Compilare: user.cpp: In function ‘int main()’: user.cpp:36:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<L[nod].size();i++){ ^ user.cpp:16:20: warning: unused variable ‘j’ [-Wunused-variable] register int i,j,x,y,c,val,nod,vec,cost; ^ user.cpp:16:28: warning: variable ‘val’ set but not used [-Wunused-but-set-variable] register int i,j,x,y,c,val,nod,vec,cost; ^ user.cpp:16:36: warning: unused variable ‘vec’ [-Wunused-variable] register int i,j,x,y,c,val,nod,vec,cost; ^ user.cpp:16:40: warning: unused variable ‘cost’ [-Wunused-variable] register int i,j,x,y,c,val,nod,vec,cost; ^