2143C - Max Tree It is useful, and actually very easy to implement.
I tried to solve it with DFS, but not very obviously,that's not gonna work.
Spoiler
2143C - Max Tree It is useful, and actually very easy to implement.
I tried to solve it with DFS, but not very obviously,that's not gonna work.
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Here is the USACO guide page for topological sort
Please just look up what you are trying to learn instead of posting blogs like this