Compilare: main.cpp: In function 'int dijkstra(int)': main.cpp:29:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 29 | for(int i=0; i<adj_list[nod].size(); i++) | ~^~~~~~~~~~~~~~~~~~~~~ main.cpp:45:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 45 | for(int i=0; i<adj_list[elem.second].size(); i++) | ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:61:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 61 | for(int j=0; j<adj_list[i].size(); j++) | ~^~~~~~~~~~~~~~~~~~~