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 "matching patterns with variables"):
  Abstract: A pattern p (i.e., a string of variables and terminals) matches a word w, if w can be obtained by uniformly replacing the variables of p by terminal words. The respective matching problem, i.e., deciding whether or not a given pattern matches a given word, is generally NP-complete, but can be solved in polynomial-time for classes of patterns with restricted structure. In this paper we overview a series of recent results related to efficient matching for patterns with variables, as well as a series of extensions of this problem.

Includes members:
  Member "graph and string parameters connections between pathwidth cutwidth and the locality number":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "target set selection for conservative populations")
  Member "quadratic word equations with length constraints counter systems and presburger arithmetic with divisibility":
    also connected through other hyperedges:
      (none)
  Member "the hardness of solving simple word equations":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "the theory of concatenation over finite models")
  Member "the runs theorem":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "lyndon words versus inverse lyndon words queries on suffixes and bordered words")
  Member "decidability complexity and expressiveness of first order logic over the subword ordering":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "scattered factor universality of words")
  Member "detecting one variable patterns":
    also connected through other hyperedges:
      (none)
  Member "solutions of word equations over partially commutative structures":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "word equations in linear space")
  Member "a parameterized study of maximum generalized pattern matching problems":
    also connected through other hyperedges:
      (none)

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)