As a programmer, mathematics is important basic knowledge to study some topic, especially Algorithm. Many website, and my fellows suggest me to study Discrete Mathematics before go to Algorithm, so I want to know which Discrete Mathematics is suitable for my need?

As a programmer, mathematics is important basic knowledge to study some topics, especially Algorithms. Many websites, and my fellows suggest me to study Discrete Mathematics before going to Algorithms, so I want to know which Discrete Mathematics book is suitable for my needs?