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 "smart contract development in practice trends issues and discussions on stack overflow"):
  Abstract: Blockchain based platforms are emerging as a transformative technology that can provide reliability, integrity, and auditability without trusted entities. One of the key features of these platforms is the trustworthy decentralized execution of general-purpose computation in the form of smart contracts, which are envisioned to have a wide range of applications from finance to the Internet of Things. As a result, a rapidly growing and active community of smart contract developers has emerged in recent years. A number of research efforts have investigated the technological challenges that smart contract developers face. However, very little is known about the community itself, about the developers, and about the issues that they discuss and care about. To address this gap, we study the online community of smart contract developers on Stack Overflow. We provide insight into the topics that they discuss, their technological and demographic background, and their awareness of security issues and tools. Our results show that the community of smart contract developers is very active and growing rapidly, in comparison with the general user population. However, a large fraction of smart contract related questions remain unanswered, which can pose a real threat to the viability of a sustainable community and may indicate gaps in community knowledge. Further, we observe very limited discussion of security related topics, which is concerning since smart contracts in practice are plagued by security issues.

Includes members:
  Member "a survey on ethereum systems security vulnerabilities attacks and defenses":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "smart contract development from the perspective of developers topics and issues discussed on social media")
  Member "when energy trading meets blockchain in electrical power system the state of the art":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "smart contract development from the perspective of developers topics and issues discussed on social media")
  Member "slither a static analysis framework for smart contracts":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "smart contract development from the perspective of developers topics and issues discussed on social media")
  Member "transax a blockchain based decentralized forward trading energy exchange for transactive microgrids":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "safe and private forward trading platform for transactive microgrids")
  Member "what are the actual flaws in important smart contracts and how can we find them":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "smart contract development from the perspective of developers topics and issues discussed on social media")
  Member "verisolid correct by design smart contracts for ethereum":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "smart contract development from the perspective of developers topics and issues discussed on social media")
  Member "manticore a user friendly symbolic execution framework for binaries and smart contracts":
    also connected through other hyperedges:
      - Hyperedge HE-7 (induced by source paper "smart contract development from the perspective of developers topics and issues discussed on social media")
  Member "tool demonstration fsolidm for designing secure ethereum smart contracts":
    also connected through other hyperedges:
      - Hyperedge HE-8 (induced by source paper "an overview on smart contracts challenges advances and platforms")

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.CY(Computers and Society)