Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:19:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 19 | for (int i=0;i<l[nod].size();i++) { | ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:52:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 52 | for (int j=0;j<c[i].size();j++) | ~^~~~~~~~~~~~