Compilare: user.cpp: In function ‘int main()’: user.cpp:55:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[nod].size();++i) ^ user.cpp:32:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,m,l,x,y,z,x1,y1,nod; ^ user.cpp:32:23: warning: unused variable ‘x1’ [-Wunused-variable] int i,j,m,l,x,y,z,x1,y1,nod; ^ user.cpp:32:26: warning: unused variable ‘y1’ [-Wunused-variable] int i,j,m,l,x,y,z,x1,y1,nod; ^