#include <bits/extc++.h>

#ifndef DUMP
#define DUMP(...) void(0)
#endif

using namespace std;

template <class T>
struct fenwick {
  int n;
  vector<T> t;
  fenwick(int _n = 0) : n(_n), t(n) {}
  void add(int i, T a) {
    for (++i; i <= n; i += i & -i) t[i - 1] += a;
  }
  T sum(int i) const {
    T s = 0;
    for (; i; i -= i & -i) s += t[i - 1];
    return s;
  }
};

int main() {
  cin.tie(nullptr)->sync_with_stdio(false);
  int n;
  cin >> n;
  vector<int> a(n), b(n);
  for (auto&& e : a) cin >> e;
  for (auto&& e : b) cin >> e;

  adjacent_difference(begin(a), end(a), begin(a), bit_xor<>());
  adjacent_difference(begin(b), end(b), begin(b), bit_xor<>());
  auto sa = a, sb = b;
  sort(begin(sa), end(sa));
  sort(begin(sb), end(sb));
  if (a[0] != b[0] or sa != sb) {
    cout << "-1\n";
    exit(0);
  }
  DUMP(a);
  DUMP(b);

  vector<int> ord_a(n), ord_b(n);
  iota(begin(ord_a), end(ord_a), 0);
  iota(begin(ord_b), end(ord_b), 0);
  stable_sort(begin(ord_a), end(ord_a),
              [&](int i, int j) { return a[i] < a[j]; });
  stable_sort(begin(ord_b), end(ord_b),
              [&](int i, int j) { return b[i] < b[j]; });
  vector<int> rnk_a(n), rnk_b(n);
  for (int k = 0; k < n; ++k) rnk_a[ord_a[k]] = k;
  vector<int> p(n);
  for (int i = 0; i < n; ++i) p[i] = ord_b[rnk_a[i]];

  int64_t res = 0;
  fenwick<int> ft(n);
  for (int i = n; i--;) {
    res += ft.sum(p[i]);
    ft.add(p[i], 1);
  }
  cout << res << '\n';
}