameters of the contest:

• Number of problems: 5, full feedback (you will see the results of your submissions instantly).
• Each problem will be worth 15 marks, and may have partial marks in the form of subtasks.
• Scoreboard will be hidden until your window is over.
• Number of submissions allowed per problem: 50.
• Checkers: unless otherwise specified, standard.
• This contest is unrated.
• It is guaranteed that all problems will be solvable with C++.