#include <bits/stdc++.h>

using namespace std;

#define rep(i, n) for(int i = 0; i < (int)n; ++i)
#define FOR(i, a, b) for(int i = a; i < (int)b; ++i)
#define rrep(i, n) for(int i = ((int)n - 1); i >= 0; --i)

typedef long long ll;
typedef long double ld;

const int Inf = 1e9;
const double EPS = 1e-9;
const int MOD = 1e6 + 3;

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

int main() {
    cin.tie(nullptr);
    ios::sync_with_stdio(0);
    int x, n;
    cin >> x >> n;
    vector<int> a(n);
    rep (i, n) cin >> a[i];
    ll res = 0;
    rep (i, n) {
        res += modpower(x, a[i], MOD);
        res %= MOD;
    }
    cout << res << endl;
    
    return 0;
}