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())
a = 100
count =0
while (1):
    if a>x:
        print(count)
        break
    a = int(a * 1.01)
    count += 1

x = int(input())
a = 100
count =0
while (1):
    if a>=x:
        print(count)
        break
    a += a//100
    count += 1
