euler-017

# Map numbers to their word representations
NUMBER_WORDS = {
  90 => "ninety", 80 => "eighty", 70 => "seventy", 60 => "sixty", 
  50 => "fifty", 40 => "forty", 30 => "thirty", 20 => "twenty",
  19 => "nineteen", 18 => "eighteen", 17 => "seventeen", 16 => "sixteen",
  15 => "fifteen", 14 => "fourteen", 13 => "thirteen", 12 => "twelve",
  11 => "eleven", 10 => "ten", 9 => "nine", 8 => "eight", 7 => "seven",
  6 => "six", 5 => "five", 4 => "four", 3 => "three", 2 => "two", 1 => "one"
}.freeze

def humanize(number)
  parts = []
  
  # Handle thousands
  if number >= 1000
    parts << "#{NUMBER_WORDS[number / 1000]}thousand"
    number %= 1000
  end
  
  # Handle hundreds
  if number >= 100
    parts << "#{NUMBER_WORDS[number / 100]}hundred"
    number %= 100
    parts << "and" if number > 0
  end
  
  # Handle tens and ones
  if number > 0
    if NUMBER_WORDS.key?(number)
      parts << NUMBER_WORDS[number]
    else
      tens = (number / 10) * 10
      ones = number % 10
      parts << NUMBER_WORDS[tens]
      parts << NUMBER_WORDS[ones] if ones > 0
    end
  end
  
  parts.join('')
end

# Calculate total character count for numbers 1 to 1000
character_count = (1..1000).sum { |n| humanize(n).length }
puts "The character count is #{character_count}"