Compilare: user.cpp: In function ‘int bkt(int, int)’: user.cpp:87:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<q[nod].size();i++){ ^ user.cpp:93:34: 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:146:8: warning: unused variable ‘o’ [-Wunused-variable] int o=bkt(2,1); ^ user.cpp: In function ‘int bkt(int, int)’: user.cpp:105:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp:97:18: warning: ‘poz’ may be used uninitialized in this function [-Wmaybe-uninitialized] q[n2][poz]=-1; ^