#include <iostream>
#include <vector>
#include <algorithm>
#include <queue>

using namespace std;

const int N = 500010;
int X[N], L[N];

class FastScanner {
public:
    FastScanner() {
        ios::sync_with_stdio(false);
        cin.tie(nullptr);
    }

    int nextInt() {
        int x;
        cin >> x;
        return x;
    }
};

int main() {
    FastScanner f;
    int n = f.nextInt();
    priority_queue<int> q;
    vector<array<int, 3>> tr;
    for (int i = 1; i <= n; ++i) X[i] = f.nextInt();
    for (int i = 1; i <= n; ++i) L[i] = f.nextInt();
    for (int i = 1; i <= n; ++i) tr.push_back({X[i] + L[i], X[i], L[i]});
    sort(tr.begin(), tr.end());
    
    long long sum = 0, ans = 0;
    for (int i = 1; i <= n; ++i) {
        auto &c = tr[i - 1];
        int X1 = c[1], L1 = c[2];
        if (sum <= L1) {
            sum += X1;
            q.push(X1);
            ++ans;
        } else {
            if (!q.empty() && q.top() > X1) {
                sum -= q.top();
                q.pop();
                sum += X1;
                q.push(X1);
            }
        }
    }
    cout << ans << "\n";
    return 0;
}

answer.code: In function ‘int main()’:
answer.code:32:46: error: no matching function for call to ‘std::vector<std::array<int, 3> >::push_back(<brace-enclosed initializer list>)’
   32 |     for (int i = 1; i <= n; ++i) tr.push_back({X[i] + L[i], X[i], L[i]});
      |                                  ~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/13/vector:66,
                 from answer.code:2:
/usr/include/c++/13/bits/stl_vector.h:1278:7: note: candidate: ‘constexpr void std::vector<_Tp, _Alloc>::push_back(const value_type&) [with _Tp = std::array<int, 3>; _Alloc = std::allocator<std::array<int, 3> >; value_type = std::array<int, 3>]’
 1278 |       push_back(const value_type& __x)
      |       ^~~~~~~~~
/usr/include/c++/13/bits/stl_vector.h:1278:35: note:   no known conversion for argument 1 from ‘<brace-enclosed initializer list>’ to ‘const std::vector<std::array<int, 3> >::value_type&’ {aka ‘const std::array<int, 3>&’}
 1278 |       push_back(const value_type& __x)
      |                 ~~~~~~~~~~~~~~~~~~^~~
/usr/include/c++/13/bits/stl_vector.h:1295:7: note: candidate: ‘constexpr void std::vector<_Tp, _Alloc>::push_back(value_type&&) [with _Tp = std::array<int, 3>; _Alloc = std::allocator<std::array<int, 3> >; value_type = std::array<int, 3>]’
 1295 |       push_back(value_type&& __x)
      |       ^~~~~~~~~
/usr/include/c++/13/bits/stl_vector.h:1295:30: note:   no known conversion for argument 1 from ‘<brace-enclosed initializer list>’ to ‘std::vector<std::array<int, 3> >::value_type&&’ {aka ‘std::array<int, 3>&&’}
 1295 |       push_back(value_type&& __x)
      |                 ~~~~~~~~~~~~~^~~
answer.code:38:19: error: no match for ‘operator[]’ (operand types are ‘std::array<int, 3>’ and ‘int’)
   38 |         int X1 = c[1], L1 = c[2];
      |                   ^
answer.code:39:20: error: ‘L1’ was not declared in this scope; did you mean ‘X1’?
   39 |         if (sum <= L1) {
      |                    ^~
      |                    X1
/usr/include/c++/13/bits/stl_vector.h: In instantiation of ‘constexpr std::_Vector_base<_Tp, _Alloc>::~_Vector_base() [with _Tp = std::array<int, 3>; _Alloc = std::allocator<std::array<int, 3> >]’:
/usr/include/c++/13/bits/stl_vector.h:528:7:   required from here
/usr/include/c++/13/bits/stl_vector.h:367:49: error: invalid use of incomplete type ‘struct std::array<int, 3>’
  367 |                       _M_impl._M_end_of_storage - _M_impl._M_start);
      |                       ~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/13/bits/uses_allocator_args.h:38,
                 from /usr/include/c++/13/bits/memory_resource.h:41,
                 from /usr/include/c++/13/string:58,
                 from /usr/include/c++/13/bits/locale_classes.h:40,
                 from /usr/include/c++/13/bits/ios_base.h:41,
                 from /usr/include/c++/13/ios:44,
                 from /usr/include/c++/13/ostream:40,
                 from /usr/include/c++/13/iostream:41,
                 from answer.code:1:
/usr/include/c++/13/tuple:2005:45: note: declaration of ‘struct std::array<int, 3>’
 2005 |   template<typename _Tp, size_t _Nm> struct array;
      |                                             ^~~~~
/usr/include/c++/13/bits/stl_vector.h: In instantiation of ‘constexpr std::vector<_Tp, _Alloc>::reference std::vector<_Tp, _Alloc>::operator[](size_type) [with _Tp = std::array<int, 3>; _Alloc = std::allocator<std::array<int, 3> >; reference = std::array<int, 3>&; size_type = long unsigned int]’:
answer.code:37:27:   required from here
/usr/include/c++/13/bits/stl_vector.h:1126:41: error: invalid use of incomplete type ‘struct std::array<int, 3>’
 1126 |         return *(this->_M_impl._M_start + __n);
      |                 ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~
/usr/include/c++/13/tuple:2005:45: note: declaration of ‘struct std::array<int, 3>’
 2005 |   template<typename _Tp, size_t _Nm> struct array;
      |                                             ^~~~~
In file included from /usr/include/c++/13/string:48:
/usr/include/c++/13/bits/stl_iterator.h: In instantiation of ‘constexpr typename __gnu_cxx::__normal_iterator<_Iterator, _Container>::difference_type __gnu_cxx::operator-(const __normal_iterator<_Iterator, _Container>&, const __normal_iterator<_Iterator, _Container>&) [with _Iterator = std::array<int, 3>*; _Container = std::vector<std::array<int, 3> >; typename __normal_iterator<_Iterator, _Container>::difference_type = long int]’:
/usr/include/c++/13/bits/stl_algo.h:1948:22:   required from ‘constexpr void std::__sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<array<int, 3>*, vector<array<int, 3> > >; _Compare = __gnu_cxx::__ops::_Iter_less_iter]’
/usr/include/c++/13/bits/stl_algo.h:4861:18:   required from ‘constexpr void std::sort(_RAIter, _RAIter) [with _RAIter = __gnu_cxx::__normal_iterator<array<int, 3>*, vector<array<int, 3> > >]...