def statystyka_slow(n)
    hash = Hash.new
    File.open(n, "r").each_line { |line|
    words = line.downcase.gsub(/[^[:word:]\s]/, '').split
    words.each { |word|
        if hash.has_key?(word)
            hash[word] = hash[word] + 1
        else
            hash[word] = 1
        end
        }
    }

    sum = hash.values.inject(:+)

    hash.each{ |key,value| hash[key] = (value.to_f*100/sum).to_f.round(4)}
    hash.each { |elem|
      puts "\"#{elem[0]}\" = #{elem[1]}%"
    }

end

statystyka_slow(gets.chop)