human: Given a node-centered hypergraph: <hypergraph>, where nodes represent papers and hyperedges represent sets of papers co-cited by a source paper.

Details of the hypergraph:
Center node: "metric 1 median selection query complexity vs approximation ratio"
  Abstract: Consider the problem of finding a point in a metric space $(\{1,2,\ldots,n\},d)$ with the minimum average distance to other points. We show that this problem has no deterministic $o(n^{1+1/(h-1)})$-query $(2h-\Omega(1))$-approximation algorithms for any constant $h\in\mathbb{Z}^+\setminus\{1\}$.

Connected through hyperedge HE-1 (induced by source paper "metric random matchings with applications"):
  with members:
    - "a deterministic sublinear time nonadaptive algorithm for metric 1 median selection"
    - "a lower bound for metric 1 median selection"
    - "optimal time bounds for approximate clustering"
    - "fast approximation of centrality"

Connected through hyperedge HE-2 (induced by source paper "a las vegas approximation algorithm for metric 1 median selection"):
  with members:
    - "a deterministic sublinear time nonadaptive algorithm for metric 1 median selection"
    - "a lower bound for metric 1 median selection"
    - "optimal time bounds for approximate clustering"
    - "fast approximation of centrality"

Connected through hyperedge HE-3 (induced by source paper "metric 1 median selection with fewer queries"):
  with members:
    - "a deterministic sublinear time nonadaptive algorithm for metric 1 median selection"
    - "a lower bound for metric 1 median selection"

Connected through hyperedge HE-4 (induced by source paper "a lower bound for metric 1 median selection"):
  with members:
    - "a deterministic sublinear time nonadaptive algorithm for metric 1 median selection"
    - "approximating k median via pseudo approximation"
    - "a simple d 2 sampling based ptas for k means and other clustering problems"
    - "optimal time bounds for approximate clustering"
    - "fast approximation of centrality"

Question: Please tell me which class the center node belongs to. The 40 classes are: cs.NA(Numerical Analysis), cs.MM(Multimedia), cs.LO(Logic in Computer Science), cs.CY(Computers and Society), cs.CR(Cryptography and Security), cs.DC(Distributed, Parallel, and Cluster Computing), cs.HC(Human-Computer Interaction), cs.CE(Computational Engineering, Finance, and Science), cs.NI(Networking and Internet Architecture), cs.CC(Computational Complexity), cs.AI(Artificial Intelligence), cs.MA(Multiagent Systems), cs.GL(General Literature), cs.NE(Neural and Evolutionary Computing), cs.SC(Symbolic Computation), cs.AR(Hardware Architecture), cs.CV(Computer Vision and Pattern Recognition), cs.GR(Graphics), cs.ET(Emerging Technologies), cs.SY(Systems and Control), cs.CG(Computational Geometry), cs.OH(Other Computer Science), cs.PL(Programming Languages), cs.SE(Software Engineering), cs.LG(Machine Learning), cs.SD(Sound), cs.SI(Social and Information Networks), cs.RO(Robotics), cs.IT(Information Theory), cs.PF(Performance), cs.CL(Computation and Language), cs.IR(Information Retrieval), cs.MS(Mathematical Software), cs.FL(Formal Languages and Automata Theory), cs.DS(Data Structures and Algorithms), cs.OS(Operating Systems), cs.GT(Computer Science and Game Theory), cs.DB(Databases), cs.DL(Digital Libraries), cs.DM(Discrete Mathematics). Directly output the class name.

gpt: cs.CC(Computational Complexity)