text: import math
  import time
  
  t1 = time.time()
  
  fn1 = 1
  fn2 = 1
  fn3 = 2
  count = 3
  dig = 1
  
  while dig < 1000:
      fn1 = fn2
      fn2 = fn3
      fn3 = fn2+fn1
      count += 1
      dig = math.floor(math.log10(fn3))+1
  
  print (count)
  
  print("time:",time.time()-t1)
  