#include <vector>
#include <queue>
#include <deque>
#include <stack>
#include <map>
#include <set>
#include <algorithm>
#include <functional>
#include <iostream>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <ctime>
#include <cctype>
#include <string>
#include <cstring>

using namespace std;

typedef long long ll;

#define MODN 1000003

ll expoModN(ll a, ll b) {
  if (b == 1) return a;
  if (b == 0) return 1;
  ll t = (expoModN(a, b/2)%MODN);
  return (((t*t)%MODN)*(expoModN(a, b%2)%MODN))%MODN;
}

int main() {
  ll x, n;
  cin >> x >> n;
  ll sum = 0;
  for (int i = 0; i < n; i++) {
    ll t; cin >> t;
    sum = (sum+expoModN(x, t))%MODN;
  }
  cout << sum << endl;
}