Compilare: main.cpp: In member function 'void Node::splitChild(int, Node*)': main.cpp:87:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 87 | for (int index = 0; index < child->keys.size() - newNrKeys - 1; ++index) | ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:92:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 92 | for(int index = 0; index < child->keys.size() - newNrKeys - 2; ++index) | ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~