Editorial for Another Contest 4 Problem 6 - One Billion Views
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.
Submitting an official solution before solving the problem yourself is a bannable offence.
The function to implement is to return true iff is happy, as clued by the problem title and problem statement.
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