Please cite:
@inproceedings{gong2019exact,
title={Exact-k recommendation via maximal clique optimization},
author={Gong, Yu and Zhu, Yu and Duan, Lu and Liu, Qingwen and Guan, Ziyu and Sun, Fei and Ou, Wenwu and Zhu, Kenny Q},
booktitle={Proceedings of the 25th ACM SIGKDD International Conference on Knowledge Discovery \& Data Mining},
pages={617--626},
year={2019}
}