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 9.2.1) (judge verdict: Wrong Answer)

#include <stdio.h>

int distance (int num1, int num2);
  
int main(void){
  int x, a, b;
  scanf( "%d %d %d", &x, &a, &b);
  int d1 = distance (x,a);
  int d2 = distance (x,b);
  if (d1>=d2){
    printf("A");
  }else {
    printf("B");
  }
return 0;
}

  int distance (int num1, int num2){
    int dis;
    if (num1 > num2){
      dis = num1 - num2;
    } else {
      dis = num2 - num1;
    }
    return dis;
  }