Compilare: user.cpp: In function ‘bool este_conex(const int&)’: user.cpp:25:32: warning: argument to ‘sizeof’ in ‘void* memset(void*, int, size_t)’ call is the same expression as the destination; did you mean to dereference it? [-Wsizeof-pointer-memaccess] memset(select , false , sizeof(select)); ^ user.cpp:31:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0;i<graph[nod].size();i++) ^ user.cpp: In function ‘int delete_edge(const int&, const int&)’: user.cpp:69:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^