Compilare: user.cpp: In function ‘int bf(std::vector<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:162:5: note: in expansion of macro ‘re’ re (i, N) ^ 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:165:5: note: in expansion of macro ‘re’ re (i, nr_car) { ^ 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:194:5: note: in expansion of macro ‘re’ re (i, nr_car) { ^ 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:262:3: note: in expansion of macro ‘re’ re (i, nr_steps - 1) { ^ 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:280:3: note: in expansion of macro ‘re’ re (i, size(res)) ^ user.cpp: In function ‘int main()’: 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:299:5: note: in expansion of macro ‘re’ re (j, N) ^ 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:297:3: note: in expansion of macro ‘re’ re (i, N) { ^ user.cpp:314:14: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (u[x]) ^ user.cpp:318:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] orientation[x] = 0; // horizontal ^