Recently, I felt lack of knowledge and techniques for solving various number of cases, probability and expected number.
I did not managed to solve a lot of problems including
- Dstorv,
- Gem Island,
- Do I wanna know,
- Solitaire, and
- BBQ Hard.
(For the first three problems, I did not managed to solve problem in contest. And, I think it lead to unsatisfying results.)
I really want to be good at this kind of problems, and could anyone can give sufficient number of problems, or materials (including book) to improve my skill?
