题目描述
Snuke lives at position x on a number line.
On this line, there are two stores A and B, respectively at position a and b, that offer food for delivery.
Snuke decided to get food delivery from the closer of stores A and B.
Find out which store is closer to Snuke's residence.
Here, the distance between two points s and t on a number line is represented by |s-t|.
-----Constraints-----
- $1 \leq x \leq 1000$
- $1 \leq a \leq 1000$
- $1 \leq b \leq 1000$
- x, a and b are pairwise distinct.
- The distances between Snuke's residence and stores A and B are different.
-----Input-----
Input is given from Standard Input in the following format:
x a b
-----Output-----
If store A is closer, print A; if store B is closer, print B.
-----Sample Input-----
5 2 7
-----Sample Output-----
B
The distances between Snuke's residence and stores A and B are 3 and 2, respectively.
Since store B is closer, print B.
输入格式
见题面
输出格式
见题面