logic behind this problem anya and the ghosts

Revision en2, by dikki99, 2020-04-24 17:57:37

link to the problem:-https://codeforces.net/contest/508/problem/C

please explain the logic behind this problem. I have looked into the editorial but it's not clear.

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en2 English dikki99 2020-04-24 17:57:37 54 Tiny change: 's problem.' -> 's problem. I have looked into the editorial but it's not clear.'
en1 English dikki99 2020-04-24 17:09:15 160 Initial revision (published)