Compilare: user.cpp: In function ‘int update(int)’: user.cpp:22:8: warning: statement has no effect [-Wunused-value] {for (x;x<=n;x+=lsb(x)) aib[x]++;} ^ user.cpp:22:34: warning: no return statement in function returning non-void [-Wreturn-type] {for (x;x<=n;x+=lsb(x)) aib[x]++;} ^ user.cpp: In function ‘int query(int)’: user.cpp:26:7: warning: statement has no effect [-Wunused-value] for (x;x>=1;x-=lsb(x)) sum+=aib[x]; ^