#include <bits/stdc++.h>
#define rep(i, a, n) for(int i = a; i < n; i++)
#define repp(i, n) rep(i, 0, n)
#define repb(i, a, b) for(int i = a; i >= b; i--)
#define all(a) a.begin(), a.end()
#define int long long
using namespace std;

int x, n;
const int mod = 1000003;

int mod_pow(int x, int a){
    if(a == 0) return 1;
    if(a % 2) return x * mod_pow(x, a - 1) % mod;
    int res = mod_pow(x, a / 2);
    return res * res % mod;
}

signed main(){
    cin >> x >> n;
    vector<int> a(n);
    rep(i, 0, n) cin >> a[i];
    int ans = 0;
    rep(i, 0, n){
        ans += mod_pow(x, a[i]);
        ans %= mod;
    }
    cout << ans << endl;
}