3 ms·
OP clarified, but I understood that as a valid tree without a path to empty node. I don't have an example, but with grammar weird enough it sounds plausible. Es
by integralid 7mo ago
OP clarified, but I understood that as a valid tree without a path to empty node. I don't have an example, but with grammar weird enough it sounds plausible. Especially if some form of type checking is involved, as OP mentioned.