Final answer:
The code encountered a ValueError when the user entered 'three' as the number of apples.
Step-by-step explanation:
The type of error that occurred in this code is a ValueError. When the user entered 'three' as the number of apples, the code tried to convert it to an integer using the int() function. However, since 'three' is not a valid integer, a ValueError is raised. To fix this error, the user should enter a valid integer instead of a string.
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