#include<algorithm>
#include<cmath>
#include<complex>
#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<iostream>
#include<map>
#include<queue>
#include<stack>
#include<string>
#include<vector>
using namespace std;

typedef long long int ll;
typedef unsigned long long int llu;
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<pair<int, int> > vii;

#define rrep(i, m, n) for(int i=m; i<n;  i++)
#define erep(i, n)    for(int i=1; i<=n; i++)
#define  rep(i, n)    for(int i=0; i<n;  i++)
#define rrev(i, m, n) for(int i=n-1; i>=m; i--)
#define erev(i, n)    for(int i=n; i>=1; i--)
#define  rev(i, n)    for(int i=n-1; i>=0; i--)
#define FOREACH(v) (v).begin(), (v).end
#define CNT(a, n, x)  (upper_bound(a, a+n, x)-lower_bound(a, a+n, x))
#define minup(m, x)   (m=min(m, x))
#define maxup(m, x)   (m=max(m, x))

#define INF 1000000000
#define MOD 1000003
#define EPS 1E-8

ll modPow(ll x, ll n, ll mod);

ll x;
int n;
ll a;
ll res;

int main()
{
  cin >> x >> n;

  rep(i, n){
    cin >> a;
    res = (res + modPow(x, a, MOD)) % MOD;
  }

  cout << res << endl;

  return 0;
}

ll modPow(ll x, ll n, ll mod)
{
  ll res = 1;
  while(n > 0){
    if(n & 1) res = res * x % mod;
    x = x * x % mod;
    n >>= 1;
  }
  return res;
}