Compilare: user.cpp: In function ‘int Search(int)’: user.cpp:15:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<H[R].size();i++) ~^~~~~~~~~~~~ user.cpp: In function ‘int Delete(int)’: user.cpp:26:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int Add(int)’: user.cpp:33:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^