#include <algorithm>
#include <cstdio>
#include <cstdlib>
#include <cctype>
#include <cmath>
#include <iostream>
#include <queue>
#include <list>
#include <map>
#include <numeric>
#include <set>
#include <sstream>
#include <string>
#include <vector>
using namespace std;
#define REP(i,a,n) for(int i=(a); i<(int)(n); i++)
#define rep(i,n) REP(i,0,n)
#define FOR(it,c) for(__typeof((c).begin()) it=(c).begin(); it!=(c).end(); ++it)
#define ALLOF(c) (c).begin(), (c).end()
typedef long long ll;

#define MOD 1000003
ll mod_pow(ll x, ll n){
  ll res = 1;
  while(n>0){
    if(n&1) res = res*x%MOD;
    x = x*x%MOD;
    n >>= 1;
  }
  return res;
}

int main(){
  int N;
  ll x, a;
  vector<ll> A;
  cin >> x >> N;
  rep(i,N){
    cin >> a;
    A.push_back(a);
  }

  ll ret = 0;
  rep(i,N){
    ret += mod_pow(x, A[i]);
    ret %= MOD;
  }
  cout << ret << endl;
  
  return 0;
}