Compilare: main.cpp: In function 'bool bfs()': main.cpp:28:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 28 | for(int i=0;i<G[x].size();i++){ | ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:49:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 49 | for(int i=0;i<G[n].size();i++){ | ~^~~~~~~~~~~~