Compilare: main.cpp: In function 'void dfs(int)': main.cpp:15:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 15 | for(int i=0; i<G[x].size(); i++) | ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:42:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 42 | for(int i=0; i<V.size(); i++) | ~^~~~~~~~~