Return the number of days in a given month in 2017. If the input is not a valid month number, return -1.

Examples:

Input: m = 1
Outpu: d = 31

Input:  m = 2
Output: d = 28

Input:  m = 13
Output: d = -1

You cannot use IF statements

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Last Solution submitted on Apr 02, 2026

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Boldizsar Vasilis Bellos Matthew Bolyard Lorenzo

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