Compilare: user.cpp: In constructor ‘Aint::Aint(std::vector<int>, int)’: user.cpp:127:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(rule==0) for(int i=0;i<V.size();i++) update(i+1,v[V[i]]); ^ user.cpp:128:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(rule==1) for(int i=0;i<V.size();i++) update(i+1,V[i]); ^ user.cpp: In member function ‘int Aint::Query(int, int, int, int, int)’: user.cpp:115:5: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘void DfsChain(int, int)’: user.cpp:57:13: warning: ‘maxw’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(*it==maxw) DfsChain(*it,wh); ^