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?
X = int(input())

money = 100
year = 0

while money <= X:
	money += int(money*0.01)
	year += 1

else:
	print(year)
X = int(input())

money = 100
year = 0

while money < X:
	money += int(money*0.01)
	year += 1

else:
	print(year)
