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: "reachability time games on timed automata"
  Abstract: In a reachability-time game, players Min and Max choose moves so that the time to reach a final state in a timed automaton is minimised or maximised, respectively. Asarin and Maler showed decidability of reachability-time games on strongly non-Zeno timed automata using a value iteration algorithm. This paper complements their work by providing a strategy improvement algorithm for the problem. It also generalizes their decidability result because the proposed strategy improvement algorithm solves reachability-time games on all timed automata. The exact computational complexity of solving reachability-time games is also established: the problem is EXPTIME-complete for timed automata with at least two clocks.

Connected through hyperedge HE-1 (induced by source paper "one clock priced timed games are pspace hard"):
  with members:
    - "simple priced timed games are not that simple"
    - "adding negative prices to priced timed games"
    - "a faster algorithm for solving one clock priced timed games"
    - "two player reachability price games on single clock timed automata"

Connected through hyperedge HE-2 (induced by source paper "timed basic parallel processes"):
  with members:
    - "effective definability of the reachability relation in timed automata"
    - "decidability of timed communicating automata"
    - "universal safety for timed petri nets is pspace complete"
    - "reachability in two clock timed automata is pspace complete"
    - "a faster algorithm for solving one clock priced timed games"
    - "reachability analysis of communicating pushdown systems"
    - "reachability of communicating timed processes"
    - "alternating timed automata"

Connected through hyperedge HE-3 (induced by source paper "optimal reachability in divergent weighted timed games"):
  with members:
    - "simple priced timed games are not that simple"
    - "adding negative prices to priced timed games"
    - "to reach or not to reach efficient algorithms for total payoff games"
    - "a faster algorithm for solving one clock priced timed games"
    - "two player reachability price games on single clock timed automata"

Connected through hyperedge HE-4 (induced by source paper "expected reachability time games"):
  with members:
    - "adding negative prices to priced timed games"
    - "optimizing performance of continuous time stochastic systems using timeout synthesis"
    - "quantitative games on probabilistic timed automata"
    - "adaptive scheduling of data paths using uppaal tiga"
    - "model checking probabilistic timed automata with one or two clocks"

Connected through hyperedge HE-5 (induced by source paper "a faster algorithm for solving one clock priced timed games"):
  with members:
    - "two player reachability price games on single clock timed automata"

Connected through hyperedge HE-6 (induced by source paper "quantitative games on probabilistic timed automata"):
  with members:
    - "model checking probabilistic timed automata with one or two clocks"

Connected through hyperedge HE-7 (induced by source paper "average time games on timed automata"):
  with members:
    - "model checking probabilistic timed automata with one or two clocks"

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)