harshil's blog

April Hack 101 + 800$ + Cool Tshirts + Awesome Problem Set

By harshil, history, 8 years ago, In English

Hi Codeforces !!!

I am glad to announce HackerRank 101 Hack — 36th Edition. The contest will be held on 16:30 UTC Wednesday, April 20 2016. Contestants will be given 5 problems and 2 hours to solve them. You can sign up for the contest here.The prizes for this contest are:

First Place: $300 Amazon Gift Card
Second Place: $200 Amazon Gift Card
Third Place: $100 Amazon Gift Card
Fourth Place: $50 Amazon Gift Card
Fifth Place: $50 Amazon Gift Card

Coders ranked 6-20: HackerRank T-shirt

This contest is rated for all users.

101 Hack problem set is prepared by me (harshil) and ma5termind is tested by wanbo. I would like to thank HackerRank for helping us hosting and preparing this round.

I am sure that everyone will find this round interesting and challenging. Each problem will be starring Shil and you have to help him solving some simple but interesting tasks.

Hope to see you participating.

Good Luck & Have Fun

  • Vote: I like it
  • +99
  • Vote: I do not like it

»
8 years ago, # |
  Vote: I like it 0 Vote: I do not like it

Auto comment: topic has been updated by harshil (previous revision, new revision, compare).

→ Reply
»
8 years ago, # |
  Vote: I like it +8 Vote: I do not like it

Thank you Shil. The prize is attractive.

→ Reply
»
8 years ago, # |
  Vote: I like it 0 Vote: I do not like it

Auto comment: topic has been updated by harshil (previous revision, new revision, compare).

→ Reply
»
8 years ago, # |
  Vote: I like it 0 Vote: I do not like it

Another ma5termind round :) :). Your last round Hourank was amazing. I hope another good problem set from you.

→ Reply
  • »
    »
    8 years ago, # ^ |
      Vote: I like it +44 Vote: I do not like it

    I agree, his last round was nice.

    By the way, I hope that there will be no problem with adding 5 numbers, like 300 + 200 + 100 + 50 + 50 = 800.

    → Reply
    • »
      »
      »
      8 years ago, # ^ |
        Vote: I like it 0 Vote: I do not like it

      let me ask them.

      → Reply
    • »
      »
      »
      8 years ago, # ^ |
        Vote: I like it 0 Vote: I do not like it

      hi Errichto

      I guess it also includes 20 t-shirts cost.

      → Reply
      • »
        »
        »
        »
        8 years ago, # ^ |
          Vote: I like it -9 Vote: I do not like it

        Then the blog title is wrong. But it isn't that important anyway :)

        → Reply
    • »
      »
      »
      8 years ago, # ^ |
        Vote: I like it +19 Vote: I do not like it

      How many ways to change two characters in "300 + 200 + 100 + 50 + 50 = 800" to make the equation holds? This problem worth $100 which is hidden above.

      → Reply
»
8 years ago, # |
  Vote: I like it +7 Vote: I do not like it

Is Hackerrank going to always give such prizes for 101Hack in future?

→ Reply
  • »
    »
    8 years ago, # ^ |
      Vote: I like it 0 Vote: I do not like it

    no

    → Reply
  • »
    »
    8 years ago, # ^ |
      Vote: I like it +32 Vote: I do not like it

    I will try to apply these kind of prizes regularly, but we need to see how's the prize motivates the participants.

    → Reply
»
8 years ago, # |
  Vote: I like it +11 Vote: I do not like it

Cant view problems :(

→ Reply
»
8 years ago, # |
← Rev. 2   Vote: I like it +7 Vote: I do not like it

Problem's B statement was a shit!

I wasted plenty of time trying to understand the statement!

Then, I opened discussion and saw, that guys have the same trouble.

I don't understand only one thing: why you were not able to find this bug for such a long period of time?

Despite problem's B statement the contest is nice.

→ Reply
  • »
    »
    8 years ago, # ^ |
    ← Rev. 5   Vote: I like it +5 Vote: I do not like it

    We are really really sorry. We did not have author of that problem present at that time. So, tester changed the statement and meanwhile author came and he also changed it too but wrongly. So, this way it all went. I again apologise on our part. Apart from this, i wish you guys have enjoyed this contest.

    → Reply
    • »
      »
      »
      8 years ago, # ^ |
      ← Rev. 2   Vote: I like it +1 Vote: I do not like it

      Some nonsense

      → Reply
      • »
        »
        »
        »
        8 years ago, # ^ |
          Vote: I like it +24 Vote: I do not like it

        They are obviously not equivalent because . So, and .

        → Reply
        • »
          »
          »
          »
          »
          8 years ago, # ^ |
            Vote: I like it +1 Vote: I do not like it

          XD

          → Reply
        • »
          »
          »
          »
          »
          8 years ago, # ^ |
            Vote: I like it +37 Vote: I do not like it

          I simply looked at the problem and comprehended what it asked of me (each diagonal contains smaller elements than the following one) without actually paying attention to the formula :D

          → Reply
          • »
            »
            »
            »
            »
            »
            8 years ago, # ^ |
              Vote: I like it +3 Vote: I do not like it

            When I was testing it I also comprehended the problem the way you were, but it turned out to be a big mistake even I tried to prepare the contest as careful as possible. Hope you can understand. We will improve next time.

            → Reply
      • »
        »
        »
        »
        8 years ago, # ^ |
          Vote: I like it +3 Vote: I do not like it

        We are sorry about the suck response after problem arose. You will have better experience in the upcoming contests, we are growing, and as a tester, I feel awful to see these kind of stupid bug.

        → Reply
»
8 years ago, # |
← Rev. 2   Vote: I like it +5 Vote: I do not like it

Hardest problem: Trying to understand the description of Super Humble Matrix (problem B) before the clarification.

It took me, like, 20–30 minutes just for reading and understanding the description @_@

→ Reply
»
8 years ago, # |
  Vote: I like it 0 Vote: I do not like it

How to solve the third Problem?

→ Reply
  • »
    »
    8 years ago, # ^ |
      Vote: I like it 0 Vote: I do not like it

    You can check the editorial for that problem. It is already published here

    → Reply
»
8 years ago, # |
  Vote: I like it +22 Vote: I do not like it

Screencast with rap

→ Reply
»
8 years ago, # |
  Vote: I like it +10 Vote: I do not like it

Contest is not rated?

→ Reply