Compilare: user.cpp: In function ‘int query(int, int, int, int, int)’: user.cpp:140:63: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (f1 < 0 || (f1 >= 0 && f1 < aint [node].v.size () && aint [node].v [f1].y < yy1 )) { ^ user.cpp:142:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (f1 >= aint [node].v.size ()) ^ user.cpp:133:21: warning: unused variable ‘numst’ [-Wunused-variable] int m, ans = 0, numst = 0, nf1, nf2; ^