Compilare: user.cpp: In function ‘int main()’: user.cpp:258:56: warning: ‘k’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout << query(left + x - 1, left + y - 1, k) << '\n'; ^ user.cpp:244:32: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized] values[++right] = x; ^ user.cpp:258:46: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout << query(left + x - 1, left + y - 1, k) << '\n'; ^