Hi,

For this problem I have a set S with initially 0 strings.

There are three types of queries:

1. Add a string to set S with id = queryId.
2. Remove the string from set S with id = removeId.
3. Read a string M and print all strings in set S that have M as substring.

Let N be the size of S.

How would I solve this efficiently? I hope to reach a complexity of O((length of search string) + N) for query 3 and O(length of string) for queries 1 and 2. Is this possible, with for example a suffix tree?