Compilare: main.cpp: In function 'void bfs(int, std::vector<int>&)': main.cpp:24:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 24 | for(int i=0; i<G[node].size(); i++) | ~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:64:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 64 | for(int i=0; i<ans.size(); i++) | ~^~~~~~~~~~~