38 lines
1.4 KiB
Markdown
38 lines
1.4 KiB
Markdown
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# Hints
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## General
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- The bird count per day is stored in a field named `birdsPerDay`.
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- The bird count per day is an array that contains exactly 7 integers.
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## 1. Check what the counts were last week
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- As we keep the last week we just need to return the last week values.
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## 2. Check how many birds visited today
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- Remember that the counts are ordered by day from oldest to most recent, with the last element representing today.
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- Accessing the last element can be done either by using its (fixed) index (remember to start counting from zero) or by calculating its index using the array's size.
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## 3. Increment today's count
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- Set the element representing today's count to today's count plus 1.
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## 4. Check if there was a day with no visiting birds
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- The array can be iterated over using a `for` loop.
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- Another solution is to use the Java Stream Api.
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## 5. Calculate the number of visiting birds for the first number of days
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- A variable can be used to hold the count for the number of visiting birds.
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- The array can be iterated over using a `for` loop.
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- The variable can be updated inside the loop.
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- Remember: arrays are indexed from `0`.
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## 6. Calculate the number of busy days
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- A variable can be used to hold the number of busy days.
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- The array can be iterated over using a `foreach` loop.
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- The variable can be updated inside the loop.
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- A conditional statement can be used inside the loop.
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