Compilare: main.cpp: In member function 'void graf::dijkstra(int, std::vector<std::pair<int, int> >*)': main.cpp:51:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 51 | for(int i = 0; i < G[nod_curent].size(); i++) | ~~^~~~~~~~~~~~~~~~~~~~~~