Need help for an AtCoder problem!

Revision en1, by nthoang, 2019-02-20 11:31:49

Hi Codeforces,

Recently I am solving this problem from AtCoder Regular Contest 061: https://atcoder.jp/contests/arc061/tasks/arc061_d

However, I do not come up with any idea. I have tried to look at others' submissions since this contest does not have an English editorial, but I still cannot figure out what the mathematical formulas written in those codes mean.

Hope you guys can help me with the solution for this problem. Many thanks!

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en1 English nthoang 2019-02-20 11:31:49 480 Initial revision (published)