Editorial for Another Contest 7 Problem 4 - Team Assignments
Remember to use this editorial only when stuck, and not to copy-paste code from it. Please be respectful to the problem author and editorialist.
Submitting an official solution before solving the problem yourself is a bannable offence.
Submitting an official solution before solving the problem yourself is a bannable offence.
The graph structure does not matter - there are ways to -color a tree with vertices.
To count the number of such colorings that use all colors, use inclusion-exclusion.
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