//  Bit Strings

#include<bits/stdc++.h>

using namespace std;
using ll = long long;
ll MOD = 1e9 + 7;

int main() {
    int n; cin >> n;
    ll ans = 1;
    for (int i{}; i < n; i++) {
        ans *= 2;
        ans %= MOD;
    }
    ans %= MOD;
    cout << ans;
    return 0;
}