Compilare: user.cpp: In function ‘int main()’: user.cpp:130:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < node[cur_node].size(); i ++) { ^ user.cpp: In instantiation of ‘Type Heap<Type>::push(Type) [with Type = std::pair<int, int>]’: user.cpp:115:21: required from here user.cpp:34:3: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In instantiation of ‘Type Heap<Type>::pop() [with Type = std::pair<int, int>]’: user.cpp:124:14: required from here user.cpp:38:3: warning: no return statement in function returning non-void [-Wreturn-type] } ^