Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:20:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 20 | for(int l=0;l<G[k].size();l++) | ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:78:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 78 | for(i=0;i<ans.size();i++) | ~^~~~~~~~~~~