Compilare: user.cpp: In function ‘int main()’: user.cpp:35:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[x].size();i++) ^ user.cpp:16:17: warning: variable ‘index1’ set but not used [-Wunused-but-set-variable] int n,m,x,y,index1,index2,cost,v[250001]; ^ user.cpp:16:24: warning: variable ‘index2’ set but not used [-Wunused-but-set-variable] int n,m,x,y,index1,index2,cost,v[250001]; ^ user.cpp:16:36: warning: unused variable ‘v’ [-Wunused-variable] int n,m,x,y,index1,index2,cost,v[250001]; ^