Books You should have
Book for D.S.A with c
this book explains the concept of every topic in detail include all the program are written in it. You can also start this book if you don't have a grip on c language.
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Book a C programmer should have
here is the link to download the book:- click here
Warning go for this book only when if you have a little or basic knowledge of c programming or any other programming languages due to the contained in this book is so dense.