Favorite_number7's blog

By Favorite_number7, history, 7 weeks ago, In English

Question A code( which got hacked) Qusetion B code(which got hacked) Above two are the hacked code which got hacked by a coder and below are his submission:- Question A code of coder who hacked Question B code of coder who hacked The only difference between two is only an addition of an extra case with wrong output in an if condition in both the questions.He did that and then hacked it from the original id of this fake coder.

 
 
 
 
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7 weeks ago, # |
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Nice technique

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7 weeks ago, # |
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Let them. There are no points for hacking in edu. They are just wasting their time.

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    7 weeks ago, # ^ |
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    I think if they can do it in this round they can also do these kinda stuff in other rounds where hacking is beneficial right? Cheaters must be punished!!

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      6 weeks ago, # ^ |
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      I've not done hacking in normal DIV 2 rounds but I guess you can only hack solutions of people in your room. So, what are the odds that people having two accounts (to do such things) land in the same room? Regarding punishment, I agree they should be punished if they're caught.

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7 weeks ago, # |
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Can you please tell me what hacking is and what happened? I did not understand

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    7 weeks ago, # ^ |
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    If you think others solution can get rejected for some particular valid case you can hack others solution by your valid input though his solution is pretest passed in div 2 rounds(in contest time) or accepted in div 3 / educational round(in 12 hours hacking phase)

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    7 weeks ago, # ^ |
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    When personA's code passes only the 'pretest' which is sometimes weak and then some other personB give test case which satisfies the question's constraint but for that test case personA's code give WA/TLE or some other error. This is known as hacking. The educational round has open hacking for 12 hr. which means you can see anyone's code and submit a test case to hack it. In other rounds(except edu) you can lock your solution during the contest, means now you cannot change your code to that question, and now you can look at other's code and submit test which you think cannot pass. if your hacking is successful you will get extra points and if unsuccessful, you will get negative points. There are no points for hacking in the educational round.

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      7 weeks ago, # ^ |
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      Then it's a nice thing only right? What's the issue

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        7 weeks ago, # ^ |
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        the issue is that open hacking start after the contest ends. how the two solutions are almost similar with only one line of difference, and he hacked the solution. The author of this blog is doubting that he has two id and used one id to hack others. This is edu round so he won't get the points, but he can get points in div2/div1.

        I saw the solutions, it seems that personA put one test case that will fail and is not in pretest and personB hacked for that test case.

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7 weeks ago, # |
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I like the fact in Question A he still has the comment. That's like Catch me if you can.

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7 weeks ago, # |
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How did he know that there would not be an internal test case where: T=1 and N=10?