#define _GLIBCXX_DEBUG
#define ll long long
#include <bits/stdc++.h>
using namespace std;
using Graph = vector<vector<int>>;

int main(){
  int X, N; cin >> X >> N;
  ll ans = 0;
  for(int i = 0; i < N; i++){
    ll A; cin >> A;
    int j = 0;
    ll sum = 1;
    while(j < A){
      sum *= X;
      sum %= 1000003;
      j++;
    }
    ans += sum;
    ans %= 1000003;
  }
  cout << ans << endl;
}