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

const int MOD3 = ( int ) 1e6 + 3;

signed main(){
  int X, N; cin >> X >> N;
  int ans = 0;
  function< int ( int, int ) > int_pow = [ & ]( int x, int p ){
    int res = 1;
    while( p ){
      if( p & 1 )
        res = 1LL * res * x % MOD3;
      p >>= 1;
      x = 1LL * x * x % MOD3;
    }
    return res;
  };
  for( int i = 0; i < N; ++i ){
    int A; cin >> A;
    ( ans += int_pow( X, A ) ) %= MOD3;
  }
  cout << ans << endl;
  return 0;
}