More understandable description

[rscprof]

It need to describe arguments in 3 and 4 tasks more deeply.

In task 4 2-dimension array is describe as tuple, but there are many options to write 2d array in tuple (tuple of slices (if it is a slice, so it need to describe the way of serialization of every char); tuple of tuples and many another).

In task 3 there are the code of migration and the code of smart contract, but there aren't any description about enumeration functions inside code (inside slices). Is migrate_one is only one function inside slice or not. In new code of contracts enumeration of functions can change, so you can't call the function process_message...

[JunaidBabu]

for task 4, I think it is a tuple of slices? because it said "The maze will be passed without spaces."
it's also confusing that n is before m. (int, int, int, tuple) solve(int n, int m, tuple maze)