Corrected wrong Dijkstra priority queue implementation #909

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poyea merged 4 commits intoTheAlgorithms:masterfrom

ziyzhu:master

Jun 23, 2019

Commits on Jun 15, 2019

Corrected wrong DFS implementation
ziyzhu
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Commits on Jun 17, 2019

Merge branch 'master' of https://github.com/TheAlgorithms/Python
ziyzhu
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Commits on Jun 19, 2019

Merge branch 'master' of https://github.com/TheAlgorithms/Python
ziyzhu
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changed list into hash set for dijkstra priority queue implementation.
ziyzhu
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