Compilare: user.cpp: In function ‘int main()’: user.cpp:39:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<L[nod].size();i++) { ^ user.cpp:17:20: warning: unused variable ‘j’ [-Wunused-variable] register int i,j,x,y,c,val,valvecin,nod,nodvecin; ^ user.cpp:17:28: warning: variable ‘val’ set but not used [-Wunused-but-set-variable] register int i,j,x,y,c,val,valvecin,nod,nodvecin; ^