Score : $200$ points
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?
Input is given from Standard Input in the following format:
$N$
If the earliest ABC where Kurohashi can make his debut is ABC $n$, print $n$.
111
111
The next ABC to be held is ABC $111$, where Kurohashi can make his debut.
112
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 $222$.
750
777