Contest Problem on Graphs

Revision en2, by amr0, 2018-12-01 13:38:24

Hello, I am not sure how to solve this problem on graphs from a previous contest. Any help is appreciated.

Tags graph, directed graph

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  Rev. Lang. By When Δ Comment
en9 English amr0 2018-12-01 16:20:17 0 (published)
en8 English amr0 2018-12-01 13:45:02 88
en7 English amr0 2018-12-01 13:41:19 60 (saved to drafts)
en6 English amr0 2018-12-01 13:40:47 65
en5 English amr0 2018-12-01 13:39:56 68 Tiny change: 'preciated.' -> 'preciated.\nhttps://codeforces.me/ee120a/og.PNG '
en4 English amr0 2018-12-01 13:38:56 0 Reverted to en2
en3 English amr0 2018-12-01 13:38:40 0 Reverted to en1
en2 English amr0 2018-12-01 13:38:24 0 (published)
en1 English amr0 2018-12-01 13:37:56 131 Initial revision (saved to drafts)