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Fun fact: E can be solved in O(nlogn) because the point the edu is talking about always turns out to be the mean of the elements (because the sum of elements to its right is as close as possible to the sum of elements to its left) we check costl and costr of the element that is less than ceil(mean) (since the mean is not necessarily an integer) and check costl and costr for ceil(mean) https://mirror.codeforces.com/contest/2203/submission/364764786
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I would like to participate!!
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Oof even an expert
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Thanks for the help! And the explanation
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Thanks for the help! After adding that I got it AC