Yeah A is the temporal.
For simplicity, I can fix C.
And then I can do padding along A, but i dont want to do that because i dont know what would be the largest A that I will have. But yeah there are some ways to deal with it.
Regardless of solution of how to deal with this specific situation, the error itself is saying that: Sizes of tensors must match except in dimension 0, meaning i can have permuted the dimensions to bring A to dimension 0 and have the rest the same, meaning
0 torch.Size([90, 1, 3,  10, 10])
1 torch.Size([ 211, 1, 3, 10, 10])
but even doing this will give me an error