#include <iostream>
using namespace std;

#define fastcin {\
    cin.tie(0);\
    ios::sync_with_stdio(false);\
}
#define REP(i, a) for(int i = 0; i < a; i++)
#define scan(x) cin >> x
#define print(x) cout << x << "\n"

typedef long long ll;

const int d = 1000003;

int powmod(ll x, int k) {
    if (k == 0) return 1;
    if (k%2 == 0) return powmod(x*x % d, k/2);
    else return x * powmod(x, k-1) % d;
}

int main() {
    fastcin;

    int x, N;
    cin >> x >> N;
    ll a, ans = 0;

    REP(i, N) {
        scan(a);
        ans += powmod(x, a);
    }
    print(ans%d);

    return 0;
}