Compilare: main.cpp: In function 'int main()': main.cpp:45:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 45 | for(int j=0;j<G[nod].size();j++) | ~^~~~~~~~~~~~~~