std::pair<std::vector<int>, std::vector<std::pair<int, int>>>
ReadGoldAndTrusts(std::istream &in_stream) {
    int people_amount, trusts_amount;
    std::vector<int> golds;
    std::vector<std::pair<int, int>> trusts;
    in_stream >> people_amount >> trusts_amount;
    golds.resize(people_amount);
    for (auto &person : golds) {
        in_stream >> person;
    }
    trusts.resize(trusts_amount);
    for (auto &[from, to] : trusts) {
        in_stream >> from >> to;
    }
    return {golds, trusts};
}