Compilare: user.cpp: In function ‘void Dijkstra(int)’: user.cpp:80:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k=0;k<v[i].size();k++) ^ user.cpp:67:13: warning: unused variable ‘n1’ [-Wunused-variable] int i,k,n1,ih,j; ^ user.cpp: In function ‘int main()’: user.cpp:115:31: warning: unused variable ‘v’ [-Wunused-variable] vector<pair<int,int> >v[50001]; ^