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-----
111

-----Sample Output-----
111

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

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