Compilare: user.cpp: In function ‘int main()’: user.cpp:32:66: warning: ‘last_index’ may be used uninitialized in this function [-Wmaybe-uninitialized] out << sum_sol << " " << first_index + 1 << " " << last_index + 1 << '\n'; ^ user.cpp:32:41: warning: ‘first_index’ may be used uninitialized in this function [-Wmaybe-uninitialized] out << sum_sol << " " << first_index + 1 << " " << last_index + 1 << '\n'; ^