N = int(input())
if 1:
  
  s = N //36
 
  t = N%36
  if t == 0:
    print('8'+'9'*s)
    exit()
    
  count = 0
  for i in range(1,9):
    if count + 9-i < t:
      count += 9-i
    else:
      a = i
      b = t-count+i
      break
  print(str(a)+str(b)*(s+1))