#include<bits/stdc++.h>
using namespace std;
using LL = long long;
using ULL = unsigned long long;
#define rep(i,n) for(int i=0; i<(n); i++)

const ULL M = 1000003;

ULL powm(ULL x, ULL i) {
    if (i == 0) return 1;
    ULL res = powm(x * x % M, i / 2);
    if (i % 2 == 1) res = res * x % M;
    return res;
}

int main() {
    ULL x, N; cin >> x >> N;
    ULL ans = 0;
    rep(i, N) { ULL a; cin >> a; ans += powm(x, a); }
    ans %= M;
    cout << ans << endl;

    return 0;
}