Editorial for Mock CCC '20 Contest 1 J4 - A Binary Problem
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.
For 5 marks, a quadratic brute force suffices.
For full credit, imagine sweeping over the houses from left-to-right and from right-to-left, tracking the minimum distance to a house in that direction. The answer is therefore the sum of the minimum of these two values at each index. Be careful of overflow.
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