Long story short, interactive problems have become a very popular problem type in various judges, and appear very frequently on different coding contests. However, it is very inconvenient for users to search problems for practice unless u look closely upon every problem in the problemset, which is impossible to do given that there are now 50 pages of problems -.-
Therefore, I believe an interactive problem tag should be added to distinguish them from the traditional problem types.
Sorry for bad grammar, idk English
