Compilare: user.cpp: In function ‘void dijkstra()’: user.cpp:67:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[p].size();i++) ^ user.cpp: In function ‘int rez(int, int)’: user.cpp:88:11: warning: unused variable ‘xx’ [-Wunused-variable] int i,xx; ^ user.cpp: In function ‘int main()’: user.cpp:115:20: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized] a[i][(1<<x)+1]=cost[loc[1]][loc[i]]; ^