Compilare: user.cpp: In function ‘void update(int, int)’: user.cpp:15:11: warning: statement has no effect [-Wunused-value] for (x;x<=n;x=x+lsb(x)) ^ user.cpp: In function ‘int query(int)’: user.cpp:22:11: warning: statement has no effect [-Wunused-value] for (x;x>=1;x=x-lsb(x)) ^ user.cpp: In function ‘int main()’: user.cpp:32:11: warning: statement has no effect [-Wunused-value] for (t;t>=1;t--) ^