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: "profile based optimal matchings in the student project allocation problem"
  Abstract: In the Student / Project Allocation problem (SPA) we seek to assign students to individual or group projects offered by lecturers. Students provide a list of projects they find acceptable in order of preference. Each student can be assigned to at most one project and there are constraints on the maximum number of students that can be assigned to each project and lecturer. We seek matchings of students to projects that are optimal with respect to profile, which is a vector whose rth component indicates how many students have their rth-choice project. We present an efficient algorithm for finding a greedy maximum matching in the SPA context - this is a maximum matching whose profile is lexicographically maximum. We then show how to adapt this algorithm to find a generous maximum matching - this is a matching whose reverse profile is lexicographically minimum. Our algorithms involve finding optimal flows in networks. We demonstrate how this approach can allow for additional constraints, such as lecturer lower quotas, to be handled flexibly. Finally we present results obtained from an empirical evaluation of the algorithms.

Connected through hyperedge HE-1 (induced by source paper "a novel initialisation based on hospital resident assignment for the k modes algorithm"):
  with members:
    - "evolutionary dataset optimisation learning algorithm quality through evolution"

Connected through hyperedge HE-2 (induced by source paper "an algorithm for strong stability in the student project allocation problem with ties"):
  with members:
    - "a 3 2 approximation algorithm for the student project allocation problem"
    - "super stability in the student project allocation problem with ties"
    - "an integer programming approach to the student project allocation problem with preferences over projects"

Connected through hyperedge HE-3 (induced by source paper "a near pareto optimal approach to student supervisor allocation with two sided preferences and workload balance"):
  with members:
    - "a 3 2 approximation algorithm for the student project allocation problem"

Connected through hyperedge HE-4 (induced by source paper "super stability in the student project allocation problem with ties"):
  with members:
    - "a 3 2 approximation algorithm for the student project allocation problem"
    - "an integer programming approach to the student project allocation problem with preferences over projects"

Connected through hyperedge HE-5 (induced by source paper "matchings with lower quotas algorithms and complexity"):
  with members:
    - "not so easy problems for tree decomposable graphs"

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)