Compilare: user.cpp: In member function ‘void kd_tree::construct(const std::vector<std::pair<int, int> >&)’: user.cpp:91:46: warning: unused variable ‘_NN’ [-Wunused-variable] #define re(II, NN) for (int II(0), _NN(NN); (II) < (NN); ++(II)) ^ user.cpp:224:5: note: in expansion of macro ‘re’ re (i, n) ^ user.cpp: In function ‘void gen()’: user.cpp:91:46: warning: unused variable ‘_NN’ [-Wunused-variable] #define re(II, NN) for (int II(0), _NN(NN); (II) < (NN); ++(II)) ^ user.cpp:272:3: note: in expansion of macro ‘re’ re (i, N) ^ user.cpp: In function ‘int main()’: user.cpp:91:65: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define re(II, NN) for (int II(0), _NN(NN); (II) < (NN); ++(II)) ^ user.cpp:296:3: note: in expansion of macro ‘re’ re (i, res.size()) ^ user.cpp:91:46: warning: unused variable ‘_NN’ [-Wunused-variable] #define re(II, NN) for (int II(0), _NN(NN); (II) < (NN); ++(II)) ^ user.cpp:296:3: note: in expansion of macro ‘re’ re (i, res.size()) ^