akulsareen's blog

Weird error in C++
By akulsareen, 10 years ago, In English

I had to resubmit an old solution of mine on Codeforces. So I took my old solution, which had a lot of individual #includes in it, replaced them all with one common #include <bits/stdc++.h> and resubmitted.

Surprisingly, my old solution, which gave an AC, gave TLE on case 6 after the change.

Links:

Old solution

New solution

Could someone please point out what happened here?

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10 years ago, # |
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Thats really weird... Here both codes ended up in TLE

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10 years ago, # |
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I've resubmitted your first submission and got TL too (10349435).

It's kinda weird, because it took 0.3s to run on test #6 in 2014, which is more than three times smaller than TL.

Probably it happened because of GCC update, same code gets OK with Visual Studio (10349485) right now.

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    10 years ago, # ^ |
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    I resubmitted my old solution and got TLE too.

    Although, adding ios_base::sync_with_stdio(0) seems to speed it up back to its exact original time.

    The update reason seems to make sense. Thanks a lot.

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