Solutions for Chapter 1#547

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guntbert wants to merge 6 commits intokowainik:mainfrom

Commits on Oct 13, 2022

Part 1 for Chapter 1
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Commits on Oct 14, 2022

Finished Chapter1
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Kleinigkeiten...
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Handle negative numbers correctly
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Commits on Oct 27, 2022

Omit redundant brackets

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Fix firstDigit for negative numbers
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