n = 2
maxx = 100
path1 = range(1,10)
path_1 = range(1,11)
total = sum(path1) + sum(path_1) - 1

while n < maxx:
  new1 = []
  new_1 = []
  tmp1 = 0
  tmp_1 = 0
  for i in xrange(9):
    tmp1 += path1[i]
    new1.append(tmp1)
  path1 = new1
  for i in xrange(10):
    tmp_1 += path_1[i]
    new_1.append(tmp_1)
  path_1 = new_1
#  print path1, path_1
  total += sum(path1) + sum(path_1) - 9 - 1
  n += 1

print total