Compilare: main.cpp: In function 'int main()': main.cpp:33:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 33 | for(int b=0;b<ubu.size();b++) | ~^~~~~~~~~~~ main.cpp: In function 'void dijkstra(int)': main.cpp:81:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 81 | for(int i=0;i<v[x].size();i++) | ~^~~~~~~~~~~~