461 c FILE: DSJC500.5 c c SOURCE: David Johnson (dsj@research.att.com) c c DESCRIPTION: Random graph used in the paper c "Optimization by Simulated Annealing: An c Experimental Evaluation; Part II, Graph c Coloring and Number Partitioning" by c David S. Johnson, Cecilia R. Aragon, c Lyle A. 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