题解 | 竞选社长

#include <stdio.h>

int main() {
    char ch;
    int countA = 0, countB = 0;

    // 逐个读取字符，遇到 '0' 结束
    while (scanf("%c", &ch) == 1 && ch != '0') {
        if (ch == 'A') {
            countA++;
        } else if (ch == 'B') {
            countB++;
        }
    }

    // 比较得票数并输出结果
    if (countA > countB) {
        printf("A");
    } else if (countB > countA) {
        printf("B");
    } else {
        printf("E");
    }

    return 0;
}