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: "how hard is it to satisfy almost all roommates"
  Abstract: The classic Stable Roommates problem (which is the non-bipartite generalization of the well-known Stable Marriage problem) asks whether there is a stable matching for a given set of agents, i.e. a partitioning of the agents into disjoint pairs such that no two agents induce a blocking pair. Herein, each agent has a preference list denoting who it prefers to have as a partner, and two agents are blocking if they prefer to be with each other rather than with their assigned partners. Since stable matchings may not be unique, we study an NP-hard optimization variant of Stable Roommates, called Egal Stable Roommates, which seeks to find a stable matching with a minimum egalitarian cost {\gamma}, i.e. the sum of the dissatisfaction of the agents is minimum. The dissatisfaction of an agent is the number of agents that this agent prefers over its partner if it is matched; otherwise it is the length of its preference list. We also study almost stable matchings, called Min-Block-Pair Stable Roommates, which seeks to find a matching with a minimum number {\beta} of blocking pairs. Our main result is that Egal Stable Roommates parameterized by {\gamma} is fixed-parameter tractable, while Min-Block-Pair Stable Roommates parameterized by {\beta} is W[1]-hard, even if the length of each preference list is at most five.

Connected through hyperedge HE-1 (induced by source paper "adapting stable matchings to evolving preferences"):
  with members:
    - "stable roommates with narcissistic single peaked and single crossing preferences"
    - "matchings under preferences strength of stability and trade offs"
    - "stable matchings robust solutions and distributive lattices"
    - "stable marriage with multi modal preferences"
    - "reoptimization of parameterized problems"
    - "parameterized dynamic cluster editing"
    - "finding stable matchings that are robust to errors in the input"
    - "finding robust solutions to stable marriage"

Connected through hyperedge HE-2 (induced by source paper "stable roommates with narcissistic single peaked and single crossing preferences"):
  with members:
    - "matchings under preferences strength of stability and trade offs"
    - "stable marriage with multi modal preferences"
    - "stable marriage with groups of similar agents"
    - "balanced stable marriage how close is close enough"
    - "stable marriage with covering constraints a complete computational trichotomy"
    - "modeling single peakedness for votes with ties"
    - "single peaked consistency for weak orders is easy"
    - "clone structures in voters preferences"

Connected through hyperedge HE-3 (induced by source paper "computational complexity of stable marriage and stable roommates and their variants"):
  with members:
    - "stable roommates with narcissistic single peaked and single crossing preferences"
    - "matchings under preferences strength of stability and trade offs"
    - "stable marriage with multi modal preferences"
    - "popular matchings and limits to tractability"
    - "on treewidth and stable marriage"
    - "balanced stable marriage how close is close enough"
    - "the stable roommates problem with short lists"
    - "acyclic preference systems in p2p networks"

Connected through hyperedge HE-4 (induced by source paper "matchings under preferences strength of stability and trade offs"):
  with members:
    - "stable roommates with narcissistic single peaked and single crossing preferences"
    - "stable matchings robust solutions and distributive lattices"
    - "robust and approximately stable marriages under partial information"
    - "stable marriage with multi modal preferences"
    - "finding stable matchings that are robust to errors in the input"
    - "on the complexity of robust stable marriage"
    - "robustness among multiwinner voting rules"
    - "stable matching with uncertain linear preferences"

Connected through hyperedge HE-5 (induced by source paper "parameterized complexity of stable roommates with ties and incomplete lists through the lens of graph parameters"):
  with members:
    - "sat encodings for treecut width and treedepth"
    - "stable marriage with multi modal preferences"
    - "stable marriage with groups of similar agents"
    - "on treewidth and stable marriage"
    - "the stable roommates problem with short lists"
    - "stable marriage with covering constraints a complete computational trichotomy"
    - "acyclic preference systems in p2p networks"

Connected through hyperedge HE-6 (induced by source paper "balanced stable marriage how close is close enough"):
  with members:
    - "stable marriage with groups of similar agents"
    - "on treewidth and stable marriage"
    - "on parameterized complexity of group activity selection problems on social networks"
    - "group activity selection on social networks"
    - "stable marriage with covering constraints a complete computational trichotomy"
    - "raising the bar for vertex cover fixed parameter tractability above a higher guarantee"
    - "parameterized algorithmics for computational social choice nine research challenges"
    - "faster parameterized algorithms using linear programming"

Connected through hyperedge HE-7 (induced by source paper "the stable roommates problem with short lists"):
  with members:
    - "the hospitals residents problem with couples complexity and integer programming models"

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)