Compilare: main.cpp: In function 'int query(int, int)': main.cpp:25:9: warning: variable 'lung' set but not used [-Wunused-but-set-variable] 25 | int lung,k; | ^~~~ main.cpp: In function 'int main()': main.cpp:38:14: warning: iteration 498 invokes undefined behavior [-Waggressive-loop-optimizations] 38 | lg[i]=lg[i/2]+1; | ~~~~~^~~~~~~~~~ main.cpp:37:16: note: within this loop 37 | for (i=2; i<=N; i++) | ^