Problem Statement

Kurohashi has never participated in AtCoder Beginner Contest (ABC).

The next ABC to be held is ABC $N$ (the $N$-th ABC ever held). Kurohashi wants to make his debut in some ABC $x$ such that all the digits of $x$ in base ten are the same.

What is the earliest ABC where Kurohashi can make his debut?

Constraints

• $100 \leq N \leq 999$
• $N$ is an integer.

Input

Input is given from Standard Input in the following format:

N

Output

If the earliest ABC where Kurohashi can make his debut is ABC $n$, print $n$.