Compilare: user.cpp: In function ‘void updateAib(int, int, int)’: user.cpp:62:59: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = pos; i < aint[aintNode].usersFormRange.size(); i += lsb(i)) ^ user.cpp: In function ‘int main()’: user.cpp:240:11: warning: ‘solution’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout << solution << "\n"; ^