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February 17, 2018 03:20
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Calculate robots sample
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| def calculate(n) | |
| [1, 2, 3].repeated_combination(n).to_a.each_with_object({}) { |a, cache| | |
| Array.new(n) do |i| | |
| combination = a[0..i] | |
| if combination.sum == n && !cache.key?(combination) | |
| cache[combination] = true | |
| end | |
| end | |
| }.keys | |
| end |
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