Compilare: main.cpp: In function 'void dijkstra()': main.cpp:21:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 21 | for(int i=0;i<v.size();i++) | ~^~~~~~~~~ main.cpp:30:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 30 | for (int i = 0; i < l[nod].size(); i++) | ~~^~~~~~~~~~~~~~~