#include <bits/stdc++.h>

#define int long long

using namespace std;

signed main(){
    cin.tie(0);
    ios::sync_with_stdio(0);
    int n;
    cin >> n;
    int mod = 1000000007;

    int sol = n;

    if(n == 2){
        cout << "1\n";
        return 0;
    }

    for(int i = 0; i < n-3; i++){
        sol = (sol * 2) % mod;
    }

    //sol = (n * sol) % mod;

    cout << sol << "\n";

}