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 the maximum disjoint paths problem on edge colored graphs"
  Abstract: Abstract   We study the problem of finding the maximum number of disjoint uni-color paths in an edge-colored graph. We show the NP-hardness and the approximability and present approximation and exact algorithms. We also study the length-bounded version of the problem, in which the numbers of edges of the found paths are required to be upper bounded by a fixed integer    l   . It is shown that the problem can be solved in polynomial time for    l  ≤  3    and is NP-hard for    l  ≥  4   . We also show that the problem can be approximated with ratio     (  l  −  1  )   /  2  +  e    in polynomial time for any    e  >  0   . Particularly, for    l  =  4   , we present an efficient 2-approximation algorithm.

Connected through hyperedge HE-1 (induced by source paper "on the complexity of color avoiding site and bond percolation"):
  with members:
    - "finding disjoint paths on edge colored graphs more tractability results"

Connected through hyperedge HE-2 (induced by source paper "finding disjoint paths on edge colored graphs more tractability results"):
  with members:
    - "completely inapproximable monotone and antimonotone parameterized problems"
    - "finding disjoint paths on edge colored graphs a multivariate complexity analysis"

Connected through hyperedge HE-3 (induced by source paper "finding disjoint paths on edge colored graphs a multivariate complexity analysis"):
  with members:
    - "completely inapproximable monotone and antimonotone parameterized problems"

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)