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