Specify data type on list creation for performance
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@ -37,7 +37,7 @@ function Problem12()
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function num_divisors(n)
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function num_divisors(n)
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res = floor(Int, sqrt(n))
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res = floor(Int, sqrt(n))
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divs = []
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divs = Int[]
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for i = 1:res
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for i = 1:res
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if n % i == 0
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if n % i == 0
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append!(divs, i)
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append!(divs, i)
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