LeetCode Roman to Integerを解いた

問題

https://leetcode.com/problems/roman-to-integer/

解いた

# @param {String} s
# @return {Integer}
def roman_to_int(s)
    convert_hash = {
        "I" => 1,
        "V" => 5,
        "X" => 10,
        "L" => 50,
        "C" => 100,
        "D" => 500,
        "M" => 1000
    }
    result = 0
    
    chars = s.chars
    chars.each_with_index do |char, index|
      next_index = convert_hash.to_a.find_index { |k| k[0] == chars[index + 1] }
      current_index = convert_hash.to_a.find_index { |k| k[0] == char}
    
      if next_index.nil? || next_index <= current_index
          result += convert_hash[char]
      else
          result -= convert_hash[char] 
      end
    end
    p result
end

結果