Category Archives: Problem setter

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RookieRank contest by HackerRank

I'm pleased to invite you, especially these ones of you who are starting with competitive programming, or like to practice with easy problems, to compete in a brand new contest RookieRank by HackerRank.

There will be 5 problems to solve, starting from very easy ones up to a few just slightly harder. I'm the author of 4 of them.

Moreover, there will be two separated leaderboards. One especially for all first time competitive programmers, i.e. these who are not listed on the Algorithms Leaderboard yet. The point is, that if you are just starting on HackerRank, you will compete with other people with similar experience.

The contest starts in 4 hours and you can register for it here.

Good Luck!


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My two problems in June Circuits


Another month, another Circuits contest. It's a long contest by HackerRank. The idea is that new problems go live each day.

The contest starts today, and it's available here:

This month, I'm the author of the approximate problem, called Covering Points, which will be available for solving as soon as the contest start. The second problem I created is the last one going live.

The tester for the whole contest is Bohdan (I_love_Tanya_Romanova), who helped a lot with creating the problems. It was nice to work together again :)

Good luck!

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My Problems in HackerEarth June Circuits

June Circuits is live for a week now. Today, the last and the hardest problem created by me went live. It is called Leaf Village and Democracy and the task is to handle a set of upcoming queries. I find the problem really good, especially for these of you looking for not so standard techniques.

There are still 2 days for solving any problem from the contest, so take your chance and do improve your total score :)


May Easy 2016 by HackerEarth with my problems

Hi all,

May Easy Contest by HackerEarth is taking place on May the 1st at 6:00pm CET. Contest duration is 3 hours.

I created all the problems in the contest and it was a lot of fun to do it.

There will be 6 problems to solve, all algorithmic ones, especially targeted for beginners. However, I'm pretty sure that any participant will find them interesting to solve, because only 5 of the problems have a standard partial scoring and there will be one approximate problem.

A little hint for you, be prepared to use some math in the contest :)

As the setter of all problems int the contest, I want to thank the problem tester and editorialist Bohdan (I_love_Tanya_Romanova) for working with me to prepare the contest. It was a pleasure as always!

As a tradition in Easy Contests, the top 5 beginners will receive HackerEarth T-shirts.

Good luck and see you on leaderboard!

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Regular Expresso 2 Contest

Hi guys,

My contest called Regular Expresso starts in just over 2 hours on HackerRank. The contest is all about regular expression and this is its second edition. It contains 8 problems of various difficulties and it will last 24 hours.

Top 10 participants will be awarded with cool T-shirts :)

You can register for the contest here: