Compilare: main.cpp:17:5: warning: built-in function 'log2' declared as non-function [-Wbuiltin-declaration-mismatch] 17 | int log2[NMAX]; | ^~~~ main.cpp: In function 'void dfs(int, int)': main.cpp:29:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 29 | for (i = 0; i < children[node].size(); ++i) | ~~^~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:54:18: warning: unused variable 'j' [-Wunused-variable] 54 | int n, q, i, j, a, b, p; | ^ main.cpp: In function 'void buildLog()': main.cpp:41:17: warning: iteration 100003 invokes undefined behavior [-Waggressive-loop-optimizations] 41 | log2[i] = log2[i / 2] + 1; | ~~~~~~~~^~~~~~~~~~~~~~~~~ main.cpp:40:19: note: within this loop 40 | for (i = 2; i <= NMAX; ++i) | ^