Sam in the cave

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Archaeologist Sam is inside a historical cave which is in the form of an N X M matrix. He has already researched about this cave and knows the complete map of the cave. Cave is divided into N X M blocks. Each block is either a path or a wall. The cave has only one terminal point, from where one can enter the cave or exit from the cave given by (Xe, Ye). Sam is currently at a point (Xi, Yi), where

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solution.cppC++17

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