Updated Stack#2414

Merged

cclauss merged 4 commits intoTheAlgorithms:masterfrom

realDuYuanChao:dev

Sep 13, 2020

Commits on Sep 10, 2020

* Added type hints
realDuYuanChao
committed
updating DIRECTORY.md

github-actions
authored and
github-actions
committed

Commits on Sep 13, 2020