Directory Traversal 2018 gold

#1

Could someone help explain the problem? I don’t seem to understand the output for the sample case. Specifically, I don’t really get where they got the number 42 as the sum of the path lengths.

Could someone help explain this? Thanks in advance.

Problem link

#2

What don’t you understand about it? The length of the total characters used to have references to all the files is exactly 42.