#include "bits/stdc++.h"
using namespace std;
#define ll long long int
#define rep(i,n) for( int i = 0; i < n; i++ )
#define rrep(i,n) for( int i = n; i >= 0; i-- )
#define REP(i,s,t) for( int i = s; i <= t; i++ )
#define RREP(i,s,t) for( int i = s; i >= t; i-- )
#define dump(x)  cerr << #x << " = " << (x) << endl;
#define INF 2000000000
#define mod 1000003
#define INF2 1000000000000000000
#define int long long
int square(int x) {
	return (x * x) % mod;
}
int power(int x, int y) {
	if (y == 0) return 1;
	else if (y == 1) return x % mod;
	else if (y % 2 == 0) return square(power(x, y / 2)) % mod;
	else return square(power(x, y / 2)) * x % mod;
}

signed main(void)
{
    cin.tie(0);
    ios::sync_with_stdio(false);
	int x, N;
	cin >> x >> N;
	int ans = 0;
	rep(i, N) {
		int a; cin >> a;
		ans += power(x, a);
		ans %= mod;
	}
	cout << ans << endl;

    return 0;
}