Hello codeforces
Codeforces Round 891 (Div. 3) where hacks? why now is System testing? Can explain what it is?
Thank you
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Hello codeforces
Codeforces Round 891 (Div. 3) where hacks? why now is System testing? Can explain what it is?
Thank you
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They removed the test cases for problem F which had a query with x=0 in them (which was illegal input according to the problem set) and rejudged all submissions (and also invalidate hacks with x=0 (invalidating x=0 as a valid input)). The hacking phase continues.
Where did you get this information from?
I checked the solution of the author of the blog https://mirror.codeforces.com/blog/entry/119122. Most (probably all) of his solutions for problem F WA on Test 7 (prior to the incident). (Saw the test case too it had 4 queries with x=0). I rechecked them post fixation and they seem AC.
Hence, I made a conclusion about the situation.
One may argue it's time wasting but... Doesn't matter :)
Thank you
The announcement is gone now and so are the hacks. Is it unrated?
The announcement is back now. They mentioned that they fixed the tests and reverted illegal hacks. There is No mention of it being unrated.
I checked some cases using the status tab which fail at test 7 (the first illegal test case with x=0 in it's query) Out of some 40 random tests, I only found approximately 6 of them failing only at the x=0 query. Rest of them also failed at different not-illegal queries of test 7. Hence the notion of "the error affecting only some people."