Feature/delf mar1#186

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Delf-Lee wants to merge 5 commits intomasterfrom

feature/delf-mar1

Commits on Feb 24, 2021

Update programmers skill check 3
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Commits on Mar 1, 2021

Commits on Mar 2, 2021

Update hacker rank: Ice Cream Parlor(first try)
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Commits on Mar 3, 2021

Update hacker rank: Ice Cream Parlor
Delf-Lee
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