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Can someone explain 1917B solution?
This was my solution with O(n^2) complexity which results in MLE:
https://codeforces.me/contest/1917/submission/238752759
Here is the solution with a lower complexity:
https://codeforces.me/contest/1917/submission/239038045
I did not understand what was done in the solution. Can anyone explain?
I read the editorial but can't understand that aswell.
