Compilare: main.cpp:8:5: warning: built-in function 'log2' declared as non-function [-Wbuiltin-declaration-mismatch] 8 | int log2[200001], p[100001], aint[800001], pa[100001], ua[100001], sol; | ^~~~ main.cpp: In function 'void DFS2(int)': main.cpp:89:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 89 | for(int l=0;l<y[nod].size();l++) | ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:148:14: warning: 'j' may be used uninitialized [-Wmaybe-uninitialized] 148 | for(int j=(1<<j);j<=k;j++) | ^ main.cpp:148:14: note: 'j' was declared here 148 | for(int j=(1<<j);j<=k;j++) | ^