#include <bits/stdc++.h>
using namespace std;
#if __has_include(<atcoder/all>)
#include <atcoder/all>
using namespace atcoder;
using mint = modint998244353;
#endif
using ll = long long;
using ld = long double;
const ll INF = 1ll<<60;
const ld EPS = 1.0/1e9;
#define endl "\n"
#define rep(i,a,b) for(int i=a;i<b;i++)
#define rrep(i,a,b) for(int i=a;i>=b;i--)
#define fore(i,a) for(auto &i:a)
#define all(x) (x).begin(),(x).end()
#define del(x) sort(all(x)); x.erase(unique(all(x)),x.end());

ll pw[40];

ll pw_md(ll x){
  ll res=1;
  ll cnt=0;
  while(x){
    if(x%2==1){
      res*=(pw[cnt+1]);
      res%=1000003;
    } 
    cnt++;
    x/=2;
  }
  return res;
}


int main(){
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  ll x,n; cin >> x >> n;
  pw[0]=1;
  pw[1]=x;
  rep(i,1,39){
    pw[i+1]=(pw[i]*pw[i])%1000003;
  }
  ll ans=0;
  rep(i,0,n){
    ll a; cin >> a;
    ans+=pw_md(a);
    ans%1000003;
  }
  cout << ans << endl;
}