I had a problem in my class quiz to write a non determinstic algorithm for Vertex Cover. We discussed about the solution with our instructor and he told that the level indeterminancy should not be too high. It should be sensibly good.
I am confused about what question should I ask to non-deterministic computer ?
Non-Deterministic Algorithm for Vertex Cover
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The obvious question is "which vertex next"?
A simple greedy approximation algorithm for vertex cover repeatedly chooses the vertex with the most uncovered adjacent vertices.
A simple non-deterministic approximation algorithm for vertex cover repeatedly chooses the next vertex randomly, but with the probability assigned to each vertex proportional to its number of uncovered adjacent vertices. Do that over and over again, remembering the best solution so far.