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Add Topological Sort (#1302)

* add topological sort

* fix topological sort?

* running black

* renaming file
P
Phyllipe Bezerra committed
455509acee831cb4a8c3bf9d495fd0e296825c68
Parent: ddb0949
Committed by Christian Clauss <cclauss@me.com> on 10/18/2019, 6:13:58 AM