#include <bits/stdc++.h>

using namespace std;
using ll = long long;

int main() {
	ll res, n, mod = 1000000007;
	cin >> n;
	res = n;
	if (n == 2) {
		cout << 1 << endl;
		return 0;
	}
	for (ll i = 0; i < n - 3; ++i) {
		res <<= 1;
		res %= mod;
	}
	cout << res << endl;
	return 0;
}