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: "combining binary search trees"
  Abstract: We present a general transformation for combining a constant number of binary search tree data structures (BSTs) into a single BST whose running time is within a constant factor of the minimum of any "well-behaved" bound on the running time of the given BSTs, for any online access sequence. #R##N#(A BST has a well behaved bound with $f(n)$ overhead if it spends at most \bigoh{f(n)} time per access and its bound satisfies a weak sense of closure under subsequences.) In particular, we obtain a BST data structure that is \bigoh{\log\log n} competitive, satisfies the working set bound (and thus satisfies the static finger bound and the static optimality bound), satisfies the dynamic finger bound, satisfies the unified bound with an additive \bigoh{\log\log n} factor, and performs each access in worst-case \bigoh{\log n} time.

Connected through hyperedge HE-1 (induced by source paper "new paths from splay to dynamic optimality"):
  with members:
    - "splaying preorders and postorders"
    - "weighted dynamic finger in binary search trees"
    - "the landscape of bounds for binary search trees"
    - "a linear potential function for pairing heaps"
    - "a study on splay trees"
    - "pattern avoiding access in binary search trees"
    - "self adjusting binary search trees what makes them tick"
    - "in pursuit of the dynamic optimality conjecture"

Connected through hyperedge HE-2 (induced by source paper "belga b trees"):
  with members:
    - "weighted dynamic finger in binary search trees"
    - "multi finger binary search trees"
    - "the landscape of bounds for binary search trees"
    - "the power and limitations of static binary search trees with lazy finger"
    - "in pursuit of the dynamic optimality conjecture"
    - "the fresh finger property"
    - "worst case optimal tree layout in external memory"

Connected through hyperedge HE-3 (induced by source paper "weighted dynamic finger in binary search trees"):
  with members:
    - "a global geometric view of splaying"
    - "the power and limitations of static binary search trees with lazy finger"
    - "in pursuit of the dynamic optimality conjecture"
    - "upper bounds for maximally greedy binary search trees"
    - "de amortizing binary search trees"

Connected through hyperedge HE-4 (induced by source paper "pattern avoiding access in binary search trees"):
  with members:
    - "greedy is an almost optimal deque"
    - "self adjusting binary search trees what makes them tick"
    - "the computational landscape of permutation patterns"
    - "in pursuit of the dynamic optimality conjecture"
    - "upper bounds for maximally greedy binary search trees"
    - "improved bounds and new techniques for davenport schinzel sequences and their generalizations"
    - "splay trees davenport schinzel sequences and the deque conjecture"

Connected through hyperedge HE-5 (induced by source paper "a study on splay trees"):
  with members:
    - "new paths from splay to dynamic optimality"
    - "self adjusting binary search trees what makes them tick"
    - "in pursuit of the dynamic optimality conjecture"
    - "the fresh finger property"
    - "upper bounds for maximally greedy binary search trees"
    - "splay trees davenport schinzel sequences and the deque conjecture"

Connected through hyperedge HE-6 (induced by source paper "in pursuit of the dynamic optimality conjecture"):
  with members:
    - "the power and limitations of static binary search trees with lazy finger"
    - "upper bounds for maximally greedy binary search trees"
    - "de amortizing binary search trees"

Connected through hyperedge HE-7 (induced by source paper "the power and limitations of static binary search trees with lazy finger"):
  with members:
    - "a static optimality transformation with applications to planar point location"
    - "worst case optimal tree layout in external memory"

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)