#include <bits/stdc++.h>

using namespace std;

template <typename T, typename U>
std::enable_if_t<std::is_same<T, int>::value, T> pow(T x, U n, T mod) {
  T res = 1;
  while (n > 0) {
    if (n & 1)
      res = static_cast<T>(static_cast<int64_t>(res) * static_cast<int64_t>(x) %
                           mod);
    x = static_cast<T>(static_cast<int64_t>(x) * static_cast<int64_t>(x) % mod);
    n >>= 1;
  }
  return res;
}

template <typename T, typename U>
std::enable_if_t<std::is_same<T, int64_t>::value, T> pow(T x, U n, T mod) {
  T res = 1;
  while (n > 0) {
    if (n & 1)
      res = static_cast<T>(static_cast<__int128>(res) *
                           static_cast<__int128>(x) % mod);
    x = static_cast<T>(static_cast<__int128>(x) * static_cast<__int128>(x) %
                       mod);
    n >>= 1;
  }
  return res;
}

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int x, N;
  cin >> x >> N;
  int res = 0, mod = 1000003;
  for (int i = 0; i < N; i++) {
    int a;
    cin >> a;
    res += pow(x, a, mod);
    res %= mod;
  }
  cout << res << '\n';
  return 0;
}