Compilare: main.cpp: In function 'void dijkstra(int)': main.cpp:42:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[nmin].size();i++) ~^~~~~~~~~~~~~~~ main.cpp:30:20: warning: unused variable 'j' [-Wunused-variable] int nmin, dn, i, j, nc, nj; ^ main.cpp:30:23: warning: unused variable 'nc' [-Wunused-variable] int nmin, dn, i, j, nc, nj; ^~ main.cpp:30:27: warning: unused variable 'nj' [-Wunused-variable] int nmin, dn, i, j, nc, nj; ^~