This code create full path which is used to search a TREE. For example:
From To
A B
would exchange the position and get :
From To
A B
B A
And the code generated WANT table is a long story to explain.
I have no time to explain the details to you.
If you are familiar with Hash Table, I think you could understand the mystery as long as you read it with a lot of time .
Good Luck.
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