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| +----------------+
| BFS |
| |
|+iteratelist()=0|
+----------------+
^
/_\
|
/ | \
/ | \
/------- | -------\
/ | \
/ | \
/ | \
+--------------+ +--------------+ +--------------+
| ARRAY | |SGL LINKED LST| |DBL LINKED LST|
| | | | | |
|+iteratelist()| |+iteratelist()| |+iteratelist()|
+--------------+ +--------------+ +--------------+
|