Compilare: user.cpp: In function ‘int main()’: user.cpp:53:74: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (current.i + directions_i[i] < 0 || current.i + directions_i[i] >= n || current.j + directions_j[i] < 0 || current.j + directions_j[i] >= n); ^ user.cpp:53:145: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (current.i + directions_i[i] < 0 || current.i + directions_i[i] >= n || current.j + directions_j[i] < 0 || current.j + directions_j[i] >= n); ^