#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for (int (i)=(0);(i)<(int)(n);++(i))
using ll = long long;
using P = pair<ll, ll>;
using namespace std;

template<class T> void vin(vector<T>& v, int n) {
    v.resize(n);
    for (int i = 0; i < n; ++i) {
        cin >> v[i];
    }
}

ll mod = 1e9+7;

int main() {
    ll N;
    cin >> N;
    N %= mod;
    ll ans = 13;
    rep(i, N-1) {
        ans = (ans * 10LL % mod) + 3LL;
        ans %= mod;
    }
    cout << ans << endl;
}