Compilare: main.cpp: In function 'int main()': main.cpp:44:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 44 | for(int i=0;i<lista[nod].size();i++) | ~^~~~~~~~~~~~~~~~~~