upen_g's blog

By upen_g, 7 years ago, In English,

Hello everyone.. I want to know about hacking a solution. I am here for learn something that's why i want to know about hacking of a solution.Please anyone tell me in briefly about generating testcase and about hacking of another's solution.

Thanks in advance.

 
 
 
 
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7 years ago, # |
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 Just Hack It!

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7 years ago, # |
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Комментарий удален по причине нарушения правил Codeforces

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7 years ago, # |
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after you pass the pretest , return to the dashbord and lock your code. then go to the rooms and double click to the solution of your roommates, then you can see the code and then if you want, hack it.

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    7 years ago, # ^ |
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    And when you lock your problem you cant submit on that problem again.So be sure your problem is ablsolutely right before you lock it.

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    7 years ago, # ^ |
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    Thank you very much dude!

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    2 years ago, # ^ |
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    uhm, how can I lock my problem?

    P/S: Can we hack if it is a virtual contest?

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      2 years ago, # ^ |
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      After passing pretest successfully,go to the contest Dashboard.There you will see the option of locking.If you click there,a reminder message will be shown to be confirmed.And please make a sense that after locked a problem ,you can't resubmit that problem during the contest hours.

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    8 months ago, # ^ |
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    Hi, please what do you mean by the rooms? Is it the standings?

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      8 months ago, # ^ |
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      Codeforces randomly group contestants in groups of 30 and assign a room number to the group. You can only hack solutions of contestants in the same room.

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        8 months ago, # ^ |
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        please where then can I find this room?

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        6 months ago, # ^ |
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        The contest is over. Still, I m not able to see people's code in my room. What to do?

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7 years ago, # |
  Vote: I like it +18 Vote: I do not like it

On the dashboard, click the padlock icon for locking a problem (Note, that you can not send your solution for a problem after locking it). Then go to room results, where you can see roommates codes for the problems you've already locked (you can see a certain solution by double clicking on it in the room results table). After you've opened someone's solution, you can consider it and then hack it. When hacking a code, you're entering some testcase on which that code is most likely going to fail (it may be wrong answer, or running out of time/memory limit). When you want to enter a large testcase, you can send test generator instead of typing it. Test generator must be your program which produces a file with a testcase in it. After hacking a code, you can see hacking results. There are two possible outcomes: "Successful hack" — it means the code failed, and you're rewarded with 100 points for that. Otherwise, it's "Unsuccessful hack" (the code did not fail) and you get minus 50 points for that.

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7 years ago, # |
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If you cant solve more problems it is a good way to get points

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    6 years ago, # ^ |
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    Yeah, but you have to be careful cause you can lose points and get bad result...So, don't play with it=)

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2 years ago, # |
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I’m quite sure he’s into many more. You might really wanna consider contacting him today. He’s sure going to be of great help

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6 months ago, # |
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Solution for how to hack: WikiHow