Compilare: main.cpp: In function 'void dfs(int)': main.cpp:23:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 23 | for (int i=0; i<v[start].size(); i++) { | ~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:56:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 56 | for (int i=0; i<e.size(); i++) { | ~^~~~~~~~~