size_t maxDistUtil(bool** m, const size_t& v, const size_t& size) {
    bool* visited = new bool[size] {};
    visited[v] = true;

    size_t dist = 0;
    std::queue<size_t> stack;
    for (auto&& i : adjVertices(m, v, size))
        stack.push(i);

    while (!stack.empty()) {
        size_t& p = stack.front();
        stack.pop();


        for (auto&& i : adjVertices(m, p, size)) {
            if (!visited[i]) {
                visited[i] = true;
                stack.push(i);
                ++dist;
            }
        }
        visited[p] = true;
    }
    delete[]visited;
    return dist;
}