Median race


Statement 
You are given S contains only '1' - '5'.
Output the median.

Constraints
* 1 ≤ |S| ≤ 15
* |S| is odd.
Sample Input
Sample Output
Contest ID
0005
Writer
admin
Publish date
2020/05/24 22:30:00
Solved
160
Top player
Yupiteru