completed all challenges#3

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schirhei wants to merge 6 commits intogameofapps:masterfrom

schirhei:master

Commits on Apr 27, 2019

finished Android application
schirhei
committed

Commits on Apr 28, 2019

Merge pull request #1 from schirhei/android
schirhei
authored

Commits on Apr 30, 2019

finished q1
schirhei
committed
Merge pull request #2 from schirhei/algo
schirhei
authored
finished q2
schirhei
committed
Merge pull request #3 from schirhei/algo2
schirhei
authored