7-9 find a small ball with a balance

7-9 Find the ball with a balance (10 branch )

Three balls A、B、C, The size and shape are the same, and one of the balls has a different weight from the other balls . Ask to find this different ball .

Input format ：

Enter... On one line 3 A positive integer , The order corresponds to the ball A、B、C Weight of .

Output format ：

Output the only different ball in one line .

sample input ：

1 1 2

sample output ：

C

#include<stdio.h>
int main(){
    int A,B,C;
    scanf("%d %d %d",&A,&B,&C);
    if(A==B){
        printf("C");
    }else if(A==C){
        printf("B");
    }else{
        printf("A");
    }
    return 0;
}