human: Given a hyperedge-centered hypergraph: <hypergraph>, where the center hyperedge is induced by one source paper and its member nodes are the cited papers.

Details of the hypergraph:
Center hyperedge (induced by source paper "approximate distance oracles for planar graphs with improved query time space tradeoff"):
  Abstract: We consider approximate distance oracles for edge-weighted n-vertex undirected planar graphs. Given fixed epsilon > 0, we present a (1+epsilon)-approximate distance oracle with O(n(loglog n)^2) space and O((loglog n)^3) query time. This improves the previous best product of query time and space of the oracles of Thorup (FOCS 2001, J. ACM 2004) and Klein (SODA 2002) from O(n log n) to O(n(loglog n)^5).

Includes members:
  Member "approximate distance oracle with constant query time":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "almost shortest paths and pram distance oracles in weighted graphs")
  Member "approximate distance oracles with improved query time":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "almost shortest paths and pram distance oracles in weighted graphs")
  Member "approximate distance oracles with improved preprocessing time":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "faster approximation algorithms for computing shortest cycles on weighted graphs")
  Member "linear space approximate distance oracles for planar bounded genus and minor free graphs":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "holiest minimum cost paths and flows in surface graphs")
  Member "exact distance oracles for planar graphs":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "a divide and conquer algorithm for two point l_1 shortest path queries in polygonal domains")
  Member "ramsey partitions and proximity data structures":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "labelings vs embeddings on distributed representations of distances")

Question: Please tell me which class the source paper 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)