Hi all, I was looking at the editorial of the problem but can't really understand why.
USACO 2023 February Contest, Gold: Problem 2. Fertilizing Pastures Problem Link Editorial Link
I understand the part where it says "If Farmer John visits the subtree of child v at time t, it takes dp(v) + sum(v) ⋅t fertilizer."
However, when it moves into talking about minimizing the total fertilizers using greedy methods, the sum part disappears. Is the sum * t part not important when considering the order of the children?
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PurpleCrayon can you fix your editorial?