Compilare: main.cpp:17:5: warning: built-in function 'log2' declared as non-function [-Wbuiltin-declaration-mismatch] 17 | int log2[2 * 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:61:18: warning: unused variable 'j' [-Wunused-variable] 61 | int n, q, i, j, a, b, p; | ^