49 lines
1.1 KiB
Markdown
49 lines
1.1 KiB
Markdown
# Swimming Pool
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Suppose a swimming pool blueprint can be represented as a 2D array, where **1**s represent the pool and **0**s represent the rest of the backyard.
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```text
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[[0, 0, 0, 0, 0, 0, 0, 0],
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[0, 1, 1, 1, 1, 1, 0, 0],
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[0, 1, 1, 1, 1, 1, 0, 0],
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[0, 1, 1, 0, 0, 0, 0, 0],
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[0, 0, 0, 0, 0, 0, 0, 0]]
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// Legitimate
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```
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Suppose a pool is considered legitimate if it does not touch any of the four borders in this 2D array.
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```text
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[[1, 1, 0, 0, 0, 0, 0, 0],
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[1, 1, 1, 1, 1, 1, 0, 0],
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[0, 1, 1, 1, 1, 1, 0, 0],
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[0, 0, 0, 0, 0, 0, 0, 0]]
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// Illegitimate!
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// The 1s are touching both the left "fence" and the upper "fence".
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```
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Create a function that returns true if the pool plan is legitimate, and false otherwise.
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## Examples
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```text
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isLegitimate([
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[0, 0, 0, 0, 0, 0, 0, 0],
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[0, 0, 1, 1, 1, 0, 0, 0],
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[0, 1, 1, 1, 1, 1, 0, 0],
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[0, 0, 0, 0, 0, 0, 0, 0]
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]) ➞ true
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isLegitimate([
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[0, 0, 0, 0, 0, 0, 0, 0],
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[0, 0, 1, 1, 1, 0, 0, 0],
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[0, 1, 1, 1, 1, 1, 0, 0],
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[0, 0, 1, 1, 1, 0, 0, 0]
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]) ➞ false
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isLegitimate([
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[0, 0, 0, 0, 0],
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[0, 1, 1, 1, 0],
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[0, 1, 1, 1, 0],
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[0, 0, 0, 0, 0]
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]) ➞ true
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``` |