Concept understanding:
Automatic assembly: Spring uses dependency injection (DI) to complete the assignment of dependencies on each component in the IOC container;
You can use the @Auto
Tag: protected
@codeforces – [email protected] Vladislav and a Great Legend
Contents
Give Determine a tree T with n points. For each non-empty point set X, define f(X) as the number of edges of the smallest connected block containing all points in X.
Given another