题解 | #竞选社长#

#include <stdio.h>
#include <string.h>

int main() {
   int a=0;
   int b=0;
   char number;
   while(scanf("%c",&number)!=EOF){
    if(number=='A'){
        a++;
    }else if(number=='B'){
        b++;
    }
   }
   if(a>b){
    printf("A\n");
   }else if(a==b){
    printf("E\n");
   }else{
    printf("B\n");
   }
   return 0;
}