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 discrete and bounded envy free cake cutting protocol for any number of agents"
  Abstract: We consider the well-studied cake cutting problem in which the goal is to find an envy-free allocation based on queries from $n$ agents. The problem has received attention in computer science, mathematics, and economics. It has been a major open problem whether there exists a discrete and bounded envy-free protocol. We resolve the problem by proposing a discrete and bounded envy-free protocol for any number of agents. The maximum number of queries required by the protocol is $n^{n^{n^{n^{n^n}}}}$. We additionally show that even if we do not run our protocol to completion, it can find in at most $n^3{(n^2)}^n$ queries a partial allocation of the cake that achieves proportionality (each agent gets at least $1/n$ of the value of the whole cake) and envy-freeness. Finally we show that an envy-free partial allocation can be computed in at most $n^3{(n^2)}^n$ queries such that each agent gets a connected piece that gives the agent at least $1/(3n)$ of the value of the whole cake.

Connected through hyperedge HE-1 (induced by source paper "maximin fairness with mixed divisible and indivisible goods"):
  with members:
    - "computing envy freeable allocations with limited subsidies"
    - "one dollar each eliminates envy"
    - "fair division of mixed divisible and indivisible goods"
    - "weighted maxmin fair share allocation of indivisible chores"
    - "maximin share allocations on cycles"
    - "an improved approximation algorithm for maximin shares"
    - "an algorithmic framework for approximating maximin share allocation of chores"
    - "strategyproof and approximately maxmin fair share allocation of chores"

Connected through hyperedge HE-2 (induced by source paper "consenus halving does it ever get easier"):
  with members:
    - "the hairy ball problem is ppad complete"
    - "computing exact solutions of consensus halving and the borsuk ulam theorem"
    - "on the complexity of modulo q arguments and the chevalley warning theorem"
    - "fair and efficient cake division with connected pieces"
    - "the classes ppa k existence from arguments modulo k"
    - "the complexity of splitting necklaces and bisecting ham sandwiches"
    - "consensus halving is ppa complete"
    - "hardness results for consensus halving"

Connected through hyperedge HE-3 (induced by source paper "fairness and efficiency in cake cutting with single peaked preferences"):
  with members:
    - "obvious manipulations in cake cutting"
    - "fair division with minimal sharing"
    - "monotonicity and competitive equilibrium in cake cutting"
    - "fair cake cutting in practice"

Connected through hyperedge HE-4 (induced by source paper "envy freeness up to any item with high nash welfare the virtue of donating items"):
  with members:
    - "comparing approximate relaxations of envy freeness"
    - "on fair division of indivisible items"
    - "approximation algorithms for computing maximin share allocations"
    - "almost envy freeness with general valuations"
    - "approximating the nash social welfare with budget additive valuations"
    - "finding fair and efficient allocations"
    - "convex program duality fisher markets and nash social welfare"
    - "nash social welfare for indivisible items under separable piecewise linear concave utilities"

Connected through hyperedge HE-5 (induced by source paper "developments in multi agent fair allocation"):
  with members:
    - "from matching with diversity constraints to matching with regional quotas"
    - "fair division with minimal sharing"
    - "fairly allocating many goods with few queries"
    - "fair knapsack"
    - "competitive division of a mixed manna"
    - "approximation algorithms for computing maximin share allocations"
    - "proportionally representative participatory budgeting axioms and algorithms"
    - "fair mixing the case of dichotomous preferences"

Connected through hyperedge HE-6 (induced by source paper "computing exact solutions of consensus halving and the borsuk ulam theorem"):
  with members:
    - "approximating the existential theory of the reals"
    - "the complexity of splitting necklaces and bisecting ham sandwiches"
    - "an improved envy free cake cutting protocol for four agents"
    - "consensus halving is ppa complete"
    - "hardness results for consensus halving"
    - "recognition and complexity of point visibility graphs"
    - "a discrete and bounded envy free cake cutting protocol for four agents"
    - "inapproximability of nash equilibrium"

Connected through hyperedge HE-7 (induced by source paper "an algorithmic framework for approximating maximin share allocation of chores"):
  with members:
    - "envy freeness up to any item with high nash welfare the virtue of donating items"
    - "a little charity guarantees almost envy freeness"
    - "weighted maxmin fair share allocation of indivisible chores"
    - "an improved approximation algorithm for maximin shares"
    - "strategyproof and approximately maxmin fair share allocation of chores"
    - "fair allocation of combinations of indivisible goods and chores"
    - "approximation algorithms for computing maximin share allocations"
    - "almost envy freeness with general valuations"

Connected through hyperedge HE-8 (induced by source paper "fair division of mixed divisible and indivisible goods"):
  with members:
    - "efx exists for three agents"
    - "an improved approximation algorithm for maximin shares"
    - "monotonicity and competitive equilibrium in cake cutting"
    - "truthful fair division without free disposal"
    - "approximation algorithms for computing maximin share allocations"
    - "almost envy freeness with general valuations"
    - "the query complexity of cake cutting"
    - "a discrete and bounded envy free cake cutting protocol for four agents"

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)