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: "parameterized complexity of the k arc chinese postman problem"
  Abstract: In the Mixed Chinese Postman Problem (MCPP), given an edge-weighted mixed graph $G$ ($G$ may have both edges and arcs), our aim is to find a minimum weight closed walk traversing each edge and arc at least once. The MCPP parameterized by the number of edges was known to be fixed-parameter tractable using a simple argument. Solving an open question of van Bevern et al., we prove that the MCPP parameterized by the number of arcs is also fixed-parameter tractable. Our proof is more involved and, in particular, uses a well-known result of Marx, O'Sullivan and Razgon (2013) on the treewidth of torso graphs with respect to small separators. We obtain a small cut analog of this result, and use it to construct a tree decomposition which, despite not having bounded width, has other properties allowing us to design a fixed-parameter algorithm.

Connected through hyperedge HE-1 (induced by source paper "parameterized algorithms and data reduction for the short secluded s t path problem"):
  with members:
    - "on the computational complexity of length and neighborhood constrained path problems"
    - "the parameterized complexity of finding secluded solutions to some classical optimization problems on graphs"
    - "a parameterized approximation algorithm for the mixed and windy capacitated arc routing problem theory and experiments"
    - "finding connected secluded subgraphs"
    - "polynomial kernels for weighted problems"
    - "parameterized complexity of secluded connectivity problems"
    - "route planning in transportation networks"
    - "parameterized complexity of k chinese postman problem"

Connected through hyperedge HE-2 (induced by source paper "the euler and chinese postman problems on 2 arc colored digraphs"):
  with members:
    - "chinese postman problem on edge colored multigraphs"
    - "parameterized directed k chinese postman problem and k arc disjoint cycles problem on euler digraphs"
    - "structural parameterizations of the mixed chinese postman problem"
    - "parameterized complexity of k chinese postman problem"
    - "on channel discontinuity constraint routing in wireless networks"

Connected through hyperedge HE-3 (induced by source paper "the parameterized complexity of the minimum shared edges problem"):
  with members:
    - "the minimum shared edges problem on grid like graphs"
    - "the minimum shared edges problem on planar graphs"
    - "on the parameterized complexity of computing balanced partitions in graphs"
    - "structural parameterizations of the mixed chinese postman problem"
    - "list h coloring a graph by removing few vertices"
    - "kernelization lower bounds by cross composition"
    - "finding small separators in linear time via treewidth reduction"
    - "solving connectivity problems parameterized by treewidth in single exponential time"

Connected through hyperedge HE-4 (induced by source paper "a fixed parameter algorithm for a routing open shop problem unit processing times few machines and locations"):
  with members:
    - "a parameterized complexity view on non preemptively scheduling interval constrained jobs few machines small looseness and small slack"
    - "completing partial schedules for open shop with unit processing times and routing"
    - "interval scheduling and colorful independent sets"
    - "approximation algorithms for mixed windy and capacitated arc routing problems"
    - "structural parameterizations of the mixed chinese postman problem"
    - "parameterized complexity of k chinese postman problem"
    - "parameterized rural postman problem"

Connected through hyperedge HE-5 (induced by source paper "completing partial schedules for open shop with unit processing times and routing"):
  with members:
    - "a parameterized complexity view on non preemptively scheduling interval constrained jobs few machines small looseness and small slack"
    - "interval scheduling and colorful independent sets"
    - "approximation algorithms for mixed windy and capacitated arc routing problems"
    - "structural parameterizations of the mixed chinese postman problem"
    - "parameterized complexity of k chinese postman problem"

Connected through hyperedge HE-6 (induced by source paper "chinese postman problem on edge colored multigraphs"):
  with members:
    - "structural parameterizations of the mixed chinese postman problem"
    - "on channel discontinuity constraint routing in wireless networks"
    - "note on counting eulerian circuits"

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)