Pdf link of some important books for competetive programming are given in this blog: 1.Competetive Programmer's handbook-Antii Laaksonen https://drive.google.com/open?id=1HYhuPKvDTI-QpKR3l91laj3Boa_XQJ9d 2.Competetive Programming 3-Steven Halim,Felix Halim. https://drive.google.com/open?id=1xhFrHJ_husDMHPUWP53meq3Hcsz23Nid 3.Principles of algorithmic problem solving-Johan Sannemo. http://www.csc.kth.se/~jsannemo/slask/main.pdf 4.Crash course coding companion https://github.com/alwayswimmin/cs_guide/blob/master/guide.pdf