C How to Program, 8th Global Edition
https://scanlibs.com/c-how-program-8th-global/#download
Calculus: Early Transcendentals (미분적분학(7판)
http://www.slader.com/textbook/9788961057134-calculus-early-transcendentals-7-7th-korean-edition/
Data Structures and Algorithms in Python [Goodrich, Tamassia & Goldwasser
Data Structures and Algorithms in Python [Goodrich, Tamassia & Goldwasser 2013-03-18].pdf
Introduction to Algorithms, Third Edition
Introduction to Algorithms.pdf