maksar
/ solution.rb
Created
June 18, 2019 19:25
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| def except(input) | |
| input.map.with_index.with_object([]) { |(_e, i), r| r << (r.last || 1) * (i.zero? ? 1 : input[i - 1]) } | |
| end | |
| def solution(input) | |
| except(input).zip(except(input.reverse).reverse).map { |pair| pair.inject(:*) } | |
| end |