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: "longest gapped repeats and palindromes"
  Abstract: A gapped repeat (respectively, palindrome) occurring in a word w is a factor uvu (respectively, u R vu) of w. In such a repeat (palin- drome) u is called the arm of the repeat (respectively, palindrome), while v is called the gap. We show how to compute eciently, for every position i of the word w, the longest gapped repeat and palindrome occurring at that position, provided that the length of the gap is subject to various types of restrictions. That is, that for each position i we compute the longest prex u of w(i::n) such that uv (respectively, u R v) is a sux of

Connected through hyperedge HE-1 (induced by source paper "on the number of gapped repeats with arbitrary gap"):
  with members:
    - "the runs theorem"
    - "efficiently finding all maximal alpha gapped repeats"
    - "searching of gapped repeats and subrepetitions in a word"
    - "on primary and secondary repetitions in words"
    - "on the maximal sum of exponents of runs in a string"

Connected through hyperedge HE-2 (induced by source paper "efficient computation of longest single arm gapped palindromes in a string"):
  with members:
    - "computing longest single arm gapped palindromes in a string"

Connected through hyperedge HE-3 (induced by source paper "optimal searching of gapped repeats in a word"):
  with members:
    - "the runs theorem"
    - "beyond the runs theorem"
    - "lempel ziv factorization may be harder than computing all runs"
    - "searching of gapped repeats and subrepetitions in a word"
    - "on primary and secondary repetitions in words"
    - "on the maximal sum of exponents of runs in a string"
    - "on maximal repetitions of arbitrary exponent"

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)