#include <bits/stdc++.h>
#include<atcoder/all>
using namespace std;
using namespace atcoder;

using ll=long long;
ll mod=1000003;
ll INF=1LL<<60;

int main() {
  int N;
  ll X,ans=0;
  cin >> X >> N;
  for(int i=0;i<N;i++){
	  int A;
	  cin >> A;
	  ans+=pow_mod(X,A,mod);
	  ans%=mod;
  }
  cout << ans << endl;
}