Compilare: user.cpp: In function ‘void query(int, int, int, int, int)’: user.cpp:84:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(ps>=0 && ps<poz[nod].size()) ^ user.cpp:92:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(pf>=0 && pf<poz[nod].size()) ^ user.cpp:104:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(ps>=0 && ps<poz[nod].size()) ^ user.cpp:112:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(pf>=0 && pf<poz[nod].size()) ^ user.cpp: In function ‘int main()’: user.cpp:135:17: warning: unused variable ‘nod’ [-Wunused-variable] int st, dr, nod, i, m, x1, y1, y2, x2; ^ user.cpp: In function ‘void query(int, int, int, int, int)’: user.cpp:112:28: warning: ‘pf1’ may be used uninitialized in this function [-Wmaybe-uninitialized] else if(pf>=0 && pf<poz[nod].size()) ^ user.cpp:104:28: warning: ‘ps1’ may be used uninitialized in this function [-Wmaybe-uninitialized] else if(ps>=0 && ps<poz[nod].size()) ^