Editorial for April Fools' Day Contest 1 P4 - Choosing Choosily


Remember to use this editorial only when stuck, and not to copy-paste code from it. Please be respectful to the problem author and editorialist.
Submitting an official solution before solving the problem yourself is a bannable offence.

Author: maxcruickshanks

Look for a good number that no one else would choose.

Time Complexity: \mathcal{O}(1)


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