The number of prompts

[Xiaofu233]

Hi, thanks for the excellent work!

I am confused by the number of prompts, i.e., M^2 -1. When M=3, why the number of prompts is 8? Suppose there are a, b, c, modalities, the prompts for only a, only b, only c, a+b, b+c, a+c, a+b+c are 7.

Looking forward to the reply, thanks again!

[LinnHY]

maybe it contain a situation that all the modalities are missing

[IcecreamArtist]

I am also confused in this problem. It seems the answer should be 2^M-1, not M^2-1. it is not quadratic, but exponential.