The Code of POIM. Please Cite this paper: @InProceedings{10.1007/978-3-030-72062-9_55, author="Wu, Kai and Liu, Jing and Wang, Chao and Yuan, Kaixin", editor="Ishibuchi, Hisao and Zhang, Qingfu and Cheng, Ran and Li, Ke and Li, Hui and Wang, Handing and Zhou, Aimin", title="Pareto Optimization for Influence Maximization in Social Networks", booktitle="Evolutionary Multi-Criterion Optimization", year="2021", publisher="Springer International Publishing", address="Cham", pages="697--707"}