If a weighted graph is represented by the adjacency list data structure, write a LISP function, neighbors, to return the list of neighbors of a node. For example, if (setq graph '( (a (b 2) (c 5)) (b (c 3) (d 2)) (c) (d (b 8)) ) ) when call: >(neighbors 'b graph) should return: (c d)

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Polynomial Time

The problems for which the deterministic polynomial-time algorithm exists belong to the complexity class (p) and it is central in the field of computational complexity theory. According to Cobham’s thesis, polynomial time is a synonym for “feasible”, “fast”, and “efficient”.