What books would you recommend for data structures and algorithms in C language?
It would be good if recommended books are books of solved problems.

What books would you recommend for data structures and algorithms in C language?

I often recommend Algorithms in C by Robert Sedgewick. The concepts are well written and researched, and this is the biggest benefit of the book. A subtle benefit is that the code is both horribly formatted and severely broken. Fixing it is an excellent exercise for a budding C programmer. ;)

It would be good if recommended books are books of solved problems.

I'm not sure I understand this requirement. Could you elaborate?

Try this:

Lovely, a seminar that pushes C as a road block to C++, Java, and C#... Personally, I'd rather have a book or site that treats C as a real and unique language, which it is. ;)

And this: Six Fast Steps to Programming in C

Okaaay. Let me guess, you wrote that. ;)