Theoretical Computer Science 37th National Conference, NCTCS 2019, L

This book constitutes the thoroughly refereed proceedings of the National Conference of Theoretical Computer Science, NCTCS 2019, held in Lanzhou, China, in August 2019.  The 11 full papers presented were carefully reviewed and selected from 28 submi

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ommunications in Computer and Information Science

Theoretical Computer Science 37th National Conference, NCTCS 2019 Lanzhou, China, August 2–4, 2019 Revised Selected Papers

1069

Communications in Computer and Information Science

1069

Commenced Publication in 2007 Founding and Former Series Editors: Phoebe Chen, Alfredo Cuzzocrea, Xiaoyong Du, Orhun Kara, Ting Liu, Krishna M. Sivalingam, Dominik Ślęzak, Takashi Washio, and Xiaokang Yang

Editorial Board Members Simone Diniz Junqueira Barbosa Pontifical Catholic University of Rio de Janeiro (PUC-Rio), Rio de Janeiro, Brazil Joaquim Filipe Polytechnic Institute of Setúbal, Setúbal, Portugal Ashish Ghosh Indian Statistical Institute, Kolkata, India Igor Kotenko St. Petersburg Institute for Informatics and Automation of the Russian Academy of Sciences, St. Petersburg, Russia Junsong Yuan University at Buffalo, The State University of New York, Buffalo, NY, USA Lizhu Zhou Tsinghua University, Beijing, China

More information about this series at http://www.springer.com/series/7899

Xiaoming Sun Kun He Xiaoyun Chen (Eds.) •



Theoretical Computer Science 37th National Conference, NCTCS 2019 Lanzhou, China, August 2–4, 2019 Revised Selected Papers

123

Editors Xiaoming Sun Institute of Computing Technology Chinese Academy of Sciences Beijing, China

Kun He Huazhong University of Science and Technology Wuhan, China

Xiaoyun Chen Lanzhou University Lanzhou, China

ISSN 1865-0929 ISSN 1865-0937 (electronic) Communications in Computer and Information Science ISBN 978-981-15-0104-3 ISBN 978-981-15-0105-0 (eBook) https://doi.org/10.1007/978-981-15-0105-0 © Springer Nature Singapore Pte Ltd. 2019 This work is subject to copyright. All rights are reserved by the Publisher, whether the whole or part of the material is concerned, specifically the rights of translation, reprinting, reuse of illustrations, recitation, broadcasting, reproduction on microfilms or in any other physical way, and transmission or information storage and retrieval, electronic adaptation, computer software, or by similar or dissimilar methodology now known or hereafter developed. The use of general descriptive names, registered names, trademarks, service marks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use. The publisher, the authors and the editors are safe to assume that the advice and information in this book are believed to be true and accurate at the date of publication. Neither the publisher nor the authors or the editors give a warranty, expressed or implied, with respect to the material contained herein or for any errors or omissions that may have been made. The publisher remains neutral with regard to jurisdictional claims in published maps and institutional affiliations. This Springer imprint is published by the registered company Springer Nature Singapore Pte Ltd. The registered company address is: 152 Beach Road, #21-01/04 Gateway East, Singap