human: Given a hyperedge-centered hypergraph: <hypergraph>, where the center hyperedge is induced by one source paper and its member nodes are the cited papers.

Details of the hypergraph:
Center hyperedge (induced by source paper "sorting networks to the end and back again"):
  Abstract: Abstract   New properties of the front and back ends of sorting networks are studied, illustrating their utility when searching for bounds on optimal networks. Search focuses first on the “out-sides” of the network and then on the inner part. Previous works focused on properties of the front end to break symmetries in the search. The new, out-side-in, properties shed understanding on how sorting networks sort, and facilitate the computation of new bounds on optimality. We present new, faster, parallel sorting networks for 17–20 inputs. For 17 inputs, we show that no sorting network using less layers exists.

Includes members:
  Member "optimal depth sorting networks":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "sorting networks the final countdown")
  Member "new bounds on optimal sorting networks":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "joint size and depth optimization of sorting networks")
  Member "applying sorting networks to synthesize optimized sorting libraries":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "optimal depth sorting networks")
  Member "sorting networks the end game":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "optimal depth sorting networks")
  Member "the quest for optimal sorting networks efficient generation of two layer prefixes":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "enhanced optimization with composite objectives and novelty selection")
  Member "optimal sorting networks":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "optimal metastability containing sorting via parallel prefix computation")

Question: Please tell me which class the source paper 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)