#include <iostream>
#include <cstdio>

using namespace std;

typedef long long LL;

const int MOD = 1000000007;

LL n, ans;

int main() {
    scanf("%lld", &n);
    ans = n % 2 ? 3LL : 1LL;
    if (n % 2) --n;
    n /= 2;
    for (int i = 0; i < n; ++i) {
        if (i == 0) ans = ans * 4 % MOD;
        else ans = ans * 5 % MOD;
    }
    printf("%lld\n", ans);

    return 0;
}