题解 | #竞选社长#

#include <iostream>
#include <cstring>

using namespace std;

int main()
{
    string str;
    int arr[2] = { 0 };
    int max = 0;
    cin >> str;
    const char* p = str.c_str();
    while (*p != '0')
    {
        switch (*p)
        {
        case 'A':
            arr[0]++;
            break;
        case 'B':
            arr[1]++;
            break;
        }
        p++;
    }
    if (arr[0] >arr[1])
    {
        cout << 'A' << endl;
    }
    else if (arr[1] > arr[0])
    {
        cout << 'B' << endl;
    }
    else if (arr[1] == arr[0])
    {
        cout << 'E' << endl;
    }
    return 0;
}