def rev(x):
  out = ''
  for i in xrange(len(x)):
    out += x[-1 - i]
  return out



def make(x):
  if x == 1:
    return [1,2,3,4,5,6,7,8,9]
  lenn = 10 ** (x / 2)
  out = []
  for i in xrange(lenn / 10, lenn):
    a = str(i)
    b = rev(a)
    if x % 2:
      for i in xrange(10):
        out.append(int(a + str(i) + b))
    else:
      out.append(int(a + b))
  return out



def test(x):
  bi = []
  while x > 0:
    bi.append(x % 2)
    x /= 2
  bb = bi[:]
  bb.reverse()
  if bi == bb:
    #print bi,
    return True
  else:
    return False

total = 0
for i in xrange(1, 7):
  for j in make(i):
    if test(j):
      #print j
      total += j
print total