1926A - Vlad and the Best of Five - CodeForces Solution

#include <bits/stdc++.h>

using namespace std;

int main() {
    int t;cin>>t;
    while (t--){
        string s;cin>>s;
        int ans1=0;
        int ans2=0;
        for (int k=0;k<s.size();k++){
            if (s[k]=='B') ans1++;
            else ans2++;
        }
        if (ans1>ans2) cout<<'B'<<endl;
        else cout<<'A'<<endl;
    }


    return 0;
}