XMORE's blog

By XMORE, history, 4 weeks ago, In English,

Could someone explains to me why the answer to the first testcase is -2 http://codeforces.com/contest/402/problem/D

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4 weeks ago, # |
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That is because the best you can do with the array is transform it to 1,5,17,5,5 in two operations. Now the beauty corresponding to each element is 0,-1,1,-1,-1. And hence the sum is -2.