#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int main () {
    int N;
    cin >> N;
    ll m = 1e9 + 7;
    ll kj = 1;
    ll ans = 0;
    for (int i = 0; i < N; i ++) {
        ans += kj;
        if (ans >= m) {
            ans -= m;
        }
        kj *= 10;
        kj %= m;
    }
    kj = 0;
    for (int i = 1; i < 10; i ++) {
        ll x;
        cin >> x;
        kj += (x * i) % m;
        if (kj >= m) kj -= m;
    }
    cout << (ans * kj) % m << endl;
}