Hello Codeforces!

I would like to invite you to participate in HackerEarth October Circuits. It's a long contest that will start on October 14, 21:00 IST. Contest will run for 8 days.

The problem set consists of 7 traditional algorithmic tasks and 1 approximate problem. For traditional algorithmic tasks, you will receive points for every test case your solution passes — so you can get some points with partial solutions as well. For the approximation task, your score depends on the best solution in the contest so far. Check contest page for more details about in-contest schedule and rules.

Xsquare, rivudas and I are the testers of the problem set you'll have to work on — thanks to satyaki3794, gamer12, harshil, tanmayc25 and PrinceOfPersia for preparing these tasks.

The contest will be rated. There will be some cool prizes for the top 5 competitors:
1. $100 Amazon gift card + HE t-shirt.
2. $75 Amazon gift card + HE t-shirt.
3. $50 Amazon gift card + HE t-shirt.
4. HE t-shirt.
5. HE t-shirt.