Compilare: main.cpp: In function 'void dfs(int, int, int)': main.cpp:23:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 23 | for (i=0; i<LA[vf].size(); i++) | ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:102:14: warning: iteration 200008 invokes undefined behavior [-Waggressive-loop-optimizations] 102 | lg[i]=lg[i/2]+1; | ~~~~~^~~~~~~~~~ main.cpp:101:16: note: within this loop 101 | for (i=2; i<=2*NMAX; i++) | ^