def poly(x, coef):
  out = 0
  for i in coef:
    out = out * x + i
  return out


un = (1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1)

a = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
for i in xrange(len(a)):
  a[i] = poly(a[i], un)

total = 0
for length in xrange(2, len(a) + 1):
  y = a[:length]
  n = len(y)
  L = 0
  for k in xrange(n):
    l = 1
    for xi in xrange(n):
      if xi != k:
        l *= (n - xi)
    for xi in xrange(n):
      if xi != k:
        l /= (k - xi)
    L += (l * y[k])
  total += L

print total + 1