Compilare: main.cpp: In function 'void dijkstra()': main.cpp:28:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int>, std::allocator<std::pair<int, int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 28 | for(int i=0; i<v[a.second].size(); i++) | ~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:71:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 71 | for(int k=0; k<vn[j].size(); k++) | ~^~~~~~~~~~~~~