#include <bits/stdc++.h>
const int MAXN = 500'000;
const int MOD = 1'000'000'007;
/*
voi folosi formula :
S(h) = n * 2 ^ n - sum{prod{k <= i, c_k} * 2 ^ (n - i)}
- sum{prod{k >= i, c_k} * 2 ^ (i - 1)}
+ n * prod{c_i}
unde c_i = (a_i < h + b_i < h)
voi face brutul in O(n ^ 2) mai intai, pentru fiecare H voi calcula S(h)
*/
int n;
int a[MAXN + 1], b[MAXN + 1], c[MAXN + 1];
int pow2[MAXN + 1];
void read_data() {
std::cin >> n;
for( int i = 1; i <= n; i++ )
std::cin >> a[i];
for( int i = 1; i <= n; i++ )
std::cin >> b[i];
}
void precompute_power() {
pow2[0] = 1;
for( int i = 1; i <= n; i++ )
pow2[i] = 2 * pow2[i - 1] % MOD;
}
int compute_sum(int h) {
int sum = 0;
sum = 1LL * n * pow2[n] % MOD;
for( int i = 1; i <= n; i++ )
c[i] = (a[i] < h) + (b[i] < h);
int prod = 1;
for( int i = 1; i <= n; i++ ) {
prod = 1LL * prod * c[i] % MOD;
sum = (sum - (1LL * prod * pow2[n - i]) % MOD + MOD) % MOD;
}
prod = 1;
for( int i = n; i >= 1; i-- ) {
prod = 1LL * prod * c[i] % MOD;
sum = (sum - (1LL * prod * pow2[i - 1]) % MOD + MOD) % MOD;
}
sum = (sum + 1LL * prod * n) % MOD;
return sum;
}
int overall_sum() {
int sum = 0;
for( int i = 1; i <= n; i++ ) {
sum = (sum + 1LL * (a[i] + b[i]) * pow2[n - 1]) % MOD;
}
return sum;
}
int height_total() {
int sum = 0;
for( int h = 1; h <= 1000; h++ ) {
sum = (sum + compute_sum(h)) % MOD;
}
return sum;
}
int main() {
read_data();
precompute_power();
int h_sum = height_total();
int tot_sum = overall_sum();
int ans = (h_sum - tot_sum + MOD) % MOD;
std::cout << ans << "\n";
return 0;
}
