Add algorithm Breadth-first shortest path#572

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ruppysuppy merged 3 commits intoTheAlgorithms:masterfrom

algobytewise:add-BreadthFirstShortestPath

Feb 28, 2021

Commits on Feb 25, 2021

Add algorithm Breadth-first shortest path
algobytewise
authored

Commits on Feb 27, 2021

use set to keep track of visited nodes, updated description
algobytewise
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Commits on Feb 28, 2021

fix: updated description comment
ruppysuppy
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