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: "approximation algorithms for covering packing integer programs"
  Abstract: Given matrices A and B and vectors a, b, c and d, all with non-negative entries, we consider the problem of computing min{c^Tx:[email protected]?Z"+^n,Ax>=a,Bx==a) and multiplicity constraints (x=

Connected through hyperedge HE-1 (induced by source paper "computing a small agreeable set of indivisible items"):
  with members:
    - "fair division under cardinality constraints"
    - "approximation algorithms for computing maximin share allocations"
    - "approximate maximin shares for groups of agents"
    - "democratic fair allocation of indivisible goods"
    - "assigning a small agreeable set of indivisible items to multiple players"
    - "envy free cake cutting among families"
    - "proportional cake cutting among families"
    - "finding a collective set of items from proportional multirepresentation to group recommendation"

Connected through hyperedge HE-2 (induced by source paper "on approximating partial set cover and generalizations"):
  with members:
    - "on approximating sparse covering integer programs"
    - "on the partition set cover problem"
    - "on partial covering for geometric set systems"
    - "partial resampling to approximate covering integer programs"
    - "a note on concentration of submodular functions"

Connected through hyperedge HE-3 (induced by source paper "a near linear time minimum steiner cut algorithm for planar graphs"):
  with members:
    - "all pairs minimum cuts in near linear time for surface embedded graphs"

Connected through hyperedge HE-4 (induced by source paper "fast and deterministic approximations for k cut"):
  with members:
    - "lp relaxation and tree packing for minimum k cuts"
    - "on approximating sparse covering integer programs"
    - "faster exact and approximate algorithms for k cut"
    - "fast approximations for metric tsp via linear programming"
    - "an fpt algorithm beating 2 approximation for k cut"
    - "approximating the held karp bound for metric tsp in nearly linear time"
    - "deterministic global minimum cut of a simple graph in near linear time"
    - "nearly linear time approximation schemes for mixed packing covering and facility location linear programs"

Connected through hyperedge HE-5 (induced by source paper "on approximating sparse covering integer programs"):
  with members:
    - "approximating the held karp bound for metric tsp in nearly linear time"
    - "partial resampling to approximate covering integer programs"
    - "a nearly linear time ptas for explicit fractional packing and covering linear programs"
    - "approximating sparse covering integer programs online"
    - "submodular function maximization via the multilinear relaxation and contention resolution schemes"

Connected through hyperedge HE-6 (induced by source paper "mixed integer programming with convex concave constraints fixed parameter tractability and applications to multicovering and voting"):
  with members:
    - "a parameterized strongly polynomial algorithm for block structured integer programs"
    - "faster algorithms for integer programs with block structure"
    - "fair knapsack"
    - "scheduling meets n fold integer programming"
    - "evaluating and tuning n fold integer programming"
    - "combinatorial n fold integer programming and applications"
    - "integer programming in parameterized complexity three miniatures"
    - "solving integer linear programs with a small number of global variables and constraints"

Connected through hyperedge HE-7 (induced by source paper "stochastic packing integer programs with few queries"):
  with members:
    - "the stochastic matching problem beating half with a non adaptive algorithm"
    - "almost optimal stochastic weighted matching with few queries"
    - "adaptivity gaps for stochastic probing submodular and xos functions"
    - "ignorance is almost bliss near optimal stochastic matching with few queries"
    - "generalized hypergraph matching via iterated packing and local ratio"
    - "submodular stochastic probing on matroids"
    - "a stochastic probing problem with applications"
    - "iterative packing for demand and hypergraph matching"

Connected through hyperedge HE-8 (induced by source paper "partial resampling to approximate covering integer programs"):
  with members:
    - "lopsidependency in the moser tardos framework beyond the lopsided lovasz local lemma"
    - "nearly linear work algorithms for mixed packing covering and facility location linear programs"
    - "tighter inapproximability for set cover"
    - "a constructive proof of the general lovasz local lemma"

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)