题解 | 竞选社长

#include <stdio.h>

int main() {
    char arr[20] = {0};
    scanf("%s",arr);
    int i = 0;
    int count1 = 0;
    int count2 = 0;
    int flag = 1;
    while(flag)
    {
        if(arr[i] == '0')
        {
            flag = 0;
            break;
        }
        if(arr[i] == 'A')
        {
            count1++;
        }
        else if (arr[i] == 'B') {
            count2++;
        }
        i++;
    }
    if(count1 > count2)
    {
        printf("A");

    }
    else if(count2 > count1) {
    printf("B");
    }
    else {
    printf("E");
    }

    return 0;
}