dic = {'I':1, 'V':5, 'X':10, 'L':50, 'C':100, 'D':500, 'M':1000}
rdic = {1:'I', 2:'II', 3:'III', 4:'IV', 5:'V', 6:'VI', 7:'VII', 8:'VIII', 9:'IX',
        10:'X', 20:'XX', 30:'XXX', 40:'XL', 50:'L', 60:'LX', 70:'LXX', 80:'LXXX',
        90:'XC', 100:'C', 200:'CC', 300:'CCC', 400:'CD', 500:'D', 600:'DC',
        700:'DCC', 800:'DCCC', 900:'CM', 1000:'M'}

def rtoi(ss):
  out = dic.get(ss[-1])
  for i in xrange(len(ss) - 1):
    if dic.get(ss[i]) < dic.get(ss[i + 1]):
      out -= dic.get(ss[i])
    else:
      out += dic.get(ss[i])
  return out

def itor(num):
  out = ''
  thousand = num - num % 1000
  if num > 0:
    out += rdic.get(1000) * (thousand / 1000)
    num %= 1000
  hundred = num - num % 100
  if hundred > 0:
    out += rdic.get(hundred)
    num %= 100
  teen = num - num % 10
  if teen > 0:
    out += rdic.get(teen)
    num %= 10
  if num > 0:
    out += rdic.get(num)
  return out

ff = open('../roman.txt', 'r')
lis = ff.readlines()
ff.close()

count = 0
for i in lis:
  new = itor(rtoi(i.rstrip()))
  count += abs(len(new) - len(i.rstrip()))
print count