题解 | 竞选社长

#include <stdio.h>

int main() {
    char poll;
    int countA =0,countB=0;
    while ((poll = getchar()) != '0') {
        if(poll == 'A') countA++;
        else if(poll == 'B') countB++;
    }
    if(countA > countB) printf("A");
    else if(countA < countB) printf("B");
    else printf("E");
    
    return 0;
}