D. Ikam Bokam
time limit per test
1 second
memory limit per test
256 megabytes
input
standard input
output
standard output

Natsuho, an Indonesian girl, wants to have a vacation in Japan. When browsing plane ticket prices, she sees that the prices are in yen (Japanese currency), but she's only familiar with rupiahs (Indonesian currency). It's known that in this universe, $$$1$$$ yen is equal to $$$100$$$ rupiahs.

Let's say we have a price that's a positive integer in yen. Let's say it's $$$N$$$ digits long. How many digits will it have if the price is converted into rupiahs?

Input

The only line contains a single integer $$$N$$$ ($$$1 \leq N \leq 18$$$) — the number of digits in the price in yen.

Output

A single integer representing the number of digits in the price if it's converted into rupiahs.

Examples
Input
1
Output
3
Input
9
Output
11
Note

In the first example, any $$$1$$$-digit positive integer ($$$1$$$, $$$2$$$, $$$3$$$, $$$4$$$, $$$5$$$, $$$6$$$, $$$7$$$, $$$8$$$, or $$$9$$$) in yen, when converted into rupiahs, with turn into $$$100$$$, $$$200$$$, $$$300$$$, $$$400$$$, $$$500$$$, $$$600$$$, $$$700$$$, $$$800$$$, or $$$900$$$. Every single one of those has $$$3$$$ digits.