Compilare: user.cpp: In function ‘int main()’: user.cpp:176:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] arr_dump(A.Final, A.Final.size()); ^ user.cpp:13:16: note: in definition of macro ‘arr_dump’ for(int _=0;_<n;++_) cerr<<x[_]<<" ";cerr<<'\n';} ^ user.cpp:135:13: warning: unused variable ‘m’ [-Wunused-variable] int a, b, m; ^