def ala(x):
  out = []
  while x != 0:
    out.append(x % 10)
    x /= 10
  b = sorted(out)
  if out == b:
    return False
  b.reverse()
  if out == b:
    return False
  return True


nis = 0
nnot = 100
n = 100


while nis != nnot * 99:
  n += 1
  if ala(n):
    nis += 1
  else:
    nnot += 1

print n