I think, you're wrong. The format of output data is rather clear, and
the only thing, not mentioned in the problem statement is that one
has to output [.n] when current date is less than 10.
IMHO problem 1177 is rather worse from this point of view.
Jesus Christ !!! I had thought that maybe that was why (putting a space to the left between the brackets when the number had a single digit) that WA had in test2, but I didn't believe it. In fact I assumed that in this problem the spaces were irrelevant.
I find it terrible!, "[1]" incorrect and "[ 1] ([.1])" correct, for such nonsense one should not have a WA, much less if the problem does not specify it explicitly.
And it is a pity because it is a beautiful problem.
Thanks for clarifying this.