CP_nii_krni's blog

strange output in a problem.. Plz help with it
By CP_nii_krni, history, 4 years ago, In English

my code for that problem is working on custom test of cf and even in my system compiler.. and i'm getting required answer to all test cases but on submission at cf I got strange massage saying wrong answer... And that comment is

Can't find file K:\ramdisk\codeforces61\9c5383c0192771e8d22775984f40362f\check-e068a9b89c80e5d690845be2e470a589\run\output.txt invokerId=ef4de2e8346ee1a664bb563100318fea, location=203279215

plz help me to get rid of this..

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4 years ago, # |
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The problem probably requires reading/writing from a specified file. Can you link the problem and your submission?

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    4 years ago, # ^ |
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    Problem link :: https://mirror.codeforces.com/contest/254/problem/B

    solution link :: https://mirror.codeforces.com/contest/254/submission/96413858

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      4 years ago, # ^ |
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      Spoiler

      You can replace these lines in int main()

          #ifndef ONLINE_JUDGE
    freopen("in.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
    #endif

      with,

          freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
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        4 years ago, # ^ |
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        thanks a lot bhaiya.. it solved my issue.. but i wanted to know the difference plz provide me some useful links to get deeper if possible..

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    4 years ago, # ^ |
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    In addition to this, make sure you know what the macros you're using actually do. Then reread the problem statement. Mainly the top part, which is conveniently bolded so that you'll look at it.

    Once you've figured that out, look at the diagnostics that CF is giving you. You're basically getting free debugging help from the system. Given these resources you should be able to figure this out on your own.

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4 years ago, # |
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You can use this piece of code for accessing input and output files.

ifstream in;
ofstream out;
in.open("input.txt");
out.open("output.txt");

Because, as far as I think, #ifndef ONLINE_JUDGE is ignored by codeforces compiler. Even if we write this in codes with input and output from stdin and stdout, it works (ignoring the command to accept input from files).

And also, your submission diagnostics say that, code is executed with error 'out of bounds'. So you must also check that issue.

Hope this helps.

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