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: "croft a scalable three dimensional parallel fast fourier transform fft implementation for high performance clusters"
  Abstract: The FFT of three dimensional (3D) input data is an important computational kernel of numerical simulations and is widely used in High Performance Computing (HPC) codes running on large number of processors. Although the efficient parallelization of 3D FFT has been largely investigated over the last few decades, performance and scalability of parallel 3D FFT methods on new generation hardware architecture for HPC is a major challenge. Looking at upcoming exascale cluster architectures, the conventional parallel 3D FFT calculations on HPC needs improvement for better performance. In this paper, we present CDACs three dimensional Fast Fourier Transform (CROFT) library which implements three dimensional parallel FFT using pencil decomposition. To exploit the multithreading capabilities of hardware without affecting performance, CROFT is designed to use hybrid programming model of OpenMP and MPI. CROFT implementation has a feature of overlapping compute and memory I/O with MPI communication. Depending on the number of processes used, CROFT shows performance improvement of about 51 to 42 percent as compared to FFTW3 library.

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.DC(Distributed, Parallel, and Cluster Computing)