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Q&A How do I find disjoint sets in a dataset

Your example is a bipartite graph in adjacency list format. The cars are nodes on the left, the people are nodes on the right. When a person "has" a car, there is an edge between the car and person...

posted 1y ago by matthewsnyder‭

Answer
#1: Initial revision by user avatar matthewsnyder‭ · 2023-06-30T00:02:07Z (over 1 year ago)
Your example is a bipartite graph in adjacency list format. The cars are nodes on the left, the people are nodes on the right. When a person "has" a car, there is an edge between the car and person. Your question is equivalent to asking for the connected components of the graph.

This can be done with standard algorithms like Depth First Search in O(n+m) time (nodes+edges). You can find implementations in libraries like NetworkX.