output_description: Print the number of years it takes for Takahashi's balance to reach X yen or
  above for the first time.
  
  * * *
input_description: Input is given from Standard Input in the following format:
  
      
      
      X
attempt: t_have = 100
  t_need_achieve = int(input())
  count_year = 0
  while t_have < t_need_achieve:
      t_have += t_have // 100
      count_year += 1
  print(count_year)
  
problem_description: Statement
  
  Takahashi has a deposit of 100 yen (the currency of Japan) in AtCoder Bank.
  
  The bank pays an annual interest rate of 1 % compounded annually. (A fraction
  of less than one yen is discarded.)
  
  Assuming that nothing other than the interest affects Takahashi's balance, in
  how many years does the balance reach X yen or above for the first time?
samples: [{"input": "103", "output": "3\n    \n\n  * The balance after one year is 101 yen.\n  * The balance after two years is 102 yen.\n  * The balance after three years is 103 yen.\n\nThus, it takes three years for the balance to reach 103 yen or above.\n\n* * *"}, {"input": "1000000000000000000", "output": "3760\n    \n\n* * *"}, {"input": "1333333333", "output": "1706"}]