Compilare: main.cpp: In function 'void DFS(int, int)': main.cpp:45:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 45 | for (int i = 0; i < G[nod].size(); i++) | ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:93:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 93 | for (int j = 0; j < s.size(); j++) | ~~^~~~~~~~~~