#include #if __has_include() #endif using namespace std; #define LL(...) ll __VA_ARGS__;lin(__VA_ARGS__) #define RDVV(T,n,...) vec__VA_ARGS__;fe(refs(__VA_ARGS__),e)e.get().resizes(n);vin(__VA_ARGS__) #define VV(n,...) RDVV(ll,n,__VA_ARGS__) #define fo(i,...) for(auto[i,i##stop,i##step]=for_range(0,__VA_ARGS__);ivoid pp(const auto&...a){[[maybe_unused]]const char*c="";((o<(a...);} #define entry defpp void main();void main2();}int main(){my::io();my::main();}namespace my{ namespace my{ void io(){cin.tie(nullptr)->sync_with_stdio(0);cout<constexpr auto for_range(T s,T b){T a=0;if(s)swap(a,b);return array{a-s,b,1-s*2};} void lin(auto&...a){(cin>>...>>a);} void vin(auto&...a){fo(i,(a.size()&...))(cin>>...>>a[i]);} auto min(auto...a){return min(initializer_list>{a...});} templateusing pack_back_t=tuple_element_t>; } namespace my{ templateconcept vectorial=is_base_of_v::value_type>,remove_cvref_t>; templateconstexpr int depth=0; templateconstexpr int depth =depth+1; templatestruct core_t_helper{using type=T;}; templateusing core_t=core_t_helper::type; templatestruct vec; templatestruct hvec_helper{using type=vec::type>;}; templatestruct hvec_helper<0,T>{using type=T;}; templateusing hvec=hvec_helper::type; templatestruct vec:vector{ static constexpr int D=depth>; using C=core_t; using vector::vector; void resizes(const auto&...a){if constexpr(sizeof...(a)==D)*this=make(a...,C{});else{ }} static auto make(ll n,const auto&...a){ if constexpr(sizeof...(a)==1)return vec(n,array{a...}[0]); else { } } ll size()const{return vector::size();} }; templaterequires(sizeof...(A)>=2)vec(const A&...a)->vec>>; } namespace my{entry void main(){ LL(N); VV(N,a,b); ll ans=0; veccnt(3); fo(i,N){ if(a[i]%8==0)ans+=b[i]; else if(a[i]%4==0)cnt[2]+=b[i]; else if(a[i]%2==0)cnt[1]+=b[i]; } ll t=min(cnt[1],cnt[2]); ans+=t; cnt[1]-=t; cnt[2]-=t; ans+=cnt[1]/3; ans+=cnt[2]/2; pp(ans); }}