推荐一本书《Cracking the code interview》

Now in the 5th edition, Cracking the Coding Interview gives you the interview preparation you need to get the top software developer jobs. This is a deeply technical book and focuses on the software engineering skills to ace your interview. The book is over 500 pages and includes 150 programming interview questions and answers, as well as other advice.

关于这本书有一个特别好的博客 Hawstein's blog写出了自己对问题的理解，C++代码，许多问题给出了两种以上答案