Compilare: user.cpp: In member function ‘int ConvexDP::query(int)’: user.cpp:115:3: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In member function ‘int ConvexDP::insert(int, int)’: user.cpp:119:3: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In member function ‘int ConvexDP::get_h(int, int)’: user.cpp:124:3: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In member function ‘int ConvexDP::C(int, int)’: user.cpp:129:3: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int64 calc(int, int, int, int)’: user.cpp:157:21: warning: unused variable ‘l_val’ [-Wunused-variable] int64 cur_val(0), l_val(0), r_val(0), best_pos = -1; ^ user.cpp:157:31: warning: unused variable ‘r_val’ [-Wunused-variable] int64 cur_val(0), l_val(0), r_val(0), best_pos = -1; ^