Dear Artyom123 and  shishyando,

It's unfortunate that today's round went unrated but I wanted to take a moment to tell you how beautiful it was.

This is the kind of contest I love. Yes, red coders will say a contest should have x, y and z. But let me tell you what makes a contest great for average Joe like me:

1. Short and clear problem statements.
2. Easy to understand examples.
3. Gradual increase in difficulty. (B and C should not be light years apart in difficulty)
4. Strong pre-tests.
5. No insane implementations.

Your problems had every single quality and I was enjoying a contest after a very long time.

It's a shame it was not rated, but please come back again with more such rounds. We love you and wholeheartedly thank you for your efforts.

If there's anything I can do, please let me know.

Thank you.