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 "computational complexity of games and puzzles"):
  Abstract: In this thesis, we survey techniques and results from the study of Complexity Theory and Games. We then apply these techniques to obtain new results for previously unstudied games. Our contributions in the games Hexiom, Cut the Rope, and Back to Bed may be helpful in further studies by exploiting structure common to several games. We also highlight some interesting paths for further study related to uncertainty that have yet to receive thorough study given their prevalence in today's games.

Includes members:
  Member "the computational complexity of portal and other 3d video games":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "the computational complexity of angry birds")
  Member "combinatorial game complexity an introduction with poset games":
    also connected through other hyperedges:
      (none)
  Member "classic nintendo games are computationally hard":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "the computational complexity of angry birds")
  Member "lemmings is pspace complete":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "the computational complexity of angry birds")
  Member "gaming is a hard job but someone has to do it":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "the computational complexity of angry birds")
  Member "spider solitaire is np complete":
    also connected through other hyperedges:
      (none)
  Member "tetris is hard even to approximate":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "the computational complexity of angry birds")

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.CC(Computational Complexity)