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Sign inExample 1
Switch on sprinklers 1, 4 and 7.
Example 2
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Struggling is where the learning happens. Open this once you have genuinely tried, or once the hints have run out.
O(n) time · O(n) space
Input. Run your code to watch it work on this input, one line at a time.
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Run your code against the sample tests, or submit to run the full suite.
Every sprinkler is broken.