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: "a o 1 eps 2 n time sieving algorithm for approximate integer programming"
  Abstract: The Integer Programming Problem (IP) for a polytope P \subseteq R^n is to find an integer point in P or decide that P is integer free. We give an algorithm for an approximate version of this problem, which correctly decides whether P contains an integer point or whether a (1+\eps) scaling of P around its barycenter is integer free in time O(1/\eps^2)^n. We reduce this approximate IP question to an approximate Closest Vector Problem (CVP) in a "near-symmetric" semi-norm, which we solve via a sieving technique first developed by Ajtai, Kumar, and Sivakumar (STOC 2001). Our main technical contribution is an extension of the AKS sieving technique which works for any near-symmetric semi-norm. Our results also extend to general convex bodies and lattices.

Connected through hyperedge HE-1 (induced by source paper "covering convex bodies and the closest vector problem"):
  with members:
    - "on compact representations of voronoi cells of lattices"
    - "just take the average an embarrassingly simple 2 n time algorithm for svp and cvp"
    - "a deterministic polynomial space construction for eps nets under any norm"
    - "lattice sparsification and the approximate closest vector problem"
    - "covering cubes and the closest vector problem"
    - "enumerative lattice algorithms in any norm via m ellipsoid coverings"

Connected through hyperedge HE-2 (induced by source paper "fine grained hardness of cvp p everything that we can prove and nothing else"):
  with members:
    - "gap s eth hardness of svp"
    - "on the quantitative hardness of cvp"

Connected through hyperedge HE-3 (induced by source paper "on the quantitative hardness of cvp"):
  with members:
    - "on problems as hard as cnf sat"
    - "strong eth breaks with merlin and arthur short non interactive proofs of batch evaluation"
    - "a birthday repetition theorem and complexity of approximating dense csps"
    - "solving the closest vector problem in 2 n time the discrete gaussian strikes again"
    - "powers of tensors and fast matrix multiplication"
    - "edit distance cannot be computed in strongly subquadratic time unless seth is false"
    - "solving the shortest vector problem in 2 n time via discrete gaussian sampling"
    - "short paths on the voronoi graph and the closest vector problem with preprocessing"

Connected through hyperedge HE-4 (induced by source paper "lattice sparsification and the approximate closest vector problem"):
  with members:
    - "tensor based hardness of the shortest vector problem to within almost polynomial factors"
    - "covering cubes and the closest vector problem"
    - "enumerative lattice algorithms in any norm via m ellipsoid coverings"
    - "improved analysis of kannan s shortest lattice vector algorithm"

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)