can someone explain this editorial

Правка en1, от mac_n_cheese_pog, 2021-09-27 04:43:26

https://atcoder.jp/contests/abc220/editorial/2703

on the recent atcoder round,i find problem D not very intuitive.can someone explain the editorial even more?

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en1 Английский mac_n_cheese_pog 2021-09-27 04:43:26 195 Initial revision (published)