Compilare: main.cpp: In member function 'void Nod::remove(int)': main.cpp:230:63: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (index > 0 && children[index - 1]->keys.size() >= degree) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~ main.cpp:234:68: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (index != n && children[index + 1]->keys.size() >= degree) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~