#include <bits/stdc++.h>
using namespace std;
typedef unsigned long long ul;
typedef signed long long ll;
ul over = 1000000007;

ll apow(ll x, ll a)
{
  ll ret = 1;
  vector< int > bit;
  while (a>0) {bit.push_back(a%2); a/=2;}
  for (int i = bit.size()-1; i >= 0; --i) {
    if (bit[i] == 1) ret *= x;
    if (i==0) break;
    ret *= ret;
    ret %= 1000003;
  }
  return ret;
}

int main(void)
{
  cin.tie(0);
  ios::sync_with_stdio(false);
  cout << fixed;
  ll x, n;
  cin >> x >> n;
  ll ans = 0;
  for (ll i = 0; i < n; ++i) {
    ll a;
    cin >> a;
    ans += apow(x, a);
    ans %= 1000003;
  }
  cout << ans << endl;
  return 0;
}