Editorial for ICPC NEERC 2010 K - Graph Oddity


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.
  • On an odd k-graph, at least one node has degree strictly less than k
  • Run DFS starting from this node
  • When backing out from DFS, color each node
    • Each node in DFS tree will have strictly less than k children, so a unique color can be always found

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