There a lot of books for algorithms, data structures. But for competitive programming need good math knowledge, also,
Which math books are best for competitive programming ??
I mean, there algebra, number theory, statistics, probability, arithmetic, computation geometry and etc...
This is (Conrcete-Mathematics) already good for me, now.
UPD: Number theory book. Rosen K.H. Elementary Number Theory
UPD-2: https://artofproblemsolving.com Thanks Emilbek for good resource.
UPD-3: Matters Computational Thanks anta, for comment here
Thnx.