#434. Savings 8%
You put m tugriks in a bank. Every year the money grows: `m = m + m * 8 // 100`. After how many years will the money be at least 2 times the starting amount?
### Input
One integer m (100 ≤ m ≤ 10⁶).
### Output
The number of years.
Examples
Input
817628
Output
10
Input
284134
Output
10
💡 You can solve it with Python, JavaScript or blocks. Read the input line by line with input(). Don't print a question (like input("Number: ")). Print exactly what the output asks for, nothing more.