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: "easy to win hard to master optimal strategies in parity games with costs"
  Abstract: The winning condition of a parity game with costs requires an arbitrary, but fixed bound on the cost incurred between occurrences of odd colors and the next occurrence of a larger even one. Such games quantitatively extend parity games while retaining most of their attractive properties, i.e, determining the winner is in NP and co-NP and one player has positional winning strategies. #R##N#We show that the characteristics of parity games with costs are vastly different when asking for strategies realizing the minimal such bound: The solution problem becomes PSPACE-complete and exponential memory is both necessary in general and always sufficient. Thus, solving and playing parity games with costs optimally is harder than just winning them. Moreover, we show that the tradeoff between the memory size and the realized bound is gradual in general. All these results hold true for both a unary and binary encoding of costs. #R##N#Moreover, we investigate Streett games with costs. Here, playing optimally is as hard as winning, both in terms of complexity and memory.

Connected through hyperedge HE-1 (induced by source paper "quantitative reductions and vertex ranked infinite games"):
  with members:
    - "window parity games an alternative approach toward parity games with time bounds"
    - "average energy games"
    - "parametric linear dynamic logic"
    - "meet your expectations with guarantees beyond worst case synthesis in quantitative games"
    - "the complexity of multi mean payoff and multi energy games"
    - "measuring permissiveness in parity games mean payoff parity games revisited"
    - "generalized mean payoff and energy games"
    - "energy parity games"

Connected through hyperedge HE-2 (induced by source paper "parity games with weights"):
  with members:
    - "an ordered approach to solving parity games in quasi polynomial time and quasi linear space"
    - "succinct progress measures for solving parity games"
    - "symmetric strategy improvement"
    - "infinite state games with finitary conditions"

Connected through hyperedge HE-3 (induced by source paper "finite state strategies in delay games full version"):
  with members:
    - "games with costs and delays"
    - "an ordered approach to solving parity games in quasi polynomial time and quasi linear space"
    - "succinct progress measures for solving parity games"
    - "finite state strategies in delay games"
    - "extending finite memory determinacy to multiplayer games"
    - "what are strategies in delay games borel determinacy for games with lookahead"
    - "delay games with wmso u winning conditions"
    - "weak mso with the unbounding quantifier"

Connected through hyperedge HE-4 (induced by source paper "games with costs and delays"):
  with members:
    - "how much lookahead is needed to win infinite games"
    - "what are strategies in delay games borel determinacy for games with lookahead"
    - "delay games with wmso u winning conditions"
    - "parity and streett games with costs"
    - "degrees of lookahead in regular infinite games"
    - "optimal bounds in parametric ltl games"
    - "weak mso with the unbounding quantifier"

Connected through hyperedge HE-5 (induced by source paper "quantitative reductions and vertex ranked infinite games full version"):
  with members:
    - "window parity games an alternative approach toward parity games with time bounds"
    - "average energy games"
    - "parametric linear dynamic logic"
    - "parity and streett games with costs"
    - "down the borel hierarchy solving muller games via safety games"
    - "playing muller games in a hurry"
    - "energy parity games"

Connected through hyperedge HE-6 (induced by source paper "window parity games an alternative approach toward parity games with time bounds"):
  with members:
    - "looking at mean payoff and total payoff through windows"
    - "infinite state games with finitary conditions"
    - "automated synthesis of reliable and efficient systems through game theory a case study"
    - "parity and streett games with costs"
    - "strategy synthesis for multi dimensional quantitative objectives"
    - "the surprizing complexity of generalized reachability games"

Connected through hyperedge HE-7 (induced by source paper "window parity games an alternative approach toward parity games with time bounds full version"):
  with members:
    - "window parity games an alternative approach toward parity games with time bounds"
    - "parity and streett games with costs"
    - "strategy synthesis for multi dimensional quantitative objectives"
    - "the surprizing complexity of generalized reachability games"

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.LO(Logic in Computer Science)