27 lines
1.5 KiB
Ruby
27 lines
1.5 KiB
Ruby
def consecutive_lists(num)
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list_of_sub_lists = []
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digit_list = num.to_s.split("")
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start_index = 0
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end_index = 4
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while end_index < digit_list.size
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list_of_sub_lists << digit_list[start_index..end_index].map(&:to_i)
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start_index += 1
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end_index += 1
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end
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list_of_sub_lists
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end
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def consecutive_products(num)
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product_list = []
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consecutive_lists(num).each do |list|
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product_list << list.inject(:*)
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end
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product_list
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end
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def largest_consecutive_product(num)
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consecutive_products(num).max
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end
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puts largest_consecutive_product(7316717653133062491922511967442657474235534919493496983520312774506326239578318016984801869478851843858615607891129494954595017379583319528532088055111254069874715852386305071569329096329522744304355766896648950445244523161731856403098711121722383113622298934233803081353362766142828064444866452387493035890729629049156044077239071381051585930796086670172427121883998797908792274921901699720888093776657273330010533678812202354218097512545405947522435258490771167055601360483958644670632441572215539753697817977846174064955149290862569321978468622482839722413756570560574902614079729686524145351004748216637048440319989000889524345065854122758866688116427171479924442928230863465674813919123162824586178664583591245665294765456828489128831426076900422421902267105562632111110937054421750694165896040807198403850962455444362981230987879927244284909188845801561660979191338754992005240636899125607176060588611646710940507754100225698315520005593572972571636269561882670428252483600823257530420752963450)
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