Compilare: main.cpp: In function 'int query(int, int)': main.cpp:26:9: warning: variable 'lung' set but not used [-Wunused-but-set-variable] 26 | int lung,k; | ^~~~ main.cpp: In function 'int main()': main.cpp:39:14: warning: iteration 999998 invokes undefined behavior [-Waggressive-loop-optimizations] 39 | lg[i]=lg[i/2]+1; | ~~~~~^~~~~~~~~~ main.cpp:38:16: note: within this loop 38 | for (i=2; i<=N; i++) | ^