Backslash at the end of the line within comment escaped by dot to avoid GCC warning
-- \ Uo ^ \ U1 ^
-- \ | n \ | n
-- Surf ====\======|=== ====\======|===
- -- \ \
- -- \ \
- -- U1 \ Uo \
+ -- \ . \ .
+ -- \ . \ .
+ -- U1 \ . Uo \ .
--
--
-- ( In ) ( Out )
-- the path is an exploration of the tree which contains
-- the connexions and their reverses.
-- if the tree of connexions is
- -- A
- -- / \
- -- B E
- -- / \ \
- -- C D F
+ -- A
+ -- / |
+ -- B E
+ -- / | |
+ -- C D F
--
-- the path is A->B, B->C, C->B, B->D, D->B, B->A, A->E,
-- E->F, F->E, E->A.