Problem:
Score : 100 points

Problem Statement

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 1

5 2 7

Sample Output 1

B

The distances between Snuke's residence and stores A and B are 3 and 2, respectively.
Since store B is closer, print B.

Sample Input 2

1 999 1000

Sample Output 2

A

Solution in C (GCC 5.4.1) (judge verdict: Wrong Answer)

#include<stdio.h>


int main()
{
	int t1,t2,t3,t4,x,a,b,c,d;
scanf("%d, %d, %d ",&x,&a,&b);
t1 = a>x?a:x;
t2 = a<x?a:x;
c = t1 - t2;
t3 =  b>x?b:x;
t4 =  b<x?b:x;
d = t3-t4;
if (c>d)
{
printf("B\n");
}else 
printf("A\n"); 
	return 0;
}