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())
m = 100

import math
count = 0
while True:
    if m >= x:
        print(count)
        break
    x = math.floor(100 * 1.01)
    count += 1
    
x = int(input())
m = 100

count = 0
while m < x:
    m += m // 100
    count += 1

print(count)
