Is secure add / multiple support 3 parties? Is sucure compare (百万富翁问题) support 2 parties?

[hqsh]

Is your feature request related to a problem? Please describe. Is secure add / multiple support 3 parties? Is sucure compare (百万富翁问题) support 2 parties? If FATE is supported now. Could you give me some documents to know how to use them? Thank you.

Describe the solution you'd like None.

Describe alternatives you've considered None.

Additional context None.