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 "vehicle routing with subtours"):
  Abstract: When delivering items to a set of destinations, one can save time and cost by passing a subset to a sub-contractor at any point en route. We consider a model where a set of items are initially loaded in one vehicle and should be distributed before a given deadline {\Delta}. In addition to travel time and time for deliveries, we assume that there is a fixed delay for handing over an item from one vehicle to another. #R##N#We will show that it is easy to decide whether an instance is feasible, i.e., whether it is possible to deliver all items before the deadline {\Delta}. We then consider computing a feasible tour of minimum cost, where we incur a cost per unit distance traveled by the vehicles, and a setup cost for every used vehicle. Our problem arises in practical applications and generalizes classical problems such as shallow-light trees and the bounded-latency problem. #R##N#Our main result is a polynomial-time algorithm that, for any given {\epsilon} > 0 and any feasible instance, computes a solution that delivers all items before time (1+ {\epsilon}){\Delta} and has cost O(1 + 1 / {\epsilon}) OPT, where OPT is the minimum cost of any feasible solution. #R##N#We show that our result is best possible in the sense that any improvement would lead to progress on 25-year-old questions on shallow-light trees.

Includes members:
  Member "new inapproximability bounds for tsp":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "a quasi polynomial algorithm for well spaced hyperbolic tsp")
  Member "approximation algorithms for regret bounded vehicle routing and applications to distance constrained vehicle routing":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "a constant factor approximation for directed latency in quasi polynomial time")
  Member "balancing minimum spanning trees and shortest path trees":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "distributed construction of light networks")

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)