Compilare: main.cpp: In function 'void dijkstra()': main.cpp:19:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[nod].size();i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:45:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[a].size();i++) ~^~~~~~~~~~~~ main.cpp:61:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[b].size();i++) ~^~~~~~~~~~~~ main.cpp:77:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[c].size();i++) ~^~~~~~~~~~~~