#include <bits/stdc++.h>
using namespace std;
int main(){int a;cin>>a;int b=a/100;if(111*b>=a){cout <<111*b;}
    else{cout <<111*(b+1);}}

### Prompt

Your challenge is to write a Cpp solution to the following problem:

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.

Examples

Input

111


Output

111


Input

112


Output

222


Input

750


Output

777

### Response

```cpp
#include <bits/stdc++.h>
using namespace std;
int main(){int a;cin>>a;int b=a/100;if(111*b>=a){cout <<111*b;}
    else{cout <<111*(b+1);}}

```