13 lines
413 B
Ruby
13 lines
413 B
Ruby
def find_product_of(n)
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puts File
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.readlines("input.txt") # read input lines as array entries
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.map(&:to_i) # convert each array entry to integer
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.permutation(n) # create Enumerable with all permutations of n entries
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.find { |array| array.sum == 2020} # find a permutation that sums to 2020
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.inject(:*) # get the product of that array
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end
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puts "Part 1: "
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find_product_of(2)
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puts "Part 2: "
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find_product_of(3) |