Compilare: user.cpp: In function ‘int bkt(int, int)’: user.cpp:88:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<q[nod].size();i++){ ^ user.cpp:94:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<q[n2].size();j++){ ^ user.cpp: In function ‘int main()’: user.cpp:150:8: warning: variable ‘o’ set but not used [-Wunused-but-set-variable] int o=lee(xx,yy); ^ user.cpp: In function ‘int bkt(int, int)’: user.cpp:106:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp:98:18: warning: ‘poz’ may be used uninitialized in this function [-Wmaybe-uninitialized] q[n2][poz]=-1; ^