101111: [AtCoder]ABC111 B - AtCoder Beginner Contest 111

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 $n$.

Sample Input 1

111

Sample Output 1

111

The next ABC to be held is ABC $111$, where Kurohashi can make his debut.

Sample Input 2

112

Sample Output 2

222

The next ABC to be held is ABC $112$, which means Kurohashi can no longer participate in ABC $111$. Among the ABCs where Kurohashi can make his debut, the earliest one is ABC $222$.

Sample Input 3

750

Sample Output 3

777