Compilare: user.cpp: In function ‘void dijkstra()’: user.cpp:59:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0; j<G[vfmin].size(); j++) ^ user.cpp:47:6: warning: unused variable ‘i’ [-Wunused-variable] {int i, nrs=0, j, vfmin; ^ user.cpp: In function ‘void afisare()’: user.cpp:81:5: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (i!=x0) ^