Compilare: user.cpp: In function ‘std::array<long long unsigned int, 2u> query(nod*, int, int)’: user.cpp:119:15: warning: unused variable ‘sz_st’ [-Wunused-variable] const int sz_st = mij-ql, sz_dr = qr-mij; ^ user.cpp: In function ‘int main()’: user.cpp:178:24: warning: variable ‘tmp’ set but not used [-Wunused-but-set-variable] const auto tmp = query(rad, poz-sz[ind]+1, poz); ^