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Added A* algorithm (#1913)

* a* algorithm

* changes after build error

* intent changes

* fix after review

* ImportMissmatchError

* Build failed fix

* doctest changes

* doctest changes
J
Jeffin Francis committed
77c3e5b74b679930b7d536423e7393b211888080
Parent: eef6393
Committed by GitHub <noreply@github.com> on 5/9/2020, 7:07:36 PM