Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:13:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 13 | for(int i=0;i<L[nod].size();i++){ | ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:36:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 36 | for(int j=0;j<N[i].size();j++){ | ~^~~~~~~~~~~~