Luo Gu $ P2469 \ [SDOI2010] $ racing interstellar network flow

Positive Solutions: Network Flow

Report problem solving:

Portal $ QwQ $

Aung ,,, long title summarizes say there probably under $ m $ unidirectional edge, $ n $ points, each side has the right to a side, each point has a right to the point, and then ask each point must minimum cost to reach over how much $ QwQ $?

Cuckoo afternoon revel write $ QwQ $