Compilare: user.cpp: In function ‘int main()’: user.cpp:27:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<graf[1].size(); ++i) { dist[graf[1][i].vf]=graf[1][i].c; auxh.c=graf[1][i].c; auxh.vf=graf[1][i].vf; heap.push_back(auxh); } ^ user.cpp:35:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<graf[vf].size(); ++i) if (!sel[graf[vf][i].vf]) { ^ user.cpp:22:12: warning: unused variable ‘e’ [-Wunused-variable] int i, e, a, b, c, vf, ax; ^