how to use mincost-flow for solving problems on greedy?

Правка en2, от 300iq, 2016-09-14 11:27:10

Сan you please tell the basic principle of solving such problems with mincost. And please write problems that are solved by this method. for example BubbleCup, task G was one of these.

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  Rev. Язык Кто Когда Δ Комментарий
ru3 Русский 300iq 2016-09-14 11:30:39 1
ru2 Русский 300iq 2016-09-14 11:28:18 411
en2 Английский 300iq 2016-09-14 11:27:10 0 (published)
en1 Английский 300iq 2016-09-14 11:27:03 244 Initial revision for English translation (saved to drafts)
ru1 Русский 300iq 2016-09-14 11:26:49 244 Первая редакция (опубликовано)