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  1. def factorial(num) num==0 ? 1 : num * factorial(num-1) end
  2. total = 0
  3. (0..6).each { |i| total+=((-1)**i)*(factorial(15)/(factorial(i)*factorial(15-i)))*(factorial((83-(10*i)))/(factorial(14)*factorial((83-(10*i)-14)))) }
  4. puts total
Success #stdin #stdout 0s 29112KB
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35186410984875
https://ideone.com/og6cSz
language:
Ruby (ruby 2.5.5)
created:
8 years ago
visibility:
public

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