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  1. queries = []
  2. while (line = gets)
  3.   n = line.to_i
  4.   break if n == 0
  5.   queries << n
  6. end
  7.  
  8. exit if queries.empty?
  9.  
  10. max_n = queries.max
  11. sum_of_digits = Array.new(max_n + 1)
  12. fact = 1
  13.  
  14. (1..max_n).each do |i|
  15.   fact *= i
  16.   sum_of_digits[i] = fact.to_s.each_char.map(&:to_i).sum
  17. end
  18.  
  19. queries.each do |n|
  20.   puts sum_of_digits[n]
  21. end
  22.  
Success #stdin #stdout 0.01s 8108KB
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https://ideone.com/9Jm5gT
language:
Ruby (ruby 2.5.5)
created:
2 days ago
visibility:
public

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