ABC-poisto

#include <algorithm>
#include <iostream>
#include <vector>
using namespace std;
 
int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int t;
    cin >> t;
    while (t--) {
        string s;
        cin >> s;
        int c[3]{};
        for (auto &u : s)
            c[u - 'A']++;
        int k = 0;
        while (!!c[0] + !!c[1] + !!c[2] > 1) {
            sort(begin(c), end(c));
            c[1]--;
            c[2]--;
            k += 2;
        }
        cout << k << '\n';
    }
}

Test 1

Group: 1, 2

Verdict: ACCEPTED

Test 2

Group: 2

Verdict: ACCEPTED