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: "faster fast feedback arc set in tournaments"
  Abstract: We present an algorithm that finds a feedback arc set of size $k$ in a tournament in time $n^{O(1)}2^{O(\sqrt{k})}$. This is asymptotically faster than the running time of previously known algorithms for this problem.

Connected through hyperedge HE-1 (induced by source paper "parameterizing edge modification problems above lower bounds"):
  with members:
    - "parameterized lower bounds and dichotomy results for the np completeness of h free edge modification problems"
    - "raising the bar for vertex cover fixed parameter tractability above a higher guarantee"
    - "towards optimal and expressive kernelization for d hitting set"
    - "subexponential parameterized algorithm for computing the cutwidth of a semi complete digraph"
    - "faster parameterized algorithms using linear programming"
    - "subexponential fixed parameter tractability of cluster editing"
    - "on multiway cut parameterized above lower bounds"
    - "on the non existence of polynomial kernels for p l free edge modification problems"

Connected through hyperedge HE-2 (induced by source paper "exploring the complexity of layout parameters in tournaments and semi complete digraphs"):
  with members:
    - "a polynomial turing kernel for weighted independent set in bull free graphs"
    - "cutwidth obstructions and algorithmic aspects"
    - "lower bounds for the parameterized complexity of minimum fill in and other completion problems"
    - "subexponential parameterized algorithm for computing the cutwidth of a semi complete digraph"
    - "a polynomial kernel for proper interval vertex deletion"
    - "computing cutwidth and pathwidth of semi complete digraphs via degree orderings"

Connected through hyperedge HE-3 (induced by source paper "lower bounds for the parameterized complexity of minimum fill in and other completion problems"):
  with members:
    - "time approximation trade offs for inapproximable problems"
    - "on the threshold of intractability"
    - "a polynomial kernel for trivially perfect editing"
    - "a subexponential parameterized algorithm for proper interval completion"
    - "a subexponential parameterized algorithm for interval completion"
    - "sparsification and subexponential approximation"
    - "exploring subexponential parameterized complexity of completion problems"
    - "parameterized in approximability of subset problems"

Connected through hyperedge HE-4 (induced by source paper "beyond bidimensionality parameterized subexponential algorithms on directed graphs"):
  with members:
    - "efficient computation of representative sets with applications in parameterized and exact algorithms"
    - "subexponential parameterized algorithm for computing the cutwidth of a semi complete digraph"
    - "solving connectivity problems parameterized by treewidth in single exponential time"
    - "faster algorithms for feedback arc set tournament kemeny rank aggregation and betweenness tournament"
    - "on finding directed trees with many leaves"
    - "algorithm for finding k vertex out trees and its application to k internal out branching problem"
    - "a linear vertex kernel for maximum internal spanning tree"
    - "kernel s for problems with no kernel on out trees with many leaves"

Connected through hyperedge HE-5 (induced by source paper "faster algorithms for feedback arc set tournament kemeny rank aggregation and betweenness tournament"):
  with members:
    - "fixed parameter algorithms for computing kemeny scores theory and practice"
    - "approximation schemes for the betweenness problem in tournaments and related ranking problems"
    - "kernels for feedback arc set in tournaments"
    - "noisy sorting without resampling"
    - "learning to order things"

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)