Järjestys

#include <iostream>
#include <algorithm>
 
using namespace std;
 
int main()
{
    int n;
    cin >> n;
 
    for (int i = 0; i < n; i++)
    {
        string x;
        cin >> x;
 
        int At = 0;
        for (char c : x)
            if (c == 'A')
                At++;
 
        int tulos = 0;
 
        for (int j = 0; j < At; j++)
            if (x.at(j) == 'B')
                tulos++;
 
        cout << tulos << "\n";
    }
}

Test 1

Verdict: ACCEPTED