19 lines
513 B
Ruby
19 lines
513 B
Ruby
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def change(n, list_of_coins)
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changeHelper(n, list_of_coins, [])
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end
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def changeHelper(n, list_of_coins, result_list)
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if list_of_coins.empty?
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[result_list]
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elsif n == 0
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[result_list]
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else
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if n >= list_of_coins.first
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changeHelper(n - list_of_coins.first, list_of_coins, result_list << list_of_coins.first) +
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changeHelper(n, list_of_coins[1..list_of_coins.count-1], result_list)
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else
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changeHelper(n, list_of_coins[1..list_of_coins.count-1], result_list)
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end
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end
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end
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