Compilare: main.cpp: In function 'void update(int, int)': main.cpp:20:9: warning: statement has no effect [-Wunused-value] 20 | for(x;x<=n;x+=(x&(-x))) | ^ main.cpp: In function 'int query(int)': main.cpp:28:9: warning: statement has no effect [-Wunused-value] 28 | for(x;x!=0;x-=(x&(-x))) | ^ main.cpp: In function 'int main()': main.cpp:42:13: warning: unused variable 'nr' [-Wunused-variable] 42 | int nr=n/l+(n%l!=0); | ^~