calling all geniuses: N^3 is actually N^2 ?????????????

Правка en1, от TwentyOneHundredOrBust, 2019-10-17 02:32:47

https://codeforces.me/contest/1237/submission/62742100

Looks N^3, but seems to be N^2 after constructing many cases. Any proofs/can you hack it?

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en1 Английский TwentyOneHundredOrBust 2019-10-17 02:32:47 203 Initial revision (published)