#include <bits/stdc++.h>
#define FOR(i,bg,ed) for(ll i=(bg);i<(ed);i++)
#define REP(i,n) FOR(i,0,n)
#define MOD 1000000007
#define int long long
using namespace std;
typedef long long ll;
typedef vector<vector<ll>> mat;
const int INF = 1e9;

ll mod_pow(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;
}

signed main()
{
    int x, N;
    int a;

    const int mod = 1000003;

    cin >> x >> N;
    int ans = 0;
    REP(i,N) {
        cin >> a;
        ans += mod_pow(x, a, mod);
    }

    cout << ans % mod << endl;
}