权威例句
Some simplified NP -complete graph problemsA Guide to the Theory of NP-CompletenessApproximation Algorithms for NP-hard ProblemsApproximation Algorithms for NP-Hard ProblemsComputers and Intractability: A Guide to NP-CompletenessProbabilistic checking of proofs:a new characterization of NPComputers and Intractability: A Guide to the Theory of NP-CompletenessComputers and Intractability: A Guide to the Theory of NP-CompletenessComputers and Intractability: A Guide to the Theory of NP-CompletenessComputers and In stractability: A Guide to the Theory of NP-Completeness. W. H Freeman, San Fran