Pascal language. Then you can learn simple algorithms and data structures with the same set of training materials of the Youth Informatics Olympic Competition.
Data structure and algorithm design-pascal language. If the first two books are completed, then it is recommended to study the practical counseling series of the Olympic Games of Youth Informatics.
Advanced data structure (mostly pascal, although some of them are c++, but this level can basically understand some simple c++ codes), and other advanced algorithm knowledge can also be used in some specialized books of the practice counseling series of youth informatics Olympic competition (dynamic programming and its application, graph theory and its application), and the advanced ones are black books.
Olympic Competition of Algorithm Art and Informatics
Yes In addition, it is suggested that when learning every knowledge, you can look up some examples and tutorials on the internet, so that you can better understand it with learning. Hope to adopt, thank you!