#include"bits/stdc++.h"
//#include<bits/stdc++.h>
using namespace std;
#define print(x) cout<<x<<endl;
#define rep(i,a,b) for(int i=a;i<b;i++)
typedef long long ll;
const int mod = 1000003;

ll powmod(int x, int p) {
	if (p == 0)return 1;
	if (p % 2 == 1) { return x*powmod(x, p - 1)%mod; }
	ll c=powmod(x, p / 2)%mod;
	return c*c%mod;
}

int main() {
	int x, n;
	ll a[102];
	ll ans = 0;
	cin >> x >> n;
	rep(i, 0, n) {
		cin >> a[i];
		ans += powmod(x, a[i])%mod;
	}
	ans %= mod;
	print(ans);
	return 0;
}