Bug's blog

IOI Training contest #4

By Bug, 8 years ago, In English

Hi everybody :D
One week ago i've participated in the APIO2016 and my score was 61 and it's very bad , i felt like a looser so i stopped the IOI Training contests , but now i have pushed the reset button and returned to my normal mood :D
so i'm going to invite to participate in the IOI Training Contest #4 .
the problems are from USACO 2012 November Contest 2 gold 2 silver as usual .
it will be held in 17/May/2016 on 18 MSK .
the contest's duration is 5 hours as usual .
the contest's URL : https://www.hackerrank.com/ioi-training-contest-4 .
i will add the names of the top 3 competitors and the links to the tutorials to the post after the contest .
and let's discus here about the problems after the contest :D
hope u enjoy and learn :D
i've something i would like to talk about , why we don't make the IOI training contests UNRATED public contests just like the educational rounds ?? there are a lot of volunteers who can prepare new problems , we don't need very hard problems we only need useful problems , just think about it and write your opinions in the comments , ** thanks anyway **:D
NOTE the IOI Training contests are some contests that i prepare and participate on to train myself the others on such contests style before the IOI2016 .

** i have taken the photo from codechef :3 **
UPD: 15 minutes to go :)
the statements Links :
A B C D good luck :)
UPD: the contest has finished :)
1- Enchom , Daniar
3- tweety

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8 years ago, # |
  Vote: I like it +6 Vote: I do not like it

To have a round at the Codeforces 'contests' page it has to be verified by a lot of people and prepared really well and also has to use new problems. However, the Gym is exactly the place you're looking for if you want to make such contests on Codeforces. Having said that, I think Hackerrank is the better option simply because it supports partial scores which are essential for IOI problems.

Other than that, keep the contests coming :)

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    8 years ago, # ^ |
      Vote: I like it +6 Vote: I do not like it

    The problem is that uploading problems to Hackerrank really sucks. You have to upload tests one by one, and there's no support for checkers.

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      8 years ago, # ^ |
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      You can host contest in CF Gym. I made a contest in gym, and it's quite easy to add problems via Polygon. Most of the stuff is on CF blogs regarding how to use it. I took around 30-40 minutes to add 4-5 problems, checkers and stuff..

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        8 years ago, # ^ |
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        we know that , but we don't know how to make an ioi style contest subtasks or partial scoring .

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          8 years ago, # ^ |
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          For subtasks you could add problems as separate problems A1, A2 and so on. I don't know about partial scoring, but I believe it is possible to do that using Polygon(the recent Veeroute round and VK Cup Wild Card), maybe someone from headquarters(MikeMirzayanov, GlebsHP) can help.

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      8 years ago, # ^ |
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      Why do you need to upload the tests one by one? You can use testfmt or write a bash script of your own for formatting the data and zipping them. In this way the maximum time need for uploading a problem's data in HR is:

      Formatting Data ~ 20 seconds

      Zipping ~ 10 seconds

      Uploading ~ 1 minute

      Let us know if you can make more optimizations

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        8 years ago, # ^ |
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        Checker problem still unsolved though.

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        8 years ago, # ^ |
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        Thanks man :D , you've helped me a lot :)

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8 years ago, # |
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Auto comment: topic has been updated by Bug (previous revision, new revision, compare).

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8 years ago, # |
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Damn I almost missed it. No problem, I'll start now :D

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8 years ago, # |
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how to read an array of char ??

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    8 years ago, # ^ |
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    scanf("%s", ar_of_char);

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      8 years ago, # ^ |
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      i'm sorry my bad :p , have you noticed that the last problem is empty ??

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        8 years ago, # ^ |
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        See the update of this blog post.

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8 years ago, # |
← Rev. 2   Vote: I like it 0 Vote: I do not like it

Late by half an hour, challenge accepted!

P.S.

It seemed like the three problems except "Balanced Trees" were too easy. The "Balanced Trees" compensated quite nicely, but 5 hours was maybe too easy for the whole problemset. Goodjob nonetheless, looking forward to #5

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8 years ago, # |
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Late by 3 hours. :/

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8 years ago, # |
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nice problems , good luck with the last one my friends Bug tweety

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    8 years ago, # ^ |
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    i haven't tried with the last one :/ , i don't like the parentheses problems , so i solved the first 3 problems as fast as i can and gone out .

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      8 years ago, # ^ |
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      I see. That's why you picked 4 problems that all have parentheses. :P

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        8 years ago, # ^ |
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        All the problems in USACO 2012 November Contest have parentheses :/
        and i can't change the problems just because i don't like them .

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          8 years ago, # ^ |
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          parentheses , parentheses every where

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8 years ago, # |
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tutorial plz ?? I enjoyed solving the problems and I'm looking for the next contest, thanks

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    8 years ago, # ^ |
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    You can find them in the USACO website where the problems are taken from — A B C D

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