题解 | 竞选社长

#include <bits/stdc++.h>
using namespace std;
int main() {
    int a = 0, b = 0;
    string s;
    getline(cin,s);
    int n = s.size();
    for(int i = 0; i < n - 1; i ++){
        if(s[i] == 'A') a ++;
        if(s[i] == 'B') b ++;
    }
    if(a > b) cout << "A";
    if(a < b) cout << "B";
    if(a == b) cout << "E";
    return 0;
}