Attacking_Maniac's blog

Is such a situation possible
By Attacking_Maniac, history, 5 years ago, In English

Can anyone tell me a test case for this problem:- 282B - Раскрашивание яиц that gives "-1" as the output

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5 years ago, # |
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There is none.

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5 years ago, # |
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3 100 900 100 900 100 900

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    5 years ago, # ^ |
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    In this example, you can give A all three eggs and $$$|300-0| \le 500$$$, as desired.

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      5 years ago, # ^ |
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      Oh my bad. Sure thanks

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        5 years ago, # ^ |
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        At last, the question still remains the same, if there is no such test case possible then why the hell did codeforces include such a possibility in the question anyway, not even one test case gives the output as "-1"

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          5 years ago, # ^ |
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          They probably didn't want to give any hint away about the solution.

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            5 years ago, # ^ |
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            yeah that's a possible case but we still don't have any mathematical proof to whether this situation is possible or not ..... so i am still waiting for someone to give me one

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              5 years ago, # ^ |
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              Most competitions have a tutorial, which includes both a solution and a proof of correctness. It should answer your question.

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                5 years ago, # ^ |
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                There is no mention about such a situation ...... though they have given a proof for other test cases....I think we can come to a conclusion using this..... but I don't know how

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                  5 years ago, # ^ |
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                  Have you read the proof? It shows why you can always find a solution. Hence you never need to output -1.

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