Kulut

#include <bits/stdc++.h>

using namespace std;

using ll = long long;

int main() {
    int n;
    cin >> n;

    map<char, int> mp;
    ll s = 0;

    for (int i = 0; i < n; ++i) {
        char c;
        int x;
        cin >> c >> x;
        mp[c] += x;
        s+= x;
    }


    vector<pair<pair<char, char>, int>> ans;

    for (char c : {'B', 'C', 'D'}) {
        if (mp[c] < s / 4) {
            ans.push_back({{c, 'A'}, s / 4 - mp[c]});
        } else if (mp[c] > s / 4) {
            ans.push_back({{'A', c}, mp[c] - s / 4});
        }
    }

    cout << ans.size() << endl;

    for (auto x : ans) {
        cout << x.first.first << " " << x.first.second << " " << x.second << endl;
    }

    return 0;
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED

Test 11

Verdict: ACCEPTED