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: "on fence patrolling by mobile agents"
  Abstract: Suppose that a fence needs to be protected (perpetually) by $k$ mobile agents with maximum speeds $v_1,\ldots,v_k$ so that no point on the fence is left unattended for more than a given amount of time. The problem is to determine if this requirement can be met, and if so, to design a suitable patrolling schedule for the agents. Alternatively, one would like to find a schedule that minimizes the \emph{idle time}, that is, the longest time interval during which some point is not visited by any agent. We revisit this problem, introduced by Czyzowicz et al.(2011), and discuss several strategies for the cases where the fence is an open and a closed curve, respectively. #R##N#In particular: (i) we disprove a conjecture by Czyzowicz et al. regarding the optimality of their Algorithm ${\mathcal A_2}$ for unidirectional patrolling of a closed fence; (ii) we present an algorithm with a lower idle time for patrolling an open fence, improving an earlier result of Kawamura and Kobayashi.

Connected through hyperedge HE-1 (induced by source paper "computing the k resilience of a synchronized multi robot system"):
  with members:
    - "fence patrolling by mobile agents with distinct speeds"
    - "simple strategies versus optimal schedules in multi agent patrolling"

Connected through hyperedge HE-2 (induced by source paper "simple strategies versus optimal schedules in multi agent patrolling"):
  with members:
    - "fence patrolling by mobile agents with distinct speeds"

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.DS(Data Structures and Algorithms)